{"id":150,"date":"2026-10-12T18:34:05","date_gmt":"2026-10-12T10:34:05","guid":{"rendered":"https:\/\/www.oldhamburger.cn\/?p=150"},"modified":"2026-10-12T18:34:05","modified_gmt":"2026-10-12T10:34:05","slug":"flyback-220vac-5v-design-guide","status":"publish","type":"post","link":"https:\/\/www.oldhamburger.cn\/index.php\/2026\/10\/12\/flyback-220vac-5v-design-guide\/","title":{"rendered":"\u53cd\u6fc0\u7535\u6e90\u8be6\u89e3\uff1a220V\u4ea4\u6d41\u8f6c5V\uff0c\u4ece\u7535\u8def\u62d3\u6251\u3001\u53c2\u6570\u8ba1\u7b97\u5230\u53d8\u538b\u5668\u7ed5\u5236\u4e0e\u8c03\u8bd5"},"content":{"rendered":"<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-01-cover.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u53cd\u6fc0\u7535\u6e90\u4ece\u96f6\u5230\u5b9e\u6218\uff1a\u62d3\u6251\u3001\u8ba1\u7b97\u3001\u78c1\u4ef6\u3001\u63a7\u5236\u4e0e\u8c03\u8bd5\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-01-cover.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<p>\u53cd\u6fc0\u7535\u6e90\u770b\u8d77\u6765\u53ea\u6709\u4e00\u4e2a\u5f00\u5173\u7ba1\u3001\u4e00\u4e2a\u53d8\u538b\u5668\u548c\u4e00\u53ea\u6574\u6d41\u4e8c\u6781\u7ba1\uff0c\u5374\u80fd\u5b9e\u73b0\u9694\u79bb\u3001\u5347\u964d\u538b\u4ee5\u53ca\u591a\u8def\u8f93\u51fa\u3002\u56f0\u96be\u4e5f\u6070\u6070\u85cf\u5728\u8fd9\u51e0\u4e2a\u5143\u4ef6\u91cc\uff1a\u5f00\u5173\u5173\u65ad\u4ee5\u540e\uff0c\u7535\u6d41\u4e3a\u4ec0\u4e48\u4f1a\u4ece\u521d\u7ea7\u8f6c\u5230\u6b21\u7ea7\uff1f\u53d8\u538b\u5668\u4e3a\u4ec0\u4e48\u9700\u8981\u6c14\u9699\uff1f\u4e3a\u4ec0\u4e48\u6f0f\u6781\u7535\u538b\u8fdc\u9ad8\u4e8e\u8f93\u5165\u7535\u538b\uff1f\u4e3a\u4ec0\u4e48\u8f93\u51fa\u662f\u5341\u4e8c\u4f0f\uff0c\u6574\u6d41\u4e8c\u6781\u7ba1\u5374\u53ef\u80fd\u9700\u8981\u4e00\u767e\u4f0f\u8010\u538b\uff1f\u4e3a\u4ec0\u4e48\u540c\u6837\u7684\u7535\u611f\u548c\u531d\u6bd4\uff0c\u5728\u8f7b\u8f7d\u4e0e\u91cd\u8f7d\u4e0b\u4f1a\u5448\u73b0\u4e0d\u540c\u6ce2\u5f62\uff1f<\/p>\n<p>\u672c\u6587\u4ece\u8fd9\u4e9b\u95ee\u9898\u5f00\u59cb\uff0c\u9010\u6b65\u5efa\u7acb\u80fd\u81ea\u5df1\u8ba1\u7b97\u3001\u753b\u56fe\u3001\u7ed5\u5236\u548c\u6d4b\u8bd5\u7684\u53cd\u6fc0\u8bbe\u8ba1\u65b9\u6cd5\u3002\u6587\u7ae0\u5305\u542b\u57fa\u672c\u62d3\u6251\u3001\u5bfc\u901a\u4e0e\u5173\u65ad\u7535\u6d41\u8def\u5f84\u3001DCM\/CCM\/\u4e34\u754c\u6a21\u5f0f\u3001\u516c\u5f0f\u63a8\u5bfc\u3001\u4e24\u4e2a\u5b8c\u6574\u7b97\u4f8b\u3001\u78c1\u82af\u4e0e\u7ed5\u7ec4\u5de5\u827a\u3001MOSFET \u4e0e\u6574\u6d41\u5668\u3001\u8f93\u5165\u8f93\u51fa\u7535\u5bb9\u3001RCD \u94b3\u4f4d\u3001\u53cd\u9988\u8865\u507f\u3001PCB \u5e03\u5c40\u3001\u542f\u52a8\u4fdd\u62a4\u548c\u6545\u969c\u6392\u67e5\u3002\u914d\u56fe\u4e3a\u6309\u672c\u6587\u5b9a\u4e49\u7ed8\u5236\u7684\u6559\u5b66\u793a\u610f\uff0c\u7b97\u4f8b\u6570\u503c\u4f1a\u5728\u6587\u672b\u6c47\u603b\uff0c\u4fbf\u4e8e\u8fb9\u8bfb\u8fb9\u6838\u5bf9\u3002<\/p>\n<p>\u4e3b\u7b97\u4f8b\u4ee5 220 V \u4ea4\u6d41\u8f93\u5165\u30015 V \u9694\u79bb\u8f93\u51fa\u4e3a\u76ee\u6807\uff0c\u5e76\u628a\u4ea4\u6d41\u6574\u6d41\u3001\u9ad8\u538b\u6bcd\u7ebf\u3001\u50a8\u80fd\u3001\u542f\u52a8\u548c\u9694\u79bb\u653e\u8fdb\u540c\u4e00\u5f20\u8bbe\u8ba1\u8868\u3002\u8ba1\u7b97\u7ed3\u679c\u662f\u6837\u673a\u8bbe\u8ba1\u8d77\u70b9\uff1b\u78c1\u82af\u6750\u6599\u3001\u63a7\u5236\u5668\u548c\u5177\u4f53\u5668\u4ef6\u578b\u53f7\u786e\u5b9a\u4ee5\u540e\uff0c\u8fd8\u9700\u8981\u6309\u5176\u6570\u636e\u624b\u518c\u53ca\u5b9e\u9645\u6d4b\u8bd5\u4fee\u6b63\u3002\u5e02\u7535\u4fa7\u6574\u6d41\u540e\u5177\u6709\u5371\u9669\u7535\u538b\uff0c\u6d4b\u8bd5\u5e94\u4f7f\u7528\u5408\u9002\u7684\u9694\u79bb\u3001\u9650\u6d41\u3001\u5dee\u5206\u6d4b\u91cf\u548c\u653e\u7535\u63aa\u65bd\uff0c\u4e0d\u80fd\u76f4\u63a5\u628a\u666e\u901a\u63a5\u5730\u793a\u6ce2\u5668\u7684\u5730\u5939\u63a5\u5230\u70ed\u5730\u3002<\/p>\n<p>\u5982\u679c\u4f60\u5df2\u7ecf\u8bfb\u8fc7\u300a<a href=\"https:\/\/www.oldhamburger.cn\/index.php\/2026\/09\/19\/transformer-calculation-winding-guide\/\">\u53d8\u538b\u5668\u53c2\u6570\u8ba1\u7b97\u4e0e\u7ed5\u5236\u5b9e\u6218<\/a>\u300b\uff0c\u8fd9\u7bc7\u53ef\u4ee5\u4f5c\u4e3a\u5b83\u7684\u53cd\u6fc0\u7535\u6e90\u5e94\u7528\u7bc7\uff1b\u6ca1\u6709\u8bfb\u8fc7\u4e5f\u80fd\u4ece\u7b2c\u4e00\u7ae0\u987a\u7740\u5b66\u3002<\/p>\n<div class=\"toc\">\n<ul>\n<li><a href=\"#_1\">\u4e00\u3001\u53cd\u6fc0\u5230\u5e95\u662f\u4ec0\u4e48\uff1a\u5148\u7406\u89e3\u80fd\u91cf\u7684\u65f6\u95f4\u987a\u5e8f<\/a><\/li>\n<li><a href=\"#_2\">\u4e8c\u3001\u57fa\u672c\u7535\u8def\u62d3\u6251\uff1a\u628a\u6bcf\u4e2a\u5668\u4ef6\u653e\u56de\u5b83\u7684\u4f5c\u7528<\/a><\/li>\n<li><a href=\"#_3\">\u4e09\u3001\u4e00\u4e2a\u5f00\u5173\u5468\u671f\u91cc\u7684\u4e09\u4e2a\u9636\u6bb5<\/a><\/li>\n<li><a href=\"#_4\">\u56db\u3001\u7b26\u53f7\u3001\u65b9\u5411\u4e0e\u5355\u4f4d\uff1a\u5148\u6d88\u9664\u8ba1\u7b97\u6b67\u4e49<\/a><\/li>\n<li><a href=\"#_5\">\u4e94\u3001\u4ece\u7535\u611f\u57fa\u672c\u5b9a\u5f8b\u63a8\u5bfc\u7535\u6d41\u3001\u78c1\u5bc6\u4e0e\u50a8\u80fd<\/a><\/li>\n<li><a href=\"#dcmccm\">\u516d\u3001DCM\u3001CCM\u3001\u4e34\u754c\u6a21\u5f0f\u4e0e\u51c6\u8c10\u632f<\/a><\/li>\n<li><a href=\"#dcm\">\u4e03\u3001DCM \u5b8c\u6574\u8ba1\u7b97\u94fe\uff1a\u5148\u80fd\u91cf\uff0c\u518d\u7535\u6d41\uff0c\u518d\u65f6\u5e8f<\/a><\/li>\n<li><a href=\"#ccm\">\u516b\u3001CCM \u8ba1\u7b97\u94fe\uff1a\u5360\u7a7a\u6bd4\u3001\u5cf0\u8c37\u503c\u548c\u80fd\u91cf\u5dee<\/a><\/li>\n<li><a href=\"#_6\">\u4e5d\u3001\u5148\u9009\u53cd\u5c04\u7535\u538b\uff0c\u518d\u770b\u7535\u538b\u5e94\u529b\u4e0e\u9000\u78c1<\/a><\/li>\n<li><a href=\"#220-v-ac-5-v2-a-dcm\">\u5341\u3001\u4e3b\u7b97\u4f8b\uff1a220 V AC \u8f93\u5165\uff0c5 V\/2 A \u7684\u9694\u79bb DCM \u53cd\u6fc0<\/a><\/li>\n<li><a href=\"#_7\">\u5341\u4e00\u3001\u7528\u4e3b\u7b97\u4f8b\u5b8c\u6210\u78c1\u82af\u3001\u531d\u6570\u3001\u7535\u611f\u548c\u6c14\u9699\u8bbe\u8ba1<\/a><\/li>\n<li><a href=\"#_8\">\u5341\u4e8c\u3001\u53cd\u6fc0\u7ed5\u7ec4\u600e\u4e48\u7ed5\uff1a\u4ece\u666e\u901a\u5206\u5c42\u5230\u4e09\u660e\u6cbb<\/a><\/li>\n<li><a href=\"#220-v\">\u5341\u4e09\u3001220 V \u4ea4\u6d41\u8f93\u5165\u524d\u7aef\uff1a\u6865\u5806\u3001\u50a8\u80fd\u4e0e\u6700\u4f4e\u6bcd\u7ebf<\/a><\/li>\n<li><a href=\"#mosfet\">\u5341\u56db\u3001MOSFET \u9009\u578b\uff1a\u8010\u538b\u3001\u635f\u8017\u3001\u9a71\u52a8\u548c\u52a8\u6001\u5e94\u529b<\/a><\/li>\n<li><a href=\"#_9\">\u5341\u4e94\u3001\u6b21\u7ea7\u6574\u6d41\uff1a\u4e8c\u6781\u7ba1\u4e0e\u540c\u6b65\u6574\u6d41\u7684\u53d6\u820d<\/a><\/li>\n<li><a href=\"#esrrms\">\u5341\u516d\u3001\u8f93\u51fa\u7535\u5bb9\uff1a\u5bb9\u91cf\u3001ESR\u3001RMS \u548c\u77ac\u6001\u4e00\u8d77\u7b97<\/a><\/li>\n<li><a href=\"#rcd\">\u5341\u4e03\u3001RCD \u94b3\u4f4d\uff1a\u5148\u5f04\u6e05\u7535\u538b\u5b9a\u4e49\uff0c\u518d\u7b97\u963b\u5bb9<\/a><\/li>\n<li><a href=\"#rc-tvs\">\u5341\u516b\u3001RC \u5438\u6536\u3001TVS \u4e0e\u6709\u6e90\u94b3\u4f4d\u5206\u522b\u89e3\u51b3\u4ec0\u4e48<\/a><\/li>\n<li><a href=\"#_10\">\u5341\u4e5d\u3001\u63a7\u5236\u5668\u4e0e\u7535\u6d41\u91c7\u6837\uff1a\u8ba9\u8ba1\u7b97\u843d\u5230\u771f\u5b9e\u8109\u51b2\u4e0a<\/a><\/li>\n<li><a href=\"#tl431\">\u4e8c\u5341\u3001\u8f93\u51fa\u53cd\u9988\uff1aTL431\u3001\u5149\u8026\u548c\u539f\u8fb9\u53cd\u9988<\/a><\/li>\n<li><a href=\"#_11\">\u4e8c\u5341\u4e00\u3001\u73af\u8def\u8865\u507f\uff1a\u4e3a\u4ec0\u4e48\u4f1a\u632f\u8361\uff0c\u600e\u6837\u9a8c\u8bc1<\/a><\/li>\n<li><a href=\"#_12\">\u4e8c\u5341\u4e8c\u3001\u542f\u52a8\u4e0e\u8f85\u52a9\u4f9b\u7535\uff1a\u4e3a\u4ec0\u4e48\u4f1a\u542f\u52a8\u4e00\u4e0b\u53c8\u505c<\/a><\/li>\n<li><a href=\"#_13\">\u4e8c\u5341\u4e09\u3001\u4fdd\u62a4\u8bbe\u8ba1\uff1a\u6b63\u5e38\u8ba1\u7b97\u4e4b\u5916\u8fd8\u8981\u8003\u8651\u5f02\u5e38\u80fd\u91cf<\/a><\/li>\n<li><a href=\"#ccm_1\">\u4e8c\u5341\u56db\u3001CCM \u5bf9\u7167\u7b97\u4f8b\uff1a\u540c\u6837\u662f\u4e94\u4f0f\u8f93\u51fa\uff0c\u8ba1\u7b97\u5982\u4f55\u6539\u53d8<\/a><\/li>\n<li><a href=\"#_14\">\u4e8c\u5341\u4e94\u3001\u635f\u8017\u4e0e\u6548\u7387\uff1a\u628a\u672a\u77e5\u9879\u5199\u51fa\u6765\u518d\u9010\u4e2a\u7f29\u5c0f<\/a><\/li>\n<li><a href=\"#pcb\">\u4e8c\u5341\u516d\u3001PCB \u5e03\u5c40\uff1a\u4e09\u4e2a\u9ad8\u9891\u56de\u8def\u548c\u4e00\u6761\u9694\u79bb\u8fb9\u754c<\/a><\/li>\n<li><a href=\"#_15\">\u4e8c\u5341\u4e03\u3001\u4ece\u7b2c\u4e00\u6b21\u4e0a\u7535\u5230\u6ee1\u8f7d\u9a8c\u8bc1\u7684\u6b65\u9aa4<\/a><\/li>\n<li><a href=\"#_16\">\u4e8c\u5341\u516b\u3001\u5e38\u89c1\u6545\u969c\uff1a\u4ece\u73b0\u8c61\u56de\u5230\u6ce2\u5f62\u4e0e\u6a21\u578b<\/a><\/li>\n<li><a href=\"#5-v2-a\">\u4e8c\u5341\u4e5d\u3001\u4ece5 V\/2 A\u6539\u6210\u5176\u4ed6\u7535\u6d41\uff0c\u54ea\u4e9b\u53c2\u6570\u5fc5\u987b\u91cd\u7b97<\/a><\/li>\n<li><a href=\"#_17\">\u4e09\u5341\u3001\u8bbe\u8ba1\u4ea4\u4ed8\u8868\uff1a\u628a\u516c\u5f0f\u7ed3\u679c\u53d8\u6210\u53ef\u590d\u73b0\u89c4\u683c<\/a><\/li>\n<li><a href=\"#_18\">\u4e09\u5341\u4e00\u3001\u7ec3\u4e60\u4e0e\u7b54\u6848\uff1a\u68c0\u67e5\u662f\u5426\u771f\u6b63\u7406\u89e3\u53cd\u6fc0<\/a><\/li>\n<li><a href=\"#_25\">\u53c2\u8003\u8d44\u6599\u4e0e\u9605\u8bfb\u65b9\u5f0f<\/a><\/li>\n<\/ul>\n<\/div>\n<h2 id=\"_1\">\u4e00\u3001\u53cd\u6fc0\u5230\u5e95\u662f\u4ec0\u4e48\uff1a\u5148\u7406\u89e3\u80fd\u91cf\u7684\u65f6\u95f4\u987a\u5e8f<\/h2>\n<h3 id=\"11\">1.1 \u5bfc\u901a\u50a8\u80fd\uff0c\u5173\u65ad\u9001\u80fd<\/h3>\n<p>\u53cd\u6fc0\u6700\u6838\u5fc3\u7684\u7279\u70b9\u662f\uff1a\u4e3b\u5f00\u5173\u5bfc\u901a\u65f6\uff0c\u8f93\u5165\u7535\u6e90\u4e3b\u8981\u5411\u78c1\u4ef6\u7684\u52b1\u78c1\u7535\u611f\u5145\u80fd\uff1b\u4e3b\u5f00\u5173\u5173\u65ad\u540e\uff0c\u78c1\u4ef6\u901a\u8fc7\u6b21\u7ea7\u6574\u6d41\u5668\u5411\u8f93\u51fa\u91ca\u653e\u80fd\u91cf\u3002\u521d\u7ea7\u4e0e\u6b21\u7ea7\u7684\u4e3b\u8981\u529f\u7387\u7535\u6d41\u5728\u65f6\u95f4\u4e0a\u4ea4\u66ff\u51fa\u73b0\u3002\u8fd9\u4e2a\u7279\u70b9\u4f7f\u53cd\u6fc0\u4e0d\u9700\u8981\u50cf\u6b63\u6fc0\u90a3\u6837\u5728\u6b21\u7ea7\u53e6\u5916\u5b89\u6392\u4e00\u4e2a\u4e3b\u8981\u50a8\u80fd\u8f93\u51fa\u7535\u611f\uff0c\u4f46\u4e5f\u4f7f\u6b21\u7ea7\u7535\u6d41\u5f88\u8109\u51b2\u5316\uff0c\u8f93\u51fa\u7535\u5bb9\u5fc5\u987b\u627f\u53d7\u660e\u663e\u7684\u5145\u653e\u7535\u7535\u6d41\u3002<\/p>\n<p>\u53ef\u4ee5\u628a\u53cd\u6fc0\u60f3\u6210\u4e24\u4e2a\u4ea4\u66ff\u5de5\u4f5c\u7684\u52a8\u4f5c\uff1a\u5148\u628a\u8f93\u5165\u80fd\u91cf\u88c5\u8fdb\u4e00\u4e2a\u78c1\u573a\u201c\u50a8\u80fd\u5bb9\u5668\u201d\uff0c\u518d\u8ba9\u5bb9\u5668\u901a\u8fc7\u53e6\u4e00\u7ec4\u7ed5\u7ec4\u628a\u80fd\u91cf\u9001\u7ed9\u8d1f\u8f7d\u3002\u8fd9\u4e2a\u6bd4\u55bb\u53ea\u80fd\u8bf4\u660e\u65f6\u95f4\u5173\u7cfb\uff0c\u5b9e\u9645\u50a8\u80fd\u4e0d\u662f\u628a\u7535\u8377\u88c5\u8fdb\u78c1\u82af\uff0c\u80fd\u91cf\u5b58\u5728\u78c1\u573a\u4e2d\uff0c\u800c\u4e14\u5e26\u6c14\u9699\u94c1\u6c27\u4f53\u78c1\u4ef6\u7684\u4e3b\u8981\u50a8\u80fd\u533a\u57df\u901a\u5e38\u662f\u6c14\u9699\u3002<\/p>\n<h3 id=\"12\">1.2 \u4e3a\u4ec0\u4e48\u53eb\u53d8\u538b\u5668\uff0c\u5374\u6309\u8026\u5408\u7535\u611f\u6765\u7b97<\/h3>\n<p>\u666e\u901a\u4f20\u80fd\u53d8\u538b\u5668\u901a\u5e38\u5e0c\u671b\u52b1\u78c1\u7535\u611f\u5c3d\u53ef\u80fd\u5927\uff0c\u907f\u514d\u989d\u5916\u52b1\u78c1\u7535\u6d41\u5360\u7528\u5f00\u5173\u4e0e\u94dc\u7ebf\u5bb9\u91cf\u3002\u53cd\u6fc0\u5219\u4e3b\u52a8\u5229\u7528\u52b1\u78c1\u7535\u611f\u50a8\u80fd\uff0c\u56e0\u6b64\u5fc5\u987b\u540c\u65f6\u6307\u5b9a\u531d\u6bd4\u3001\u52b1\u78c1\u7535\u611f\u3001\u5cf0\u503c\u7535\u6d41\u548c\u50a8\u80fd\u80fd\u529b\u3002\u53ea\u7ed9\u201c\u521d\u7ea7\u4e8c\u5341\u531d\u3001\u6b21\u7ea7\u5341\u531d\u201d\uff0c\u4e0d\u80fd\u786e\u5b9a\u4e00\u53ea\u53cd\u6fc0\u78c1\u4ef6\u80fd\u8f93\u51fa\u591a\u5c11\u529f\u7387\u3002<\/p>\n<p>\u672c\u6587\u4ecd\u6cbf\u7528\u884c\u4e1a\u91cc\u7684\u201c\u53cd\u6fc0\u53d8\u538b\u5668\u201d\u540d\u79f0\uff0c\u4f46\u8ba1\u7b97\u65f6\u628a\u5b83\u89c6\u4f5c\u591a\u7ed5\u7ec4\u8026\u5408\u7535\u611f\u3002\u78c1\u82af\u8d1f\u8d23\u5efa\u7acb\u4f4e\u78c1\u963b\u8def\u5f84\uff0c\u4f7f\u4e0d\u540c\u7ed5\u7ec4\u6709\u6548\u8026\u5408\uff1b\u6c14\u9699\u4f7f\u78c1\u4ef6\u80fd\u5728\u8f83\u5927\u7684\u5b89\u531d\u4e0b\u50a8\u80fd\uff1b\u7ed5\u7ec4\u51b3\u5b9a\u78c1\u901a\u94fe\u63a5\u3001\u94dc\u635f\u548c\u5bc4\u751f\u53c2\u6570\u3002\u8fd9\u4e2a\u8ba4\u8bc6\u80fd\u591f\u89e3\u91ca\u4e3a\u4f55\u540c\u6837\u531d\u6570\u7684\u65e0\u6c14\u9699\u78c1\u82af\u4e0e\u5e26\u6c14\u9699\u78c1\u82af\u8868\u73b0\u5dee\u522b\u5f88\u5927\u3002<\/p>\n<h3 id=\"13\">1.3 \u4e3a\u4ec0\u4e48\u53cd\u6fc0\u80fd\u5347\u538b\uff0c\u4e5f\u80fd\u964d\u538b<\/h3>\n<p>\u8f93\u51fa\u4e0d\u4ec5\u7531\u531d\u6bd4\u51b3\u5b9a\uff0c\u8fd8\u53d6\u51b3\u4e8e\u5f00\u5173\u65f6\u5e8f\u4ee5\u53ca\u5de5\u4f5c\u6a21\u5f0f\u3002\u6b21\u7ea7\u5173\u65ad\u65f6\u4e0d\u627f\u53d7\u8f93\u51fa\u4f20\u80fd\u7535\u6d41\uff0c\u521d\u7ea7\u5bfc\u901a\u671f\u95f4\u78c1\u573a\u79ef\u7d2f\u80fd\u91cf\uff1b\u5173\u65ad\u65f6\u78c1\u573a\u4e3a\u4fdd\u6301\u7535\u6d41\u8fde\u7eed\u800c\u6539\u53d8\u7ed5\u7ec4\u7535\u538b\u6781\u6027\uff0c\u5efa\u7acb\u8db3\u4ee5\u8ba9\u6b21\u7ea7\u4e8c\u6781\u7ba1\u5bfc\u901a\u7684\u7535\u538b\u3002\u531d\u6bd4\u7ed9\u4e24\u4e2a\u7ed5\u7ec4\u7535\u538b\u5efa\u7acb\u6bd4\u4f8b\u5173\u7cfb\uff0c\u63a7\u5236\u5668\u901a\u8fc7\u8109\u5bbd\u3001\u5cf0\u503c\u7535\u6d41\u6216\u9891\u7387\u63a7\u5236\u6bcf\u79d2\u9001\u51fa\u7684\u80fd\u91cf\u3002<\/p>\n<p>\u56e0\u6b64\u53cd\u6fc0\u4e0d\u662f\u628a\u76f4\u6d41\u4e8c\u5341\u56db\u4f0f\u76f4\u63a5\u201c\u53d8\u538b\u201d\u4e3a\u5341\u4e8c\u4f0f\u3002\u5b83\u5148\u5c06\u76f4\u6d41\u5207\u6210\u8109\u51b2\uff0c\u518d\u901a\u8fc7\u78c1\u4ef6\u548c\u6574\u6d41\u6ee4\u6ce2\u5f97\u5230\u76f4\u6d41\u8f93\u51fa\u3002\u540c\u6837\u7684\u7ed5\u7ec4\u6bd4\u4f8b\u5728\u4e0d\u540c\u63a7\u5236\u548c\u8d1f\u8f7d\u6761\u4ef6\u4e0b\uff0c\u53ef\u4ee5\u5f97\u5230\u4e0d\u540c\u8f93\u51fa\uff1b\u4e0d\u80fd\u8131\u79bb\u63a7\u5236\u6761\u4ef6\u5355\u72ec\u4f7f\u7528\u7406\u60f3\u53d8\u538b\u5668\u7535\u538b\u6bd4\u3002<\/p>\n<h3 id=\"14\">1.4 \u9002\u5408\u4ec0\u4e48\u5e94\u7528\uff0c\u9650\u5236\u5728\u54ea\u91cc<\/h3>\n<p>\u53cd\u6fc0\u9002\u5408\u9700\u8981\u9694\u79bb\u3001\u529f\u7387\u4e0d\u7279\u522b\u5927\u3001\u6210\u672c\u4e0e\u5143\u4ef6\u6570\u91cf\u654f\u611f\u7684\u7535\u6e90\uff0c\u4f8b\u5982\u8f85\u52a9\u7535\u6e90\u3001\u5de5\u4e1a\u9694\u79bb\u6a21\u5757\u3001\u5c0f\u578b\u9002\u914d\u5668\u548c\u591a\u8def\u8f85\u52a9\u8f93\u51fa\u3002\u5b83\u7684\u4f18\u52bf\u5305\u62ec\u4e00\u4e2a\u4e3b\u8981\u5f00\u5173\u3001\u6613\u4e8e\u589e\u52a0\u6b21\u7ea7\u3001\u8f93\u5165\u8f93\u51fa\u53ef\u5347\u53ef\u964d\u4ee5\u53ca\u63a7\u5236\u65b9\u5f0f\u4e30\u5bcc\u3002\u4ee3\u4ef7\u5305\u62ec\u8f83\u9ad8\u5cf0\u503c\u7535\u6d41\u3001\u6f0f\u611f\u5c16\u5cf0\u3001\u8109\u51b2\u6574\u6d41\u7535\u6d41\u3001\u78c1\u4ef6\u635f\u8017\u548c\u5171\u6a21\u5e72\u6270\u3002<\/p>\n<p>\u529f\u7387\u8fb9\u754c\u4e0d\u80fd\u7b80\u5355\u5199\u6210\u201c\u8d85\u8fc7\u67d0\u4e2a\u56fa\u5b9a\u74e6\u6570\u5c31\u4e0d\u80fd\u7528\u201d\u3002\u9891\u7387\u3001\u8f93\u5165\u8303\u56f4\u3001\u6563\u70ed\u3001\u540c\u6b65\u6574\u6d41\u3001\u6709\u6e90\u94b3\u4f4d\u4e0e\u6750\u6599\u90fd\u4f1a\u6539\u53d8\u53ef\u884c\u8303\u56f4\u3002\u5b9e\u9645\u9009\u578b\u5e94\u6bd4\u8f83\u78c1\u4ef6\u5c3a\u5bf8\u3001\u6548\u7387\u3001\u6e29\u5347\u3001EMI \u548c\u6210\u672c\u3002\u5982\u679c\u4e3a\u4e86\u63d0\u9ad8\u529f\u7387\u88ab\u8feb\u4f7f\u7528\u5f88\u5927\u7684\u5cf0\u503c\u7535\u6d41\u3001\u91cd\u5ea6\u94b3\u4f4d\u635f\u8017\u548c\u590d\u6742\u6563\u70ed\uff0c\u6865\u5f0f\u6216\u8c10\u632f\u65b9\u6848\u53ef\u80fd\u66f4\u5408\u9002\u3002<\/p>\n<h2 id=\"_2\">\u4e8c\u3001\u57fa\u672c\u7535\u8def\u62d3\u6251\uff1a\u628a\u6bcf\u4e2a\u5668\u4ef6\u653e\u56de\u5b83\u7684\u4f5c\u7528<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-02-topology.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u5355\u7ba1\u53cd\u6fc0\u57fa\u672c\u62d3\u6251\u3001\u9694\u79bb\u8fb9\u754c\u3001\u540c\u540d\u7aef\u4e0e\u4fe1\u53f7\u65b9\u5411\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-02-topology.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"21-mosfet\">2.1 \u4e00\u6b21\u4fa7\uff1a\u8f93\u5165\u7535\u5bb9\u3001\u521d\u7ea7\u3001MOSFET \u4e0e\u91c7\u6837\u7535\u963b<\/h3>\n<p>\u57fa\u672c\u4f4e\u8fb9\u5f00\u5173\u7ed3\u6784\u4e3a\uff1a\u8f93\u5165\u6b63\u6781\u8fde\u63a5\u521d\u7ea7\u70b9\u7aef\uff0c\u521d\u7ea7\u975e\u70b9\u7aef\u8fde\u63a5 MOSFET \u6f0f\u6781\uff0cMOSFET \u6e90\u6781\u7ecf\u8fc7\u7535\u6d41\u91c7\u6837\u7535\u963b\u8fd4\u56de\u4e00\u6b21\u4fa7\u5730\u3002\u8f93\u5165\u7535\u5bb9\u8de8\u63a5\u8f93\u5165\u6b63\u8d1f\u7aef\uff0c\u627f\u62c5\u5c40\u90e8\u9ad8\u9891\u8109\u51b2\u7535\u6d41\u3002\u6805\u6781\u7531\u63a7\u5236\u5668\u9a71\u52a8\uff0c\u9a71\u52a8\u7535\u538b\u76f8\u5bf9\u4e8e\u6e90\u6781\u5b9a\u4e49\uff0c\u800c\u4e0d\u662f\u76f8\u5bf9\u4e8e\u4efb\u4f55\u4e00\u4e2a\u8fdc\u5904\u7684\u5730\u3002<\/p>\n<p>\u91c7\u6837\u7535\u963b\u4e0d\u662f\u989d\u5916\u7684\u8d1f\u8f7d\u7535\u963b\uff0c\u5b83\u628a\u4e3b\u5f00\u5173\u7535\u6d41\u53d8\u6210\u63a7\u5236\u5668\u53ef\u8bfb\u53d6\u7684\u7535\u538b\u3002\u63a7\u5236\u5668\u770b\u5230\u91c7\u6837\u7535\u538b\u8fbe\u5230\u8bbe\u5b9a\u9608\u503c\uff0c\u5c31\u7ed3\u675f\u672c\u5468\u671f\u5bfc\u901a\u3002\u67d0\u4e9b\u96c6\u6210\u63a7\u5236\u5668\u91c7\u7528\u5185\u90e8\u91c7\u6837\u6216\u7535\u6d41\u4f30\u7b97\uff0c\u4e0d\u4e00\u5b9a\u6709\u5916\u7f6e\u91c7\u6837\u7535\u963b\uff0c\u4f46\u7535\u6d41\u9650\u5236\u7684\u529f\u80fd\u4ecd\u5b58\u5728\u3002<\/p>\n<h3 id=\"22\">2.2 \u4e8c\u6b21\u4fa7\uff1a\u7ed5\u7ec4\u3001\u6574\u6d41\u4e8c\u6781\u7ba1\u3001\u8f93\u51fa\u7535\u5bb9\u4e0e\u8d1f\u8f7d<\/h3>\n<p>\u672c\u6587\u57fa\u672c\u56fe\u5c06\u6b21\u7ea7\u70b9\u7aef\u63a5\u8f93\u51fa\u8d1f\u7aef\uff0c\u975e\u70b9\u7aef\u63a5\u6574\u6d41\u4e8c\u6781\u7ba1\u9633\u6781\uff0c\u4e8c\u6781\u7ba1\u9634\u6781\u63a5\u8f93\u51fa\u6b63\u7aef\u3002\u8fd9\u6837\u521d\u7ea7\u70b9\u7aef\u4e3a\u6b63\u65f6\uff0c\u6b21\u7ea7\u70b9\u7aef\u4e5f\u4e3a\u6b63\uff0c\u6b21\u7ea7\u975e\u70b9\u7aef\u76f8\u5bf9\u8f93\u51fa\u8d1f\u7aef\u53d8\u8d1f\uff0c\u6574\u6d41\u5668\u622a\u6b62\uff1b\u521d\u7ea7\u5173\u65ad\u540e\u7ed5\u7ec4\u7535\u538b\u53cd\u5411\uff0c\u6b21\u7ea7\u975e\u70b9\u7aef\u53d8\u6b63\uff0c\u6574\u6d41\u5668\u5bfc\u901a\u5e76\u7ed9\u8f93\u51fa\u4f9b\u7535\u3002<\/p>\n<p>\u8f93\u51fa\u7535\u5bb9\u4e0d\u662f\u53ea\u7528\u4e8e\u53bb\u6389\u4e00\u70b9\u5c0f\u7eb9\u6ce2\u3002\u5728\u4e3b\u5f00\u5173\u5bfc\u901a\u548c DCM \u7a7a\u95f2\u533a\u95f4\uff0c\u5b83\u72ec\u7acb\u5411\u8d1f\u8f7d\u4f9b\u7535\uff1b\u6b21\u7ea7\u9001\u80fd\u65f6\uff0c\u5b83\u5438\u6536\u8d85\u8fc7\u8d1f\u8f7d\u7535\u6d41\u7684\u90a3\u90e8\u5206\u3002\u8f93\u51fa\u7535\u5bb9\u7684\u5bb9\u91cf\u3001ESR\u3001\u7eb9\u6ce2\u7535\u6d41\u989d\u5b9a\u503c\u3001\u76f4\u6d41\u504f\u538b\u548c\u6e29\u5ea6\u5bff\u547d\u90fd\u4f1a\u5f71\u54cd\u7535\u6e90\u8868\u73b0\u3002<\/p>\n<h3 id=\"23\">2.3 \u4e24\u4e2a\u5730\u4e0d\u80fd\u968f\u610f\u8fde\u8d77\u6765<\/h3>\n<p>\u4e00\u6b21\u4fa7\u5730\u662f\u8f93\u5165\u4e0e\u63a7\u5236\u5668\u7684\u7535\u6d41\u8fd4\u56de\u70b9\uff0c\u4e8c\u6b21\u4fa7\u5730\u662f\u8d1f\u8f7d\u8fd4\u56de\u70b9\u3002\u9694\u79bb\u578b\u53cd\u6fc0\u4f9d\u9760\u78c1\u4ef6\u7edd\u7f18\u548c\u53cd\u9988\u9694\u79bb\u4fdd\u6301\u8fd9\u4e24\u4e2a\u533a\u57df\u5206\u5f00\u3002\u666e\u901a\u5bfc\u7ebf\u3001\u793a\u6ce2\u5668\u5730\u5939\u6216\u9519\u8bef\u8de8\u533a\u94dc\u76ae\u90fd\u53ef\u80fd\u7834\u574f\u9694\u79bb\u3002\u82e5\u8bbe\u8ba1\u9700\u8981 Y \u7535\u5bb9\uff0c\u5b83\u63d0\u4f9b\u7684\u662f\u7ecf\u8bbe\u8ba1\u7684\u9ad8\u9891\u8def\u5f84\uff0c\u5e76\u4e0d\u7b49\u4e8e\u628a\u4e24\u4e2a\u5730\u77ed\u63a5\u3002<\/p>\n<p>\u5b9e\u9a8c\u65f6\u4e5f\u8981\u6ce8\u610f\uff1a\u6709\u4e9b\u53f0\u5f0f\u7535\u6e90\u3001\u7535\u5b50\u8d1f\u8f7d\u3001\u793a\u6ce2\u5668\u548c USB \u8fde\u63a5\u7684\u8bbe\u5907\u5df2\u7ecf\u901a\u8fc7\u4fdd\u62a4\u5730\u4e92\u76f8\u8fde\u63a5\u3002\u56fe\u7eb8\u4e0a\u4e24\u4e2a\u5730\u5206\u5f00\uff0c\u4e0d\u4ee3\u8868\u63a5\u5b8c\u6240\u6709\u4eea\u5668\u4ee5\u540e\u4ecd\u7136\u5206\u5f00\u3002\u6d4b\u91cf\u524d\u5e94\u786e\u8ba4\u6574\u4e2a\u6d4b\u8bd5\u7cfb\u7edf\u7684\u63a5\u5730\u5173\u7cfb\u3002<\/p>\n<h3 id=\"24\">2.4 \u5b9e\u7528\u7535\u8def\u6bd4\u57fa\u672c\u62d3\u6251\u591a\u54ea\u4e9b\u90e8\u5206<\/h3>\n<p>\u5b8c\u6574\u53cd\u6fc0\u4e00\u822c\u8fd8\u5305\u542b\u542f\u52a8\u4e0e\u8f85\u52a9\u4f9b\u7535\u3001\u6805\u6781\u7535\u963b\u3001\u91c7\u6837\u6ee4\u6ce2\u3001\u6f0f\u611f\u94b3\u4f4d\u3001\u8f93\u51fa\u53cd\u9988\u3001\u8fc7\u6d41\u3001\u8fc7\u538b\u3001\u6b20\u538b\u9501\u5b9a\u548c\u6e29\u5ea6\u4fdd\u62a4\u3002\u8f93\u5165\u4fa7\u53ef\u80fd\u6709\u53cd\u63a5\u4fdd\u62a4\u3001\u6d6a\u6d8c\u4fdd\u62a4\u3001EMI \u6ee4\u6ce2\u548c\u5927\u5bb9\u91cf\u50a8\u80fd\u7535\u5bb9\u3002\u4e8c\u6b21\u4fa7\u53ef\u80fd\u6709\u540c\u6b65\u6574\u6d41\u3001\u540e\u7ea7\u6ee4\u6ce2\u548c\u8d1f\u8f7d\u77ac\u6001\u5904\u7406\u3002<\/p>\n<p>\u7406\u89e3\u57fa\u672c\u62d3\u6251\u4ee5\u540e\uff0c\u518d\u9010\u9879\u52a0\u5165\u8fd9\u4e9b\u6a21\u5757\uff0c\u624d\u80fd\u77e5\u9053\u6bcf\u4e2a\u5143\u4ef6\u89e3\u51b3\u54ea\u4e2a\u95ee\u9898\u3002\u76f4\u63a5\u7167\u6284\u4e00\u5f20\u51e0\u5341\u4e2a\u5143\u4ef6\u7684\u539f\u7406\u56fe\uff0c\u5f80\u5f80\u4f1a\u628a\u94b3\u4f4d\u7535\u963b\u3001\u542f\u52a8\u7535\u963b\u548c\u53cd\u9988\u7535\u963b\u6df7\u4e3a\u4e00\u8c08\uff1b\u672c\u6587\u540e\u7eed\u5c06\u628a\u5b83\u4eec\u5206\u522b\u8ba1\u7b97\u3002<\/p>\n<h2 id=\"_3\">\u4e09\u3001\u4e00\u4e2a\u5f00\u5173\u5468\u671f\u91cc\u7684\u4e09\u4e2a\u9636\u6bb5<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-03-stages.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u5bfc\u901a\u50a8\u80fd\u3001\u5173\u65ad\u9001\u80fd\u548cDCM\u7a7a\u95f2\u9636\u6bb5\u7684\u7535\u6d41\u8def\u5f84\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-03-stages.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"31-mosfet\">3.1 \u9636\u6bb5\u4e00\uff1aMOSFET \u5bfc\u901a<\/h3>\n<p>\u5bfc\u901a\u65f6\u7535\u6d41\u8def\u5f84\u4e3a\u8f93\u5165\u7535\u5bb9\u6b63\u7aef\u3001\u521d\u7ea7\u7ed5\u7ec4\u3001MOSFET\u3001\u91c7\u6837\u7535\u963b\u3001\u8f93\u5165\u7535\u5bb9\u8d1f\u7aef\u3002\u5ffd\u7565\u5668\u4ef6\u548c\u94dc\u7ebf\u538b\u964d\uff0c\u521d\u7ea7\u627f\u53d7\u6b63\u5411 Vin\uff0c\u52b1\u78c1\u7535\u6d41\u6309 Vin\/Lm \u7684\u659c\u7387\u589e\u52a0\u3002\u6b21\u7ea7\u6574\u6d41\u4e8c\u6781\u7ba1\u56e0\u7ed5\u7ec4\u6781\u6027\u800c\u622a\u6b62\uff0c\u8f93\u51fa\u8d1f\u8f7d\u6682\u65f6\u7531\u8f93\u51fa\u7535\u5bb9\u4f9b\u7535\u3002<\/p>\n<p>\u8fd9\u4e2a\u9636\u6bb5\u521d\u7ea7\u7535\u6d41\u4e0d\u4e00\u5b9a\u4ece\u96f6\u5f00\u59cb\u3002\u5982\u679c\u4e0a\u5468\u671f\u5b8c\u5168\u9000\u78c1\uff0cDCM \u7684\u8d77\u70b9\u7ea6\u4e3a\u96f6\uff1b\u5982\u679c\u78c1\u573a\u80fd\u91cf\u8fd8\u6ca1\u91ca\u653e\u5b8c\uff0cCCM \u7684\u8d77\u70b9\u5c31\u662f\u975e\u96f6\u8c37\u503c\u3002\u4e0d\u80fd\u56e0\u4e3a MOSFET \u4e0a\u5468\u671f\u5df2\u7ecf\u5173\u65ad\uff0c\u5c31\u8ba4\u4e3a\u4e0b\u4e00\u6b21\u5bfc\u901a\u7535\u6d41\u4e00\u5b9a\u4ece\u96f6\u5f00\u59cb\u3002<\/p>\n<h3 id=\"32-mosfet\">3.2 \u9636\u6bb5\u4e8c\uff1aMOSFET \u5173\u65ad\uff0c\u6b21\u7ea7\u9001\u80fd<\/h3>\n<p>\u5173\u65ad\u77ac\u95f4\uff0c\u52b1\u78c1\u7535\u6d41\u5bf9\u5e94\u7684\u78c1\u901a\u4e0d\u80fd\u65e0\u7f18\u65e0\u6545\u8df3\u53d8\u3002\u7ed5\u7ec4\u7535\u538b\u53cd\u5411\uff0c\u6b21\u7ea7\u4e8c\u6781\u7ba1\u5bfc\u901a\uff0c\u78c1\u4ef6\u4ee5\u6b21\u7ea7\u7535\u6d41\u5f62\u5f0f\u628a\u80fd\u91cf\u9001\u5411\u8f93\u51fa\u3002\u7406\u60f3\u60c5\u51b5\u4e0b\uff0c\u521a\u5f00\u59cb\u7684\u6b21\u7ea7\u7535\u6d41\u7b49\u4e8e\u521d\u7ea7\u5173\u65ad\u7535\u6d41\u4e58\u4ee5 Np\/Ns\u3002\u7531\u4e8e\u5b9e\u9645\u5b58\u5728\u6f0f\u611f\uff0c\u521d\u7ea7\u7535\u6d41\u5411\u6b21\u7ea7\u8f6c\u79fb\u9700\u8981\u77ed\u6682\u6362\u6d41\uff0c\u5e76\u5f62\u6210\u6f0f\u6781\u5c16\u5cf0\u3002<\/p>\n<p>\u521d\u7ea7\u7aef\u53e3\u6b64\u65f6\u6ca1\u6709\u7a33\u6001\u4f20\u80fd\u7535\u6d41\uff0c\u4f46\u521d\u7ea7\u7ed5\u7ec4\u4ecd\u5b58\u5728\u7531\u6b21\u7ea7\u7535\u538b\u53cd\u5c04\u5f62\u6210\u7684\u8d1f\u7535\u538b\u3002MOSFET \u6f0f\u6781\u5e73\u53f0\u5347\u5230\u8f93\u5165\u7535\u538b\u52a0\u53cd\u5c04\u7535\u538b\uff0c\u6f0f\u611f\u5c16\u5cf0\u8fd8\u4f1a\u53e0\u52a0\u5728\u8fd9\u4e2a\u5e73\u53f0\u4e4b\u4e0a\u3002\u4e0d\u8981\u628a\u201c\u521d\u7ea7\u6ca1\u6709\u7535\u6d41\u201d\u7406\u89e3\u6210\u201c\u521d\u7ea7\u6ca1\u6709\u7535\u538b\u201d\u3002<\/p>\n<h3 id=\"33-dcm\">3.3 \u9636\u6bb5\u4e09\uff1aDCM \u7684\u7a7a\u95f2\u4e0e\u632f\u94c3<\/h3>\n<p>\u5982\u679c\u6b21\u7ea7\u7535\u6d41\u5728\u672c\u5468\u671f\u7ed3\u675f\u524d\u964d\u5230\u96f6\uff0c\u5c31\u8fdb\u5165\u7a7a\u95f2\u9636\u6bb5\u3002\u7406\u60f3\u6a21\u578b\u91cc\u8fd9\u65f6\u6ca1\u6709\u52b1\u78c1\u4f20\u80fd\u7535\u6d41\uff0c\u8f93\u51fa\u7ee7\u7eed\u7531\u7535\u5bb9\u4f9b\u7535\uff1b\u5b9e\u9645\u7535\u8def\u4e2d\u52b1\u78c1\u7535\u611f\u3001\u6f0f\u611f\u3001MOSFET \u8f93\u51fa\u7535\u5bb9\u548c\u7ed5\u7ec4\u7535\u5bb9\u4f1a\u4ea7\u751f\u632f\u94c3\uff0c\u6f0f\u6781\u51fa\u73b0\u591a\u4e2a\u8c37\u5e95\u3002\u51c6\u8c10\u632f\u63a7\u5236\u5668\u53ef\u80fd\u5229\u7528\u8fd9\u4e9b\u8c37\u5e95\u9009\u62e9\u4e0b\u4e00\u6b21\u5f00\u901a\u3002<\/p>\n<p>\u7a7a\u95f2\u6bb5\u5e76\u4e0d\u662f\u6ce2\u5f62\u201c\u574f\u4e86\u201d\u7684\u8bc1\u636e\uff0c\u4e5f\u4e0d\u662f\u6240\u6709\u632f\u94c3\u90fd\u9700\u8981\u540c\u4e00\u53ea RC \u5438\u6536\u3002\u9000\u78c1\u7ed3\u675f\u540e\u7684\u4f4e\u9891\u632f\u94c3\u4e0e\u521a\u5173\u65ad\u65f6\u7684\u9ad8\u9891\u6f0f\u611f\u5c16\u5cf0\u673a\u5236\u4e0d\u540c\uff0c\u5e94\u5148\u901a\u8fc7\u65f6\u95f4\u4f4d\u7f6e\u548c\u9891\u7387\u5206\u8fa8\uff0c\u518d\u51b3\u5b9a\u5904\u7406\u65b9\u5f0f\u3002<\/p>\n<h3 id=\"34\">3.4 \u4ece\u6ce2\u5f62\u5224\u65ad\u9636\u6bb5\uff0c\u4e0d\u53ea\u770b\u6805\u6781<\/h3>\n<p>\u6805\u6781\u9ad8\u7535\u5e73\u53ef\u4ee5\u544a\u8bc9\u4f60\u4e3b\u5f00\u5173\u7684\u5bfc\u901a\u533a\u95f4\uff0c\u5374\u4e0d\u80fd\u76f4\u63a5\u544a\u8bc9\u4f60\u6b21\u7ea7\u9000\u78c1\u4ec0\u4e48\u65f6\u5019\u7ed3\u675f\u3002\u89c2\u5bdf\u6f0f\u6781\u5e73\u53f0\u7ed3\u675f\u4f4d\u7f6e\u3001\u6b21\u7ea7\u6574\u6d41\u7535\u6d41\u4e0b\u964d\u5230\u96f6\u7684\u65f6\u523b\u548c\u8f85\u52a9\u7ed5\u7ec4\u7535\u538b\uff0c\u624d\u80fd\u786e\u5b9a\u5b9e\u9645\u5de5\u4f5c\u6a21\u5f0f\u3002\u63a7\u5236\u5668\u65f6\u949f\u56fa\u5b9a\u4e0d\u4ee3\u8868\u6bcf\u5468\u671f\u4e00\u5b9a\u5f00\u901a\uff0c\u8f7b\u8f7d\u65f6\u53ef\u80fd\u8df3\u8109\u51b2\u6216\u6210\u7ec4\u5de5\u4f5c\u3002<\/p>\n<p>\u521d\u5b66\u8c03\u8bd5\u6700\u597d\u540c\u65f6\u8bb0\u5f55\u6805\u6781\u3001\u6f0f\u6781\u3001\u7535\u6d41\u91c7\u6837\u548c\u8f93\u51fa\u7eb9\u6ce2\uff1b\u5982\u679c\u53ea\u6709\u4e24\u4e2a\u901a\u9053\uff0c\u5e94\u5206\u51e0\u6b21\u5728\u540c\u4e00\u7a33\u5b9a\u6761\u4ef6\u4e0b\u6d4b\u91cf\u3002\u5bf9\u9f50\u65f6\u95f4\u5750\u6807\u540e\uff0c\u628a\u6bcf\u6bb5\u6ce2\u5f62\u653e\u56de\u5bfc\u901a\u3001\u9001\u80fd\u3001\u7a7a\u95f2\u4e09\u9636\u6bb5\uff0c\u95ee\u9898\u5c31\u5bb9\u6613\u5b9a\u4f4d\u3002<\/p>\n<h2 id=\"_4\">\u56db\u3001\u7b26\u53f7\u3001\u65b9\u5411\u4e0e\u5355\u4f4d\uff1a\u5148\u6d88\u9664\u8ba1\u7b97\u6b67\u4e49<\/h2>\n<h3 id=\"41\">4.1 \u672c\u6587\u7edf\u4e00\u7684\u531d\u6bd4\u5b9a\u4e49<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>n = N<sub>p<\/sub>\/N<sub>s<\/sub>\uff1b\u3000V<sub>o<\/sub>\u2032 = V<sub>o<\/sub> + V<sub>F<\/sub>\uff1b\u3000V<sub>R<\/sub> = nV<sub>o<\/sub>\u2032<\/strong><\/p>\n<p>\u6709\u4e9b\u8d44\u6599\u91c7\u7528 Ns\/Np\uff0c\u548c\u672c\u6587\u6070\u597d\u4e92\u4e3a\u5012\u6570\u3002\u540e\u9762\u7684\u53cd\u5c04\u7535\u538b\u3001\u4e8c\u6781\u7ba1\u8010\u538b\u3001\u6b21\u7ea7\u5cf0\u503c\u548c\u53f3\u534a\u5e73\u9762\u96f6\u70b9\u90fd\u4f9d\u8d56\u8fd9\u4e2a\u5b9a\u4e49\u3002\u9605\u8bfb\u5916\u90e8\u516c\u5f0f\u65f6\u5148\u5199\u6e05 n \u7684\u65b9\u5411\uff0c\u518d\u8f6c\u6362\uff0c\u4e0d\u80fd\u53ea\u770b\u5230\u5b57\u6bcd\u76f8\u540c\u5c31\u76f4\u63a5\u4f7f\u7528\u3002<\/p>\n<p>Vo\u2032 \u8868\u793a\u6b21\u7ea7\u5728\u5bfc\u901a\u9001\u80fd\u671f\u95f4\uff0c\u7ed5\u7ec4\u9700\u8981\u652f\u6301\u7684\u8fd1\u4f3c\u7535\u538b\uff0c\u5305\u542b\u6574\u6d41\u5668\u538b\u964d\u3002\u8fdb\u4e00\u6b65\u7cbe\u7b97\u65f6\u8fd8\u5e94\u52a0\u5165\u6b21\u7ea7\u94dc\u963b\u7b49\u538b\u964d\uff1b\u672c\u6587\u521d\u7b97\u91c7\u7528\u56fa\u5b9a VF\uff0c\u518d\u628a\u771f\u5b9e\u5668\u4ef6\u635f\u8017\u53e6\u5217\u3002VR \u662f\u6298\u7b97\u5230\u521d\u7ea7\u7684\u9001\u80fd\u7535\u538b\u5e45\u503c\uff0c\u4e0d\u662f MOSFET \u7684\u5b8c\u6574\u6f0f\u6781\u7535\u538b\u3002<\/p>\n<h3 id=\"42\">4.2 \u65f6\u95f4\u53d8\u91cf<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>T<sub>s<\/sub> = 1\/f<sub>s<\/sub>\uff1b\u3000D = t<sub>on<\/sub>\/T<sub>s<\/sub>\uff1b\u3000D<sub>2<\/sub> = t<sub>demag<\/sub>\/T<sub>s<\/sub>\uff1b\u3000D<sub>3<\/sub> = 1\u2212D\u2212D<sub>2<\/sub><\/strong><\/p>\n<p>D \u662f\u4e3b\u5f00\u5173\u5bfc\u901a\u5360\u6bd4\uff0cD2 \u662f\u6b21\u7ea7\u9001\u80fd\u5360\u6bd4\uff0cD3 \u662f\u7a7a\u95f2\u5360\u6bd4\u3002DCM \u6709 D3&gt;0\uff1b\u4e34\u754c\u72b6\u6001 D3\u22480 \u4e14\u8c37\u503c\u63a5\u8fd1\u96f6\uff1bCCM \u4e2d\u6b21\u7ea7\u9001\u80fd\u5ef6\u7eed\u5230\u4e0b\u4e00\u6b21\u5f00\u901a\uff0c\u901a\u5e38\u7528 1\u2212D \u63cf\u8ff0\u5173\u65ad\u533a\u95f4\uff0c\u4e0d\u5b58\u5728\u5b8c\u6574\u9000\u78c1\u540e\u7684\u7a7a\u95f2\u6bb5\u3002<\/p>\n<h3 id=\"43\">4.3 \u7535\u611f\u4e0e\u7535\u6d41\u53d8\u91cf<\/h3>\n<p>Lm \u662f\u6298\u7b97\u5230\u521d\u7ea7\u7684\u52b1\u78c1\u7535\u611f\uff1bLlk \u662f\u6307\u5b9a\u6d4b\u8bd5\u8fde\u63a5\u4e0b\u6298\u7b97\u5230\u521d\u7ea7\u7684\u6f0f\u611f\u3002Ipk \u4e0e Ival \u662f\u521d\u7ea7\u53c2\u8003\u52b1\u78c1\u7535\u6d41\u7684\u5cf0\u503c\u4e0e\u8c37\u503c\u3002\u5b9e\u9645 MOSFET \u7535\u6d41\u8fd8\u53ef\u80fd\u53e0\u52a0\u7535\u5bb9\u5145\u653e\u7535\u3001\u6574\u6d41\u5668\u6062\u590d\u53ca\u91c7\u6837\u632f\u94c3\uff0c\u4e0d\u80fd\u628a\u5f00\u901a\u77ac\u95f4\u7684\u5c16\u5cf0\u5168\u89c6\u4f5c\u52b1\u78c1\u7535\u6d41\u3002<\/p>\n<p>SI \u5355\u4f4d\u662f\u516c\u5f0f\u7684\u9ed8\u8ba4\u5355\u4f4d\u3002Lm \u7528\u4ea8\u5229\uff0cAe \u7528\u5e73\u65b9\u7c73\uff0ct \u7528\u79d2\u3002\u4fbf\u4e8e\u624b\u7b97\u65f6\uff0c\u4f0f\u7279\u4e58\u5fae\u79d2\u9664\u4ee5\u5e73\u65b9\u6beb\u7c73\u7684\u6362\u7b97\u521a\u597d\u62b5\u6d88\uff1b\u4f46\u7535\u611f\u4e58\u5b89\u57f9\u7684\u78c1\u5bc6\u516c\u5f0f\u5fc5\u987b\u660e\u786e\u5fae\u4ea8\u4e0e\u5e73\u65b9\u6beb\u7c73\u662f\u5426\u91c7\u7528\u76f8\u540c\u6362\u7b97\uff0c\u4e0d\u80fd\u4e00\u534a\u5199\u5fae\u5355\u4f4d\u3001\u4e00\u534a\u7528\u57fa\u672c\u5355\u4f4d\u3002<\/p>\n<h3 id=\"44\">4.4 \u7406\u60f3\u6a21\u578b\u3001\u529f\u7387\u9884\u7b97\u4e0e\u6548\u7387\u4e0d\u80fd\u6df7\u5728\u4e00\u8d77<\/h3>\n<p>\u672c\u6587\u4e3b\u7b97\u4f8b\u5148\u7528\u6b21\u7ea7\u7ed5\u7ec4\u8f93\u51fa\u529f\u7387 Vo\u2032Io \u5efa\u7acb\u80fd\u91cf\u4e00\u81f4\u7684\u7406\u60f3\u4f20\u80fd\u6a21\u578b\uff0c\u518d\u7528\u6548\u7387\u76ee\u6807\u4f30\u7b97\u4ea4\u6d41\u8f93\u5165\u4e0e\u50a8\u80fd\u7535\u5bb9\u9700\u6c42\u3002\u524d\u8005\u5305\u62ec\u5047\u8bbe\u7684\u6574\u6d41\u538b\u964d\uff0c\u540e\u8005\u5305\u62ec\u63a7\u5236\u3001\u5f00\u5173\u3001\u78c1\u4ef6\u3001\u94b3\u4f4d\u7b49\u603b\u635f\u8017\u9884\u7b97\u3002\u4e24\u8005\u4e0d\u4f1a\u88ab\u5f53\u6210\u540c\u4e00\u4e2a\u7cbe\u786e\u6570\u503c\u3002<\/p>\n<p>\u5982\u679c\u76f4\u63a5\u4ee5 Po\/\u03b7 \u4ee3\u5165\u6bcf\u5468\u671f\u50a8\u80fd\uff0c\u53c8\u7528\u7406\u60f3\u6b21\u7ea7\u7535\u6d41\u516c\u5f0f\u58f0\u79f0\u6070\u597d\u5f97\u5230\u6307\u5b9a Io\uff0c\u4f1a\u51fa\u73b0\u6570\u5b57\u4e0d\u4e00\u81f4\u3002\u6b63\u786e\u505a\u6cd5\u662f\u8bf4\u660e\u4f60\u4f7f\u7528\u7684\u662f\u4fdd\u5b88\u80fd\u91cf\u9884\u7b97\u8fd8\u662f\u65e0\u635f\u529f\u7387\u7ea7\u6a21\u578b\uff1b\u6548\u7387\u6700\u540e\u8981\u4ece\u5b9e\u9645\u635f\u8017\u548c\u6837\u673a\u6d4b\u8bd5\u786e\u8ba4\uff0c\u4e0d\u80fd\u88ab\u8bbe\u8ba1\u8005\u4efb\u610f\u6307\u5b9a\u540e\u81ea\u52a8\u6210\u7acb\u3002<\/p>\n<h2 id=\"_5\">\u4e94\u3001\u4ece\u7535\u611f\u57fa\u672c\u5b9a\u5f8b\u63a8\u5bfc\u7535\u6d41\u3001\u78c1\u5bc6\u4e0e\u50a8\u80fd<\/h2>\n<h3 id=\"51\">5.1 \u7535\u6d41\u659c\u7387<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>v = L<sub>m<\/sub>di\/dt\uff1b\u3000m<sub>on<\/sub> = V<sub>in<\/sub>\/L<sub>m<\/sub>\uff1b\u3000|m<sub>off<\/sub>| = V<sub>R<\/sub>\/L<sub>m<\/sub><\/strong><\/p>\n<p>\u4f8b\u5982 Vin=18 V\u3001Lm=12 \u03bcH\uff0c\u5bfc\u901a\u65f6\u659c\u7387\u4e3a 1.5 A\/\u03bcs\u3002\u82e5\u4ece\u96f6\u5f00\u59cb\u5bfc\u901a 4 \u03bcs\uff0c\u7535\u6d41\u589e\u52a0\u5230 6 A\u3002\u5173\u65ad\u65f6\u82e5 VR=25 V\uff0c\u6298\u7b97\u5230\u521d\u7ea7\u7684\u9000\u78c1\u659c\u7387\u5e45\u503c\u4e3a 2.083 A\/\u03bcs\u3002\u5b9e\u9645\u6b21\u7ea7\u7535\u6d41\u659c\u7387\u8fd8\u8981\u4e58 n\u3002<\/p>\n<h3 id=\"52\">5.2 \u78c1\u5bc6\u7531\u4f0f\u79d2\u51b3\u5b9a<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394B = V<sub>in<\/sub>t<sub>on<\/sub>\/(N<sub>p<\/sub>A<sub>e<\/sub>) = L<sub>m<\/sub>\u0394I\/(N<sub>p<\/sub>A<sub>e<\/sub>)<\/strong><\/p>\n<p>\u76f8\u540c Vin\u3001ton\u3001Np\u3001Ae \u4e0b\uff0c\u589e\u52a0\u6c14\u9699\u4e0d\u4f1a\u51cf\u5c11\u8fd9\u6bb5\u4f0f\u79d2\u5f15\u8d77\u7684 \u0394B\u3002\u6c14\u9699\u4f1a\u6539\u53d8\u7535\u611f\u548c\u7535\u6d41\u659c\u7387\uff0c\u4f7f\u540c\u6837\u78c1\u5bc6\u5bf9\u5e94\u66f4\u5927\u7535\u6d41\uff0c\u4f46\u4e0d\u80fd\u66ff\u4ee3\u531d\u6570\u6216\u8109\u5bbd\u9650\u5236\u3002\u8fc7\u5927\u7684\u8f93\u5165\u4f0f\u79d2\u4ecd\u7136\u9700\u8981\u51cf\u5c0f\u5bfc\u901a\u65f6\u95f4\u3001\u589e\u52a0\u531d\u6570\u6216\u589e\u5927\u6709\u6548\u622a\u9762\u79ef\u3002<\/p>\n<h3 id=\"53\">5.3 \u50a8\u80fd\u4e0e\u5355\u5468\u671f\u80fd\u91cf\u5dee<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>E = \u00bdL<sub>m<\/sub>I\u00b2\uff1b\u3000\u0394E = \u00bdL<sub>m<\/sub>(I<sub>pk<\/sub>\u00b2\u2212I<sub>val<\/sub>\u00b2)<\/strong><\/p>\n<p>DCM \u7684\u8c37\u503c\u7ea6\u4e3a\u96f6\uff0c\u6240\u4ee5\u6bcf\u5468\u671f\u53ef\u91ca\u653e\u7684\u7406\u60f3\u52b1\u78c1\u80fd\u91cf\u8fd1\u4f3c\u4e3a \u00bdLmIpk\u00b2\u3002CCM \u8c37\u503c\u975e\u96f6\uff0c\u4e0d\u80fd\u628a\u5168\u90e8\u5cf0\u503c\u50a8\u80fd\u90fd\u89c6\u4f5c\u672c\u5468\u671f\u4f20\u8f93\u91cf\uff1b\u672c\u5468\u671f\u4e3b\u8981\u8f6c\u79fb\u7684\u662f\u5cf0\u8c37\u80fd\u91cf\u4e4b\u5dee\u3002\u8fd9\u4e2a\u533a\u522b\u540c\u65f6\u5f71\u54cd\u7535\u611f\u3001\u78c1\u82af\u9971\u548c\u4e0e\u635f\u8017\u8ba1\u7b97\u3002<\/p>\n<h3 id=\"54\">5.4 \u7535\u6d41\u6709\u6548\u503c\u4e3a\u4ec0\u4e48\u91cd\u8981<\/h3>\n<p>\u94dc\u7ebf\u3001MOSFET \u5bfc\u901a\u7535\u963b\u548c\u91c7\u6837\u7535\u963b\u6309 I\u00b2R \u53d1\u70ed\uff0c\u56e0\u6b64\u4f7f\u7528\u5468\u671f RMS \u7535\u6d41\u3002\u5cf0\u503c\u7528\u4e8e\u7535\u6d41\u9650\u5236\u3001\u5668\u4ef6\u8109\u51b2\u5e94\u529b\u548c\u9971\u548c\u68c0\u67e5\uff0c\u5e73\u5747\u503c\u7528\u4e8e\u8f93\u5165\u8f93\u51fa\u529f\u7387\u4e0e\u7535\u5bb9\u7535\u8377\u5e73\u8861\u3002\u4e09\u4e2a\u503c\u56de\u7b54\u4e0d\u540c\u95ee\u9898\uff0c\u4e92\u76f8\u4e0d\u80fd\u66ff\u4ee3\u3002<\/p>\n<p>\u628a\u6ce2\u5f62\u753b\u6210\u4e09\u89d2\u6216\u68af\u5f62\u4ee5\u540e\uff0c\u5148\u5bf9\u4e00\u4e2a\u5b8c\u6574\u5468\u671f\u79ef\u5206\u3002\u5c24\u5176\u662f\u6b21\u7ea7\u9001\u80fd\u53ea\u5360\u6574\u4e2a\u5468\u671f\u7684\u4e00\u90e8\u5206\uff0c\u4e0d\u5e94\u53ea\u5bf9\u4e8c\u6781\u7ba1\u5bfc\u901a\u671f\u95f4\u6c42 RMS\uff0c\u518d\u628a\u7ed3\u679c\u5f53\u6210\u5b8c\u6574\u5468\u671f\u7684\u989d\u5b9a\u7535\u6d41\u3002<\/p>\n<h2 id=\"dcmccm\">\u516d\u3001DCM\u3001CCM\u3001\u4e34\u754c\u6a21\u5f0f\u4e0e\u51c6\u8c10\u632f<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-04-modes.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"DCM\u3001\u4e34\u754c\u548cCCM\u7684\u521d\u7ea7\u53c2\u8003\u52b1\u78c1\u7535\u6d41\u5bf9\u6bd4\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-04-modes.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"61-dcm\">6.1 DCM\uff1a\u52b1\u78c1\u7535\u6d41\u6709\u96f6\u7535\u6d41\u7a7a\u95f2\u6bb5<\/h3>\n<p>DCM \u6bcf\u6b21\u4ece\u63a5\u8fd1\u96f6\u7684\u52b1\u78c1\u53c2\u8003\u7535\u6d41\u5f00\u59cb\uff0c\u5347\u5230\u5cf0\u503c\u540e\uff0c\u5728\u5173\u65ad\u9001\u80fd\u671f\u95f4\u964d\u5230\u96f6\uff0c\u8fd8\u7559\u6709\u7a7a\u95f2\u65f6\u95f4\u3002\u4f18\u52bf\u662f\u7406\u60f3\u63a7\u5236\u6a21\u578b\u8f83\u7b80\u5355\u3001\u6b21\u7ea7\u6574\u6d41\u5668\u5728\u4e0b\u4e00\u6b21\u5f00\u901a\u524d\u5df2\u505c\u6b62\u4f20\u80fd\u3001\u9002\u5408\u8f83\u4f4e\u529f\u7387\u548c\u8f83\u5c0f\u7535\u611f\u3002\u4ee3\u4ef7\u662f\u4e3a\u4f20\u8f93\u76f8\u540c\u5e73\u5747\u529f\u7387\uff0c\u901a\u5e38\u9700\u8981\u66f4\u9ad8\u5cf0\u503c\u7535\u6d41\u548c\u66f4\u5f3a\u7684\u7535\u5bb9\u7eb9\u6ce2\u7535\u6d41\u80fd\u529b\u3002<\/p>\n<p>DCM \u4e0d\u4fdd\u8bc1 MOSFET \u5b8c\u5168\u96f6\u7535\u6d41\u3001\u96f6\u7535\u538b\u5f00\u901a\u3002\u6f0f\u6781\u7535\u5bb9\u5145\u653e\u7535\u4ecd\u53ef\u80fd\u4ea7\u751f\u5f00\u901a\u635f\u8017\uff0c\u4e8c\u6781\u7ba1\u7ed3\u7535\u5bb9\u4e5f\u4f1a\u4ea7\u751f\u5c16\u5cf0\u3002\u8bf4 DCM \u7406\u60f3\u6a21\u578b\u4e2d\u6ca1\u6709\u5f3a\u8feb\u53cd\u5411\u6062\u590d\uff0c\u4e0e\u8bf4\u5b9e\u9645\u7535\u8def\u5b8c\u5168\u6ca1\u6709\u6362\u6d41\u635f\u8017\uff0c\u662f\u4e24\u56de\u4e8b\u3002<\/p>\n<h3 id=\"62-ccm\">6.2 CCM\uff1a\u78c1\u5316\u72b6\u6001\u5728\u5468\u671f\u4e4b\u95f4\u8fde\u7eed<\/h3>\n<p>CCM \u5230\u4e0b\u4e00\u6b21\u5f00\u901a\u524d\u4ecd\u6709\u975e\u96f6\u7684\u521d\u7ea7\u53c2\u8003\u52b1\u78c1\u7535\u6d41\uff0c\u901a\u5e38\u80fd\u964d\u4f4e\u5cf0\u503c\u4e0e RMS \u5e94\u529b\uff0c\u4f46\u9700\u8981\u66f4\u5927\u52b1\u78c1\u7535\u611f\uff0c\u78c1\u82af\u5b58\u5728\u660e\u663e\u76f4\u6d41\u78c1\u5bc6\u504f\u7f6e\u3002\u6b21\u7ea7\u4e8c\u6781\u7ba1\u5728\u4e3b\u5f00\u5173\u5f00\u901a\u65f6\u53ef\u80fd\u88ab\u5f3a\u8feb\u5173\u65ad\uff0c\u5176\u6062\u590d\u548c\u7ed3\u7535\u5bb9\u4f1a\u589e\u52a0\u5c16\u5cf0\u4e0e\u5f00\u5173\u635f\u8017\u3002<\/p>\n<p>\u201c\u8fde\u7eed\u201d\u6307\u52b1\u78c1\u72b6\u6001\u548c\u603b\u5b89\u531d\u8fde\u7eed\uff0c\u4e0d\u8868\u793a\u5b9e\u9645\u521d\u7ea7\u5bfc\u7ebf\u4e00\u76f4\u6709\u7535\u6d41\u3002\u521d\u7ea7\u4ec5\u5728\u4e3b\u5f00\u5173\u5bfc\u901a\u65f6\u4e3b\u8981\u5bfc\u7535\uff0c\u6b21\u7ea7\u4ec5\u5728\u5173\u65ad\u9001\u80fd\u65f6\u4e3b\u8981\u5bfc\u7535\uff1b\u4e24\u7ec4\u7269\u7406\u7ed5\u7ec4\u7535\u6d41\u4f9d\u7136\u662f\u8109\u51b2\u3002\u8fd9\u4e2a\u7ec6\u8282\u76f4\u63a5\u51b3\u5b9a\u94dc\u635f\u548c\u7535\u5bb9\u7eb9\u6ce2\u7535\u6d41\u3002<\/p>\n<h3 id=\"63\">6.3 \u4e34\u754c\u5bfc\u901a\u4e0e\u51c6\u8c10\u632f<\/h3>\n<p>\u4e34\u754c\u6a21\u5f0f\u8ba9\u6b21\u7ea7\u521a\u9000\u78c1\u5230\u96f6\uff0c\u5c31\u5f00\u59cb\u4e0b\u4e00\u5468\u671f\uff1b\u5de5\u4f5c\u9891\u7387\u968f\u8f93\u5165\u4e0e\u8d1f\u8f7d\u53d8\u5316\u3002\u51c6\u8c10\u632f\u901a\u5e38\u5728\u9000\u78c1\u7ed3\u675f\u4ee5\u540e\u7b49\u5f85\u5408\u9002\u7684\u6f0f\u6781\u7535\u538b\u8c37\u5e95\u518d\u5f00\u901a\uff0c\u4ee5\u51cf\u5c11\u5f00\u901a\u7535\u5bb9\u635f\u8017\u3002\u4e34\u754c\u5bfc\u901a\u3001\u8c37\u5e95\u5f00\u901a\u548c\u771f\u6b63\u96f6\u7535\u538b\u5f00\u901a\u4e0d\u662f\u540c\u4e00\u6982\u5ff5\u3002<\/p>\n<p>\u6709\u4e9b\u63a7\u5236\u5668\u5728\u91cd\u8f7d\u9009\u8f83\u65e9\u8c37\u5e95\u3001\u8f7b\u8f7d\u8df3\u5230\u66f4\u665a\u8c37\u5e95\u6216\u8fdb\u5165\u7a81\u53d1\u6a21\u5f0f\u3002\u8bbe\u8ba1\u5fc5\u987b\u4f7f\u7528\u5176\u9891\u7387\u4e0a\u4e0b\u9650\u548c\u6700\u574f\u65f6\u5e8f\uff0c\u4e0d\u80fd\u7b80\u5355\u628a\u5668\u4ef6\u5ba3\u4f20\u9875\u4e0a\u7684\u201c\u5178\u578b\u9891\u7387\u201d\u4ee3\u5165\u6240\u6709\u5de5\u51b5\u3002\u78c1\u5bc6\u3001\u53d8\u538b\u5668\u635f\u8017\u548c\u53ef\u95fb\u566a\u58f0\u4e5f\u4f1a\u968f\u6a21\u5f0f\u6539\u53d8\u3002<\/p>\n<h3 id=\"64\">6.4 \u4e0d\u5fc5\u5f3a\u8feb\u6240\u6709\u8d1f\u8f7d\u4fdd\u6301\u4e00\u79cd\u6a21\u5f0f<\/h3>\n<p>\u56fa\u5b9a\u9891\u7387\u53cd\u6fc0\u53ef\u80fd\u5728\u4f4e\u8f93\u5165\u91cd\u8f7d\u4e0b CCM\uff0c\u5728\u9ad8\u8f93\u5165\u6216\u8f7b\u8f7d\u4e0b DCM\u3002\u8fd9\u5f88\u6b63\u5e38\uff0c\u524d\u63d0\u662f\u63a7\u5236\u5668\u548c\u8865\u507f\u8986\u76d6\u6240\u6709\u6a21\u5f0f\u3002\u82e5\u8bbe\u8ba1\u660e\u786e\u8981\u6c42\u5168\u8303\u56f4 DCM\uff0c\u5c31\u8981\u9a8c\u8bc1\u7535\u611f\u516c\u5dee\u3001\u9891\u7387\u516c\u5dee\u3001\u8f93\u51fa\u8fc7\u538b\u548c\u8fc7\u8f7d\u60c5\u51b5\u4e0b\u7684 D+D2\uff0c\u800c\u4e0d\u662f\u53ea\u770b\u6807\u79f0\u8f93\u5165\u3002<\/p>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u6a21\u5f0f<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u7535\u6d41\u8c37\u503c<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u5468\u671f\u5c3e\u90e8<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u8ba1\u7b97\u91cd\u70b9<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u4e3b\u8981\u4ee3\u4ef7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">DCM<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u63a5\u8fd1\u96f6<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6709\u7a7a\u95f2\u6bb5<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5cf0\u503c\u80fd\u91cf\u3001\u9000\u78c1\u65f6\u95f4<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u9ad8\u5cf0\u503c\u548c\u7535\u5bb9\u5e94\u529b<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4e34\u754c<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u63a5\u8fd1\u96f6<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u521a\u597d\u9000\u78c1<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u53ef\u53d8\u9891\u7387\u3001\u6700\u5927\u8109\u5bbd<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u9891\u7387\u8de8\u5ea6\u4e0e\u566a\u58f0<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">CCM<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u975e\u96f6<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u65e0\u5b8c\u6574\u9000\u78c1\u7a7a\u95f2<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5cf0\u8c37\u5dee\u3001\u504f\u78c1\u3001\u63a7\u5236\u96f6\u70b9<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u73af\u8def\u4e0e\u5f3a\u8feb\u6362\u6d41<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u51c6\u8c10\u632f<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u901a\u5e38\u9000\u78c1\u540e\u5f00\u901a<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6309\u8c37\u5e95\u7b49\u5f85<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8c37\u5e95\u4f4d\u7f6e\u4e0e\u9891\u7387\u9650\u5236<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f7b\u91cd\u8f7d\u6a21\u5f0f\u5207\u6362<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 id=\"dcm\">\u4e03\u3001DCM \u5b8c\u6574\u8ba1\u7b97\u94fe\uff1a\u5148\u80fd\u91cf\uff0c\u518d\u7535\u6d41\uff0c\u518d\u65f6\u5e8f<\/h2>\n<h3 id=\"71\">7.1 \u7ed9\u6bcf\u5468\u671f\u5efa\u7acb\u529f\u7387\u76ee\u6807<\/h3>\n<p>\u5bf9\u65e0\u635f\u78c1\u4ef6\u3001\u56fa\u5b9a\u6574\u6d41\u538b\u964d\u7684\u521d\u7b97\u6a21\u578b\uff0c\u5b9a\u4e49 Pcell=Vo\u2032Io\u3002\u82e5\u5c06\u5176\u4ed6\u635f\u8017\u7eb3\u5165\u50a8\u80fd\u9884\u7b97\uff0c\u5fc5\u987b\u660e\u786e\u65b0\u589e\u529f\u7387\u9879\u3002\u4ee5 5 V\/2 A\u3001\u6574\u6d41\u538b\u964d 0.5 V \u4e3a\u4f8b\uff0cPcell=5.5\u00d72=11 W\uff0c\u8f93\u51fa\u8d1f\u8f7d\u529f\u7387\u4e3a 10 W\uff0c\u5176\u4e2d 1 W \u5bf9\u5e94\u5047\u8bbe\u7684\u4e8c\u6781\u7ba1\u5e73\u5747\u635f\u8017\u3002<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>E<sub>cycle<\/sub> = P<sub>cell<\/sub>\/f<sub>s<\/sub>\uff1b\u3000I<sub>pk<\/sub> = \u221a[2P<sub>cell<\/sub>\/(L<sub>m<\/sub>f<sub>s<\/sub>)]<\/strong><\/p>\n<p>\u5728\u56fa\u5b9a\u7535\u611f\u3001\u9891\u7387\u4e0e\u8f93\u51fa\u529f\u7387\u6761\u4ef6\u4e0b\uff0cDCM \u6240\u9700\u7406\u60f3\u5cf0\u503c\u4e0d\u7531\u8f93\u5165\u7535\u538b\u76f4\u63a5\u51b3\u5b9a\u3002\u8f93\u5165\u6539\u53d8\u65f6\uff0c\u8fbe\u5230\u8fd9\u4e2a\u5cf0\u503c\u6240\u9700\u5bfc\u901a\u65f6\u95f4\u6539\u53d8\u3002\u8fd9\u89e3\u91ca\u4e86\u9ad8\u8f93\u5165\u65f6\u8109\u5bbd\u53d8\u7a84\uff0c\u5374\u4e0d\u4e00\u5b9a\u4f7f\u6ee1\u8f7d\u5cf0\u503c\u660e\u663e\u53d8\u5c0f\u3002<\/p>\n<h3 id=\"72\">7.2 \u5bfc\u901a\u3001\u9000\u78c1\u4e0e\u7a7a\u95f2\u65f6\u95f4<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>t<sub>on<\/sub> = L<sub>m<\/sub>I<sub>pk<\/sub>\/V<sub>in<\/sub>\uff1b\u3000t<sub>demag<\/sub> = L<sub>m<\/sub>I<sub>pk<\/sub>\/V<sub>R<\/sub><\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>D+D<sub>2<\/sub> = L<sub>m<\/sub>I<sub>pk<\/sub>f<sub>s<\/sub>(1\/V<sub>in<\/sub>+1\/V<sub>R<\/sub>) &lt; 1<\/strong><\/p>\n<p>\u6700\u4f4e\u8f93\u5165\u4e00\u822c\u9700\u8981\u6700\u957f\u5bfc\u901a\u65f6\u95f4\uff1b\u8f93\u51fa\u7535\u538b\u4e0b\u964d\u4f7f VR \u53d8\u5c0f\uff0c\u4f1a\u5ef6\u957f\u9000\u78c1\u3002\u542f\u52a8\u65f6\u8f93\u51fa\u63a5\u8fd1\u96f6\u3001\u77ed\u8def\u65f6\u8f93\u51fa\u88ab\u62c9\u4f4e\uff0c\u56e0\u6b64\u6b63\u5e38\u6ee1\u8f7d\u7684\u9000\u78c1\u4f59\u91cf\u4e0d\u80fd\u76f4\u63a5\u4ee3\u8868\u5f02\u5e38\u5de5\u51b5\u4f59\u91cf\u3002\u77ed\u8def\u5fc5\u987b\u914d\u5408\u63a7\u5236\u5668\u9650\u6d41\u3001\u964d\u9891\u6216\u6253\u55dd\u5904\u7406\u3002<\/p>\n<h3 id=\"73-rms\">7.3 \u521d\u6b21\u7ea7\u5cf0\u503c\u3001\u5e73\u5747\u503c\u4e0e RMS<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>s,pk<\/sub> = nI<sub>pk<\/sub>\uff1b\u3000I<sub>p,rms<\/sub> = I<sub>pk<\/sub>\u221a(D\/3)\uff1b\u3000I<sub>s,rms<\/sub> = nI<sub>pk<\/sub>\u221a(D<sub>2<\/sub>\/3)<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>in,avg<\/sub> = \u00bdI<sub>pk<\/sub>D\uff1b\u3000I<sub>o<\/sub> = \u00bdnI<sub>pk<\/sub>D<sub>2<\/sub><\/strong><\/p>\n<p>\u6700\u540e\u4e00\u5f0f\u662f\u68c0\u67e5\u6574\u5957\u8bbe\u8ba1\u6709\u6ca1\u6709\u81ea\u6d3d\u7684\u597d\u5de5\u5177\u3002\u7528\u4f60\u7684\u5cf0\u503c\u548c\u9000\u78c1\u5360\u6bd4\u7b97\u51fa\u6765\u7684\u5e73\u5747\u6b21\u7ea7\u7535\u6d41\uff0c\u5982\u679c\u548c\u76ee\u6807\u8f93\u51fa\u5dee\u5f88\u591a\uff0c\u5c31\u5e94\u68c0\u67e5 n \u7684\u65b9\u5411\u3001\u9891\u7387\u5355\u4f4d\u3001\u6548\u7387\u662f\u5426\u91cd\u590d\u8ba1\u5165\u6216\u5cf0\u503c\u662f\u5426\u53ea\u7b97\u4e86\u4e00\u534a\u3002<\/p>\n<h3 id=\"74\">7.4 \u4ece\u6700\u5927\u5360\u7a7a\u6bd4\u53cd\u6c42\u7535\u611f<\/h3>\n<p>\u5982\u679c\u5e0c\u671b\u6700\u4f4e\u8f93\u5165\u4e0b\u6ee1\u8f7d D \u4e0d\u8d85\u8fc7\u4e00\u4e2a\u76ee\u6807\u503c\uff0c\u7406\u60f3 DCM \u53ef\u4ece\u8f93\u5165\u529f\u7387\u7ea7\u9884\u7b97\u63a8\u5f97\uff1a<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>L<sub>m<\/sub> = V<sub>in,min<\/sub>\u00b2D\u00b2\/(2P<sub>cell<\/sub>f<sub>s<\/sub>)<\/strong><\/p>\n<p>\u8fd9\u4e2a\u5f0f\u5b50\u53ea\u6ee1\u8db3\u5bfc\u901a\u6761\u4ef6\uff0c\u4e0d\u80fd\u81ea\u52a8\u4fdd\u8bc1\u9000\u78c1\u8db3\u591f\u5feb\u3002\u8fd8\u5fc5\u987b\u9009\u62e9 n \u548c VR\uff0c\u68c0\u67e5 D2 \u4e0e\u7a7a\u95f2\u4f59\u91cf\u3002\u4e24\u4e2a\u6761\u4ef6\u8981\u4e00\u8d77\u6ee1\u8db3\uff0c\u5426\u5219\u53ef\u80fd\u8ba1\u7b97\u51fa\u4e00\u4e2a\u5bfc\u901a\u5360\u7a7a\u6bd4\u6f02\u4eae\u3001\u5173\u65ad\u5374\u6765\u4e0d\u53ca\u91ca\u653e\u80fd\u91cf\u7684\u65b9\u6848\u3002<\/p>\n<h3 id=\"75-dcm\">7.5 DCM \u7684\u4e34\u754c\u529f\u7387<\/h3>\n<p>\u4ee4 D+D2=1\uff0c\u53ef\u5f97\u5230\u7ed9\u5b9a Vin\u3001VR\u3001Lm\u3001fs \u4e0b\u7684\u7406\u60f3\u4e34\u754c\u529f\u7387\uff1a<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>crit<\/sub> = [V<sub>in<\/sub>V<sub>R<\/sub>\/(V<sub>in<\/sub>+V<sub>R<\/sub>)]\u00b2\/(2L<sub>m<\/sub>f<sub>s<\/sub>)<\/strong><\/p>\n<p>\u5b9e\u9645\u8bbe\u8ba1\u628a\u516c\u5dee\u548c\u635f\u8017\u8ba1\u5165\u540e\u518d\u7559\u4f59\u91cf\u3002\u8fd9\u4e2a\u516c\u5f0f\u4e5f\u8bf4\u660e\u63d0\u9ad8\u7535\u611f\u4f1a\u964d\u4f4e\u56fa\u5b9a\u9891\u7387\u4e0b\u7684 DCM \u4e34\u754c\u529f\u7387\uff0c\u53ef\u80fd\u4f7f\u540c\u4e00\u78c1\u4ef6\u66f4\u65e9\u8fdb\u5165 CCM\u3002\u6539\u53d8\u7535\u611f\u4e0d\u4ec5\u6539\u53d8\u7535\u6d41\u659c\u7387\uff0c\u4e5f\u6539\u53d8\u5de5\u4f5c\u6a21\u5f0f\u8fb9\u754c\u3002<\/p>\n<h2 id=\"ccm\">\u516b\u3001CCM \u8ba1\u7b97\u94fe\uff1a\u5360\u7a7a\u6bd4\u3001\u5cf0\u8c37\u503c\u548c\u80fd\u91cf\u5dee<\/h2>\n<h3 id=\"81\">8.1 \u7528\u4f0f\u79d2\u5e73\u8861\u6c42\u5360\u7a7a\u6bd4<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>in<\/sub>D = V<sub>R<\/sub>(1\u2212D)\uff1b\u3000D = V<sub>R<\/sub>\/(V<sub>in<\/sub>+V<sub>R<\/sub>)<\/strong><\/p>\n<p>\u53ea\u6709\u5728\u4e00\u4e2a\u5468\u671f\u91cc\u521d\u7ea7\u5bfc\u901a\u52a0\u6b21\u7ea7\u6301\u7eed\u9001\u80fd\u8986\u76d6\u5168\u90e8\u6709\u6548\u65f6\u6bb5\u65f6\uff0c\u624d\u80fd\u76f4\u63a5\u4f7f\u7528\u8fd9\u6761 CCM \u5360\u7a7a\u6bd4\u5173\u7cfb\u3002DCM \u591a\u4e86\u4e00\u6bb5\u7a7a\u95f2\u65f6\u95f4\uff0c\u4e0d\u80fd\u76f4\u63a5\u4ee4 D2=1\u2212D\uff1bDCM \u7684\u8f93\u51fa\u8fd8\u4e0e\u8d1f\u8f7d\u3001\u7535\u611f\u548c\u9891\u7387\u6709\u5173\u3002<\/p>\n<h3 id=\"82\">8.2 \u5cf0\u8c37\u7535\u6d41\u600e\u4e48\u6c42<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394I<sub>p<\/sub> = V<sub>in<\/sub>D\/(L<sub>m<\/sub>f<sub>s<\/sub>)\uff1b\u3000I\u0304<sub>p,on<\/sub> = I<sub>o<\/sub>\/[n(1\u2212D)]<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>pk<\/sub> = I\u0304<sub>p,on<\/sub>+\u0394I<sub>p<\/sub>\/2\uff1b\u3000I<sub>val<\/sub> = I\u0304<sub>p,on<\/sub>\u2212\u0394I<sub>p<\/sub>\/2<\/strong><\/p>\n<p>\u82e5\u7b97\u51fa Ival\u22640\uff0c\u8bf4\u660e\u8be5\u5de5\u4f5c\u70b9\u5df2\u7ecf\u4e0d\u5c5e\u4e8e\u5047\u8bbe\u7684 CCM\uff0c\u5e94\u8be5\u5207\u6362\u5230 DCM \u6216\u4e34\u754c\u6a21\u578b\u3002\u4e0d\u80fd\u7ee7\u7eed\u628a\u8d1f\u8c37\u503c\u5f53\u6210\u771f\u5b9e\u7684\u4e8c\u6781\u7ba1\u53cd\u6fc0\u52b1\u78c1\u7535\u6d41\uff0c\u666e\u901a\u4e8c\u6781\u7ba1\u62d3\u6251\u4e0d\u4f1a\u4efb\u610f\u5141\u8bb8\u8fd9\u4e2a\u8d1f\u5411\u4f20\u80fd\u72b6\u6001\u3002<\/p>\n<h3 id=\"83-rms\">8.3 \u68af\u5f62\u8109\u51b2\u7684 RMS<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>p,rms<\/sub>\u00b2 = D(I<sub>val<\/sub>\u00b2+I<sub>val<\/sub>I<sub>pk<\/sub>+I<sub>pk<\/sub>\u00b2)\/3<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>s,rms<\/sub>\u00b2 = n\u00b2(1\u2212D)(I<sub>val<\/sub>\u00b2+I<sub>val<\/sub>I<sub>pk<\/sub>+I<sub>pk<\/sub>\u00b2)\/3<\/strong><\/p>\n<p>\u8fd9\u4e24\u6761\u4ecd\u7136\u662f\u5b8c\u6574\u5468\u671f\u6709\u6548\u503c\uff0c\u4e0d\u662f\u5bfc\u901a\u65f6\u95f4\u5185\u90e8\u7684\u503c\u3002\u7528\u5e73\u5747\u7535\u6d41\u5e73\u65b9\u52a0\u659c\u5761\u53d8\u5316\u91cf\u5e73\u65b9\u5341\u4e8c\u5206\u4e4b\u4e00\uff0c\u4e5f\u80fd\u5f97\u5230\u540c\u6837\u7ed3\u679c\uff0c\u53ef\u7528\u4e8e\u72ec\u7acb\u4ea4\u53c9\u68c0\u67e5\u3002<\/p>\n<h3 id=\"84-ccm\">8.4 CCM \u7684\u50a8\u80fd\u5cf0\u503c\u4e0e\u4f20\u80fd\u91cf\u4e0d\u540c<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>cell<\/sub> \u2248 \u00bdL<sub>m<\/sub>(I<sub>pk<\/sub>\u00b2\u2212I<sub>val<\/sub>\u00b2)f<sub>s<\/sub><\/strong><\/p>\n<p>\u78c1\u82af\u5fc5\u987b\u627f\u53d7\u5cf0\u503c\u603b\u80fd\u91cf\u548c\u5cf0\u503c\u78c1\u5bc6\uff0c\u5373\u4f7f\u6bcf\u5468\u671f\u53ea\u8f93\u51fa\u5176\u4e2d\u7684\u589e\u91cf\u3002\u82e5\u53ea\u6309 \u0394I \u7b97 B\uff0c\u518d\u8ba4\u4e3a\u201c\u5c0f\u7eb9\u6ce2\u6240\u4ee5\u4e0d\u4f1a\u9971\u548c\u201d\uff0c\u5c31\u6f0f\u6389\u76f4\u6d41\u504f\u7f6e\u3002CCM \u7684\u78c1\u82af\u635f\u8017\u4e0e\u78c1\u5bc6\u6446\u5e45\u6709\u5173\uff0c\u4f46\u9971\u548c\u68c0\u67e5\u5fc5\u987b\u770b\u6700\u5927\u7edd\u5bf9\u78c1\u5bc6\u5e76\u8003\u8651\u5269\u78c1\u4e0e\u975e\u7ebf\u6027\u3002<\/p>\n<h3 id=\"85\">8.5 \u6a21\u578b\u9002\u7528\u8303\u56f4<\/h3>\n<p>\u8fd9\u91cc\u5ffd\u7565\u5f00\u5173\u4e0e\u7ed5\u7ec4\u538b\u964d\u3001\u6f0f\u611f\u6362\u6d41\u3001\u6b7b\u533a\u548c\u63a7\u5236\u5ef6\u65f6\u3002\u9ad8\u7535\u6d41\u4f4e\u7535\u538b\u7535\u6e90\u4e2d\uff0c\u6b21\u7ea7\u538b\u964d\u5360\u6bd4\u660e\u663e\uff0c\u5e94\u5728 Vo\u2032 \u4e2d\u5408\u7406\u4fee\u6b63\u5e76\u91cd\u65b0\u8fed\u4ee3\u3002\u8f83\u9ad8\u9891\u7387\u65f6\uff0c\u5173\u65ad\u6362\u6d41\u5360\u53bb\u7684\u65f6\u95f4\u4e5f\u53ef\u80fd\u4e0d\u80fd\u5ffd\u7565\u3002\u624b\u7b97\u8d1f\u8d23\u5efa\u7acb\u53c2\u6570\u5173\u7cfb\uff0c\u4eff\u771f\u548c\u6d4b\u8bd5\u8d1f\u8d23\u628a\u8fd9\u4e9b\u4e8c\u9636\u9879\u8865\u56de\u6765\u3002<\/p>\n<h2 id=\"_6\">\u4e5d\u3001\u5148\u9009\u53cd\u5c04\u7535\u538b\uff0c\u518d\u770b\u7535\u538b\u5e94\u529b\u4e0e\u9000\u78c1<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-05-tradeoffs.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u531d\u6bd4\u4e0e\u53cd\u5c04\u7535\u538b\u5982\u4f55\u540c\u65f6\u5f71\u54cd\u5360\u7a7a\u6bd4\u548c\u5668\u4ef6\u8010\u538b\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-05-tradeoffs.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"91\">9.1 \u53cd\u5c04\u7535\u538b\u4e0d\u662f\u8d8a\u9ad8\u8d8a\u597d<\/h3>\n<p>\u63d0\u9ad8 n \u4f1a\u63d0\u9ad8 VR\u3002DCM \u4e2d\u9000\u78c1\u66f4\u5feb\uff0c\u53ef\u80fd\u589e\u52a0\u7a7a\u95f2\u4f59\u91cf\uff1bCCM \u4e2d\u540c\u4e00\u8f93\u5165\u4e0b\u5360\u7a7a\u6bd4\u63d0\u9ad8\u3002\u4e0e\u6b64\u540c\u65f6 MOSFET \u7406\u60f3\u5173\u65ad\u5e73\u53f0\u53d8\u9ad8\uff0c\u6b21\u7ea7\u5cf0\u503c\u7535\u6d41\u4e5f\u6309 n \u589e\u52a0\u3002\u8f83\u9ad8 VR \u8fd8\u4f1a\u538b\u7f29\u94b3\u4f4d\u4e0e\u8010\u538b\u4f59\u91cf\u3002<\/p>\n<p>\u964d\u4f4e n \u4f1a\u964d\u4f4e MOSFET \u5e73\u53f0\uff0c\u4f46\u6b21\u7ea7\u4e8c\u6781\u7ba1\u5728\u521d\u7ea7\u5bfc\u901a\u65f6\u8981\u627f\u53d7\u66f4\u9ad8\u7684\u8f93\u5165\u6298\u7b97\u53cd\u538b\uff0cDCM \u9000\u78c1\u4e5f\u4f1a\u5ef6\u957f\u3002\u56e0\u6b64\u531d\u6bd4\u5b9e\u9645\u4e0a\u662f\u5728\u4e3b\u5f00\u5173\u8010\u538b\u3001\u6b21\u7ea7\u8010\u538b\u3001\u5cf0\u503c\u7535\u6d41\u3001\u63a7\u5236\u8109\u5bbd\u548c\u78c1\u4ef6\u53ef\u5236\u9020\u6027\u4e4b\u95f4\u627e\u5e73\u8861\u3002<\/p>\n<h3 id=\"92-mosfet\">9.2 MOSFET \u7406\u60f3\u5e73\u53f0\u4e0e\u5b9e\u9645\u6700\u9ad8\u503c<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>DS,plateau<\/sub> \u2248 V<sub>in,max<\/sub>+V<sub>R<\/sub><\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>DS,max<\/sub> \u2248 V<sub>in,max<\/sub>+V<sub>R<\/sub>+V<sub>leak,extra<\/sub><\/strong><\/p>\n<p>\u5c16\u5cf0\u8fd8\u5305\u62ec\u94b3\u4f4d\u5668\u4ef6\u52a8\u6001\u3001\u8d70\u7ebf\u7535\u611f\u548c\u6d4b\u91cf\u8bef\u5dee\u3002\u4e0d\u80fd\u53ea\u7528\u201c\u8f93\u5165\u52a0\u53cd\u5c04\u201d\u9009\u62e9 MOSFET\uff0c\u4e5f\u4e0d\u80fd\u628a\u96ea\u5d29\u80fd\u529b\u5f53\u4f5c\u957f\u671f\u6b63\u5e38\u94b3\u4f4d\u65b9\u6848\u3002\u9009\u578b\u540e\u8981\u6838\u5bf9\u6e29\u5ea6\u3001\u77ac\u6001\u3001\u5b9e\u9645\u5c16\u5cf0\u548c\u5668\u4ef6\u7edd\u5bf9\u6700\u5927\u503c\u4e4b\u95f4\u7684\u5de5\u7a0b\u4f59\u91cf\u3002<\/p>\n<h3 id=\"93\">9.3 \u6b21\u7ea7\u4e8c\u6781\u7ba1\u53cd\u5411\u8010\u538b<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>D,rev,ideal<\/sub> \u2248 V<sub>o<\/sub>+V<sub>in,max<\/sub>\/n<\/strong><\/p>\n<p>\u53cd\u538b\u6700\u9ad8\u901a\u5e38\u5728\u4e3b\u5f00\u5173\u5bfc\u901a\u671f\u95f4\u51fa\u73b0\u3002\u6b21\u7ea7\u6f0f\u611f\u3001\u4e8c\u6781\u7ba1\u7ed3\u7535\u5bb9\u548c\u6362\u6d41\u4f1a\u5728\u5b83\u4e0a\u9762\u53e0\u52a0\u632f\u94c3\u3002\u4f8b\u5982 n=100\/7\u3001\u6700\u9ad8\u76f4\u6d41\u6bcd\u7ebf\u7ea6 342 V\u3001Vo=5 V\uff0c\u7406\u60f3\u53cd\u538b\u7ea6\u4e3a 29 V\uff0c\u4f46\u6700\u7ec8\u989d\u5b9a\u503c\u8fd8\u8981\u8986\u76d6\u5b9e\u9645\u5c16\u5cf0\u3001\u6e29\u5ea6\u548c\u8f93\u51fa\u5f02\u5e38\u3002<\/p>\n<h3 id=\"94\">9.4 \u531d\u6570\u53d6\u6574\u4ee5\u540e\u8981\u91cd\u65b0\u8ba1\u7b97<\/h3>\n<p>\u7406\u60f3\u531d\u6bd4\u53ef\u80fd\u662f 1.87\uff0c\u9009\u6210 10:5 \u540e\u5c31\u662f 2\uff1b\u4e0d\u8981\u4ecd\u7528 1.87 \u8ba1\u7b97\u5e73\u53f0\u548c\u9000\u78c1\u3002\u8f85\u52a9\u7ed5\u7ec4\u540c\u6837\u662f\u6574\u6570\u531d\uff0c\u5c11\u4e00\u531d\u6216\u591a\u4e00\u531d\u90fd\u4f1a\u660e\u663e\u6539\u53d8\u4f4e\u538b\u4f9b\u7535\u3002\u5e94\u628a\u6700\u7ec8\u6574\u6570\u531d\u6570\u5199\u8fdb\u7edf\u4e00\u53c2\u6570\u8868\uff0c\u6240\u6709\u5e94\u529b\u4e0e\u65f6\u5e8f\u7531\u8fd9\u5f20\u8868\u66f4\u65b0\u3002<\/p>\n<h2 id=\"220-v-ac-5-v2-a-dcm\">\u5341\u3001\u4e3b\u7b97\u4f8b\uff1a220 V AC \u8f93\u5165\uff0c5 V\/2 A \u7684\u9694\u79bb DCM \u53cd\u6fc0<\/h2>\n<h3 id=\"101\">10.1 \u8bbe\u8ba1\u8f93\u5165\u548c\u5047\u8bbe<\/h3>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u9879\u76ee<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u76ee\u6807\u6216\u521d\u7b97\u503c<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4ea4\u6d41\u8f93\u5165<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">220 V AC\uff0c50 Hz<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u672c\u7b97\u4f8b\u8003\u5bdf \u00b110%\uff1a198\uff5e242 V AC<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8bbe\u8ba1\u76f4\u6d41\u6bcd\u7ebf<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6700\u4f4e 230 V\uff0c\u6700\u9ad8\u7ea6 342 V<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6700\u4f4e\u503c\u5305\u542b\u50a8\u80fd\u653e\u7535\u88d5\u91cf\uff0c\u987b\u9a8c\u8bc1<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">5 V\u30012 A\u300110 W<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa\u7535\u6d41\u672a\u7279\u522b\u6307\u5b9a\u65f6\u7684\u6559\u5b66\u4f8b\u503c<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u56fa\u5b9a\u5f00\u5173\u9891\u7387<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">100 kHz<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u540e\u7eed\u68c0\u67e5\u9891\u7387\u516c\u5dee<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6574\u6d41\u538b\u964d\u5047\u8bbe<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">0.5 V<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6700\u7ec8\u7528\u5b9e\u9645\u5668\u4ef6\u66f2\u7ebf<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u529f\u7387\u7ea7\u9001\u80fd\u9884\u7b97<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">11 W<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">5.5 V\u00d72 A<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u603b\u6548\u7387\u76ee\u6807<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">85%<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4ec5\u7528\u4f5c\u8f93\u5165\u548c\u635f\u8017\u9884\u7b97<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u52b1\u78c1\u7535\u611f\u521d\u9009<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">1.00 mH<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u521d\u7ea7\u53c2\u8003\u503c\uff0c\u53e6\u67e5\u516c\u5dee<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6700\u7ec8\u531d\u6570<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Np=100\u3001Ns=7\u3001Na=20<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">n=100\/7\u224814.286<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u78c1\u82af\u5047\u8bbe<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Ae=30 mm\u00b2\u3001Amin=27 mm\u00b2<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u987b\u7531\u6700\u7ec8\u78c1\u82af\u8d44\u6599\u786e\u8ba4<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7ed3\u6784\u5019\u9009<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">P1 50T\u2014S 7T\u2014P2 50T\u2014A 20T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u521d\u7ea7\u4e24\u6bb5\u4e32\u8054\u52a9\u78c1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u6548\u7387\u76ee\u6807\u5bf9\u5e94\u603b\u8f93\u5165\u529f\u7387\u9884\u7b97\u4e3a 10\/0.85\u224811.765 W\u3002\u603b\u635f\u8017\u9884\u7b97\u7ea6 1.765 W\uff0c\u5176\u4e2d\u5047\u8bbe\u6574\u6d41\u5668\u5df2\u7ecf\u6d88\u8017 1 W\uff0c\u5269\u4f59\u7ea6 0.765 W \u7559\u7ed9\u4e3b\u5f00\u5173\u3001\u78c1\u4ef6\u3001\u94b3\u4f4d\u548c\u63a7\u5236\u3002\u8fd9\u4e2a\u9884\u7b97\u76f8\u5f53\u7d27\uff0c\u540e\u9762\u4f1a\u901a\u8fc7\u94b3\u4f4d\u7b97\u4f8b\u8bf4\u660e\u4e3a\u4ec0\u4e48\u5fc5\u987b\u91cd\u65b0\u8fed\u4ee3\uff0c\u4e0d\u80fd\u4ec5\u628a\u201c85%\u201d\u5199\u8fdb\u89c4\u683c\u5c31\u8ba4\u4e3a\u4e00\u5b9a\u8fbe\u5230\u3002<\/p>\n<p>\u4ea4\u6d41\u8f93\u5165\u7535\u6d41\u4e0d\u80fd\u76f4\u63a5\u7528 11.765\/220 \u5f53\u4f5c RMS\uff0c\u56e0\u4e3a\u6865\u5f0f\u6574\u6d41\u52a0\u5927\u7535\u5bb9\u7684\u8f93\u5165\u7535\u6d41\u96c6\u4e2d\u5728\u6ce2\u5cf0\u9644\u8fd1\uff0c\u529f\u7387\u56e0\u6570\u53ef\u80fd\u660e\u663e\u4f4e\u4e8e\u4e00\u300211.765\/220\u224853.5 mA \u53ea\u662f\u6709\u529f\u5206\u91cf\u7684\u91cf\u7ea7\u3002\u6865\u5806\u3001\u4fdd\u9669\u4e1d\u3001NTC \u548c\u6ee4\u6ce2\u5668\u8fd8\u9700\u6309\u8109\u51b2\u5145\u7535\u548c\u6d6a\u6d8c\u8ba1\u7b97\u3002<\/p>\n<h3 id=\"102-220-v-ac\">10.2 220 V AC \u5148\u6574\u6d41\u6210\u4ec0\u4e48\u7535\u538b<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>pk<\/sub> \u2248 \u221a2V<sub>AC,rms<\/sub>\u22122V<sub>F,bridge<\/sub><\/strong><\/p>\n<p>220 V \u7684\u7406\u60f3\u5cf0\u503c\u7ea6 311.1 V\uff1b198 V \u7ea6 280.0 V\uff1b242 V \u7ea6 342.2 V\u3002\u6865\u5806\u540c\u65f6\u5bfc\u901a\u4e24\u53ea\u4e8c\u6781\u7ba1\uff0c\u56e0\u6b64\u5b9e\u9645\u5145\u7535\u5cf0\u503c\u7565\u4f4e\u3002\u6700\u4f4e\u76f4\u6d41\u6bcd\u7ebf\u4e0d\u7b49\u4e8e\u4ea4\u6d41\u6709\u6548\u503c\uff0c\u4e5f\u4e0d\u7b49\u4e8e\u6700\u4f4e\u4ea4\u6d41\u6ce2\u5cf0\uff0c\u5b83\u662f\u50a8\u80fd\u7535\u5bb9\u5728\u4e24\u6b21\u5145\u7535\u4e4b\u95f4\u653e\u7535\u540e\u7684\u8c37\u503c\u3002<\/p>\n<p>\u672c\u6587\u9009\u7528 230 V \u4f5c\u4e3a\u53cd\u6fc0\u8bbe\u8ba1\u6700\u4f4e\u6bcd\u7ebf\uff0c\u4e3b\u8981\u4e3a\u4e86\u7ed9\u6bcd\u7ebf\u7eb9\u6ce2\u3001\u516c\u5dee\u548c\u77ed\u65f6\u8dcc\u843d\u7559\u7a7a\u95f4\u3002\u5b83\u4e0d\u662f\u58f0\u79f0 198 V \u4ea4\u6d41\u6574\u6d41\u540e\u5fc5\u7136\u53ea\u6709 230 V\uff0c\u5177\u4f53\u5173\u7cfb\u5c06\u5728\u8f93\u5165\u7535\u5bb9\u7ae0\u8282\u8ba1\u7b97\u3002\u82e5\u8981\u6c42 85\uff5e265 V \u5bbd\u8303\u56f4\u8f93\u5165\uff0c\u5fc5\u987b\u53e6\u884c\u91cd\u7b97\uff0c\u4e0d\u80fd\u6cbf\u7528\u672c\u7a84\u8303\u56f4\u4f8b\u503c\u3002<\/p>\n<h3 id=\"103\">10.3 \u4ece\u6bcf\u5468\u671f\u80fd\u91cf\u6c42\u5cf0\u503c<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>E<sub>cycle<\/sub> = 11\/100000 = 110 \u03bcJ<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>pk<\/sub> = \u221a[2\u00d711\/(1.00\u00d710\u207b\u00b3\u00d7100000)] = 0.4690 A<\/strong><\/p>\n<p>\u8fd9\u662f\u76ee\u6807\u6ee1\u8f7d\u6240\u9700\u7684\u7406\u60f3\u52b1\u78c1\u5cf0\u503c\uff0c\u4e0d\u7b49\u4e8e\u8fc7\u6d41\u9608\u503c\u3002\u771f\u5b9e\u6837\u673a\u53ef\u80fd\u56e0\u4e3a\u6f0f\u611f\u3001\u94dc\u635f\u7b49\u9700\u8981\u66f4\u591a\u5cf0\u503c\u6216\u8f83\u957f\u8109\u5bbd\uff0c\u56e0\u6b64\u78c1\u82af\u4e0e\u5f00\u5173\u8981\u7559\u989d\u5916\u4f59\u91cf\u3002\u4e0d\u80fd\u7528 0.4690 A \u540c\u65f6\u5f53\u6b63\u5e38\u6ee1\u8f7d\u503c\u548c\u6700\u5927\u5141\u8bb8\u6781\u9650\u3002<\/p>\n<h3 id=\"104\">10.4 \u5728\u6700\u4f4e\u6bcd\u7ebf\u68c0\u67e5\u65f6\u5e8f<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>t<sub>on,230V<\/sub> = 1.00 mH\u00d70.4690 A\/230 V = 2.039 \u03bcs\uff1b\u3000D\u22480.2039<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>R<\/sub> = (100\/7)\u00d7(5+0.5)\u224878.57 V\uff1b\u3000t<sub>demag<\/sub> = 1.00 mH\u00d70.4690 A\/78.57 V\u22485.970 \u03bcs<\/strong><\/p>\n<p>\u5468\u671f\u4e3a 10 \u03bcs\uff0cD2\u22480.5970\uff0c\u7a7a\u95f2\u7ea6 1.991 \u03bcs\uff0c\u6240\u4ee5\u6b63\u5e38\u8bbe\u8ba1\u70b9\u786e\u5b9e\u5c5e\u4e8e DCM\u3002\u6700\u4f4e\u6bcd\u7ebf\u4e0b D+D2\u22480.8009\uff0c\u5c1a\u6709\u65f6\u95f4\u4f59\u91cf\u3002\u4f46\u82e5\u63d0\u9ad8\u5cf0\u503c\u3001\u7535\u611f\u6216\u9891\u7387\uff0c\u5e94\u91cd\u65b0\u68c0\u67e5\u8be5\u548c\u5f0f\uff0c\u4e0d\u53ef\u628a\u8fd9 1.991 \u03bcs \u5f53\u4f5c\u6240\u6709\u5f02\u5e38\u6761\u4ef6\u4e0b\u90fd\u5b58\u5728\u3002<\/p>\n<h3 id=\"105\">10.5 \u5728\u6807\u79f0\u548c\u6700\u9ad8\u6bcd\u7ebf\u68c0\u67e5<\/h3>\n<p>\u53d6 310 V \u4f5c\u4e3a\u6807\u79f0\u6ce2\u5cf0\u9644\u8fd1\u6bcd\u7ebf\uff0c\u5bfc\u901a\u7ea6 1.513 \u03bcs\uff1b342 V \u65f6\u7ea6 1.371 \u03bcs\u3002\u7406\u60f3\u6ee1\u8f7d\u5cf0\u503c\u4fdd\u6301\u7ea6 0.469 A\uff0c\u9000\u78c1\u7ea6 5.970 \u03bcs\uff0c\u6240\u4ee5\u9ad8\u6bcd\u7ebf\u7a7a\u95f2\u66f4\u591a\u3002\u771f\u5b9e\u6bcd\u7ebf\u8fd8\u968f 100 Hz \u7eb9\u6ce2\u53d8\u5316\uff0c\u63a7\u5236\u5668\u5fc5\u987b\u5728\u6574\u4e2a\u7eb9\u6ce2\u5468\u671f\u5185\u7ef4\u6301\u8f93\u51fa\u3002<\/p>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"text-align: right;\">Vin<\/th>\n<th style=\"text-align: right;\">ton<\/th>\n<th style=\"text-align: right;\">D<\/th>\n<th style=\"text-align: right;\">tdemag<\/th>\n<th style=\"text-align: right;\">\u7a7a\u95f2\u65f6\u95f4<\/th>\n<th style=\"text-align: right;\">\u521d\u7ea7 RMS<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: right;\">230 V<\/td>\n<td style=\"text-align: right;\">2.039 \u03bcs<\/td>\n<td style=\"text-align: right;\">0.2039<\/td>\n<td style=\"text-align: right;\">5.970 \u03bcs<\/td>\n<td style=\"text-align: right;\">1.991 \u03bcs<\/td>\n<td style=\"text-align: right;\">\u7ea6 0.1223 A<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">310 V<\/td>\n<td style=\"text-align: right;\">1.513 \u03bcs<\/td>\n<td style=\"text-align: right;\">0.1513<\/td>\n<td style=\"text-align: right;\">5.970 \u03bcs<\/td>\n<td style=\"text-align: right;\">2.517 \u03bcs<\/td>\n<td style=\"text-align: right;\">\u7ea6 0.1053 A<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">342 V<\/td>\n<td style=\"text-align: right;\">1.371 \u03bcs<\/td>\n<td style=\"text-align: right;\">0.1371<\/td>\n<td style=\"text-align: right;\">5.970 \u03bcs<\/td>\n<td style=\"text-align: right;\">2.659 \u03bcs<\/td>\n<td style=\"text-align: right;\">\u7ea6 0.1003 A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 id=\"106\">10.6 \u6b21\u7ea7\u7535\u6d41\u6bd4\u8f93\u51fa\u5927\u5f97\u591a<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>s,pk<\/sub> = (100\/7)\u00d70.4690 \u2248 6.701 A\uff1b\u3000I<sub>s,rms<\/sub> = 6.701\u221a(0.5970\/3) \u2248 2.989 A<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>o<\/sub> = \u00bd\u00d76.701\u00d70.5970 \u2248 2.000 A<\/strong><\/p>\n<p>\u5e73\u5747\u8f93\u51fa\u53ea\u6709 2 A\uff0c\u5374\u9700\u8981\u627f\u53d7\u7ea6 6.70 A \u7684\u6b21\u7ea7\u5cf0\u503c\u548c\u7ea6 2.99 A \u7684\u6b21\u7ea7 RMS\u3002\u4e8c\u6781\u7ba1\u3001\u7ed5\u7ec4\u548c\u7535\u5bb9\u9009\u578b\u90fd\u5fc5\u987b\u770b\u5230\u8fd9\u4e2a\u5dee\u522b\u3002\u628a\u6240\u6709\u6b21\u7ea7\u5143\u4ef6\u90fd\u6309\u201c\u4e94\u4f0f\u4e8c\u5b89\u201d\u9009\u62e9\uff0c\u5f88\u5bb9\u6613\u9020\u6210\u94dc\u7ebf\u3001\u7535\u5bb9\u6216\u6574\u6d41\u5668\u53d1\u70ed\u3002<\/p>\n<h3 id=\"107\">10.7 \u4e34\u754c\u529f\u7387\u548c\u5b9e\u9645\u8fb9\u754c<\/h3>\n<p>\u5728 230 V\u3001VR\u224878.57 V\u3001Lm=1 mH\u3001100 kHz \u4e0b\uff0c\u7406\u60f3\u4e34\u754c\u9001\u80fd\u529f\u7387\u7ea6\u4e3a 17.15 W\uff0c\u9ad8\u4e8e\u5f53\u524d 11 W\u3002\u8fd9\u4e2a\u7ed3\u8bba\u53ea\u9488\u5bf9\u6b63\u5e38\u8f93\u51fa\u7535\u538b\u548c\u540d\u4e49\u53c2\u6570\u3002\u8f93\u51fa\u964d\u4f4e\u3001\u7535\u611f\u4e0e\u9891\u7387\u504f\u9ad8\u3001\u5cf0\u503c\u8fc7\u6d41\u4ee5\u53ca\u63a7\u5236\u5ef6\u65f6\u90fd\u53ef\u80fd\u6d88\u8017\u4f59\u91cf\u3002<\/p>\n<p>\u5982\u679c\u8f93\u51fa\u77ed\u8def\uff0c\u4e0d\u80fd\u4ecd\u628a VR \u5f53\u4f5c 78.57 V\u3002\u4ec5\u9760\u4e8c\u6781\u7ba1\u538b\u964d\u4e0e\u7ed5\u7ec4\u7535\u963b\uff0c\u9000\u78c1\u901f\u5ea6\u4f1a\u663e\u8457\u53d8\u6162\uff0c\u53ef\u80fd\u8fdb\u5165\u975e\u9884\u671f CCM\u3002\u63a7\u5236\u5668\u4fdd\u62a4\u5e94\u9650\u5236\u80fd\u91cf\u5e76\u7ed9\u4e88\u5145\u5206\u9000\u78c1\u65f6\u95f4\uff0c\u8bbe\u8ba1\u8005\u5fc5\u987b\u9a8c\u8bc1\u77ed\u8def\u6ce2\u5f62\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-06-dcm-example.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"220V\u4ea4\u6d41\u8f6c5V\u4e3b\u7b97\u4f8b\u5728230V\u6bcd\u7ebf\u4e0b\u7684\u7535\u6d41\u7535\u538b\u548c\u78c1\u5bc6\u65f6\u5e8f\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-06-dcm-example.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h2 id=\"_7\">\u5341\u4e00\u3001\u7528\u4e3b\u7b97\u4f8b\u5b8c\u6210\u78c1\u82af\u3001\u531d\u6570\u3001\u7535\u611f\u548c\u6c14\u9699\u8bbe\u8ba1<\/h2>\n<h3 id=\"111\">11.1 \u5148\u770b\u4f0f\u79d2\uff0c\u518d\u770b\u78c1\u82af\u5cf0\u503c<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394B<sub>e<\/sub> = 230\u00d72.039\/(100\u00d730) \u2248 0.1563 T<\/strong><\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394B<sub>local<\/sub> \u2248 230\u00d72.039\/(100\u00d727) \u2248 0.1737 T<\/strong><\/p>\n<p>Ae \u7ed9\u7b49\u6548\u5e73\u5747\u53d8\u5316\u91cf\uff0cAmin \u7528\u4e8e\u8f83\u4fdd\u5b88\u7684\u5c40\u90e8\u68c0\u67e5\u3002DCM \u8d77\u59cb\u52b1\u78c1\u7535\u6d41\u8fd1\u96f6\uff0c\u4f46\u6750\u6599\u5269\u78c1\u3001\u975e\u7ebf\u6027\u548c\u5bc4\u751f\u632f\u8361\u4e0d\u4e00\u5b9a\u4ee4\u8d77\u59cb B \u6070\u597d\u4e3a\u96f6\uff0c\u6240\u4ee5\u4e0d\u80fd\u628a \u0394B \u5f53\u4f5c\u65e0\u6761\u4ef6\u7684\u7edd\u5bf9\u5cf0\u503c\u4fdd\u8bc1\u3002\u9ad8\u6e29 Bsat\u3001\u6750\u6599\u635f\u8017\u66f2\u7ebf\u3001\u9650\u6d41\u548c\u5f02\u5e38\u4f0f\u79d2\u90fd\u8981\u518d\u68c0\u67e5\u3002<\/p>\n<h3 id=\"112-al\">11.2 \u7528 AL \u628a\u76ee\u6807\u7535\u611f\u8f6c\u6210\u91c7\u8d2d\u6761\u4ef6<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>A<sub>L,target<\/sub> = L<sub>m<\/sub>\/N<sub>p<\/sub>\u00b2 = 1000000\/10000 = 100 nH\/\u531d\u00b2<\/strong><\/p>\n<p>\u91c7\u8d2d\u65f6\u6700\u6709\u610f\u4e49\u7684\u662f\u5b8c\u6574\u78c1\u82af\u578b\u53f7\u3001\u6750\u6599\u3001\u6c14\u9699\u65b9\u5f0f\u548c AL \u516c\u5dee\uff0c\u800c\u4e0d\u662f\u53ea\u5199\u4e00\u4e2a\u5916\u5f62\u4ee3\u53f7\u3002\u88c5\u914d\u540e\u7528\u4e00\u767e\u531d\u5b8c\u6574\u521d\u7ea7\u5b9e\u6d4b Lm\uff0c\u786e\u8ba4\u88c5\u82af\u538b\u529b\u3001\u80f6\u5c42\u4e0e\u6c14\u9699\u4e00\u81f4\u3002\u6d4b\u91cf\u9891\u7387\u3001\u6d4b\u8bd5\u5e45\u503c\u548c\u5176\u4ed6\u7ed5\u7ec4\u5f00\u8def\u72b6\u6001\u90fd\u8981\u8bb0\u5f55\u3002<\/p>\n<h3 id=\"113\">11.3 \u7406\u60f3\u7b49\u6548\u603b\u6c14\u9699\u4f30\u7b97<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>L<sub>m<\/sub> \u2248 \u03bc\u2080N<sub>p<\/sub>\u00b2A<sub>e<\/sub>\/g<sub>eff<\/sub>\uff1b\u3000g<sub>eff<\/sub> \u2248 \u03bc\u2080N<sub>p<\/sub>\u00b2A<sub>e<\/sub>\/L<sub>m<\/sub><\/strong><\/p>\n<p>\u4ee3\u5165 Np=100\u3001Ae=30 mm\u00b2\u3001Lm=1 mH\uff0c\u5f97\u5230 geff\u22480.377 mm\u3002\u8fd9\u662f\u6c14\u9699\u4e3b\u5bfc\u3001\u5ffd\u7565\u8fb9\u7f18\u78c1\u573a\u548c\u78c1\u82af\u6709\u9650\u78c1\u963b\u7684\u7b49\u6548\u4f30\u7b97\u3002\u5b83\u4e0d\u662f\u201c\u5728\u4e24\u7247\u78c1\u82af\u6bcf\u4e2a\u63a5\u9762\u90fd\u57ab 0.377 mm\u201d\u7684\u65bd\u5de5\u6307\u4ee4\u3002<\/p>\n<p>\u4e2d\u5fc3\u67f1\u5f00\u9699\u4e0e\u6574\u4e2a\u63a5\u9762\u57ab\u7247\u4f1a\u5f62\u6210\u4e0d\u540c\u7684\u603b\u78c1\u963b\u548c\u6f0f\u78c1\u7ed3\u6784\u3002\u8fb9\u7f18\u78c1\u901a\u4f1a\u6269\u5927\u6709\u6548\u6c14\u9699\u9762\u79ef\uff0c\u5e76\u4f7f\u9644\u8fd1\u5bfc\u4f53\u4ea4\u6d41\u635f\u8017\u589e\u52a0\u3002\u5b9e\u9645\u5e94\u4f18\u5148\u9009\u62e9\u6709\u89c4\u5b9a AL \u7684\u4f9b\u5e94\u5546\u6c14\u9699\u4ef6\uff0c\u518d\u901a\u8fc7\u88c5\u914d\u6d4b\u91cf\u4fee\u6b63\u3002<\/p>\n<h3 id=\"114\">11.4 \u4e3a\u4ec0\u4e48\u6c14\u9699\u9644\u8fd1\u7684\u94dc\u7ebf\u53ef\u80fd\u7279\u522b\u70ed<\/h3>\n<p>\u6c14\u9699\u4e0d\u662f\u7edd\u5bf9\u65e0\u78c1\u573a\u7684\u7a7a\u767d\u533a\u3002\u8fb9\u7f18\u78c1\u573a\u4f1a\u4f38\u51fa\u4e2d\u5fc3\u67f1\u5e76\u7a7f\u8fc7\u9644\u8fd1\u5bfc\u7ebf\uff0c\u4ea7\u751f\u6da1\u6d41\u548c\u90bb\u8fd1\u6548\u5e94\u3002\u79bb\u6c14\u9699\u5f88\u8fd1\u7684\u5bbd\u94dc\u7b94\u6216\u7c97\u7ebf\u5c24\u5176\u53ef\u80fd\u51fa\u73b0\u5c40\u90e8\u635f\u8017\uff0c\u5373\u4f7f\u6574\u4e2a\u7ed5\u7ec4 DCR \u770b\u8d77\u6765\u5f88\u5c0f\u3002<\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u7ed5\u7ec4\u4f4d\u7f6e\u3001\u964d\u4f4e\u5bfc\u4f53\u5c3a\u5bf8\u3001\u4f18\u5316\u6c14\u9699\u5206\u5e03\u548c\u9009\u62e9\u9002\u5f53\u9aa8\u67b6\u7f13\u89e3\uff0c\u4f46\u4e0d\u80fd\u7b80\u5355\u628a\u7ed5\u7ec4\u8fdc\u79bb\u78c1\u82af\u6240\u6709\u533a\u57df\u3002\u5e94\u6309\u7167\u5177\u4f53\u78c1\u8def\u548c\u6c14\u9699\u7ed3\u6784\u8bbe\u8ba1\uff0c\u5e76\u5bf9\u70ed\u70b9\u505a\u5b9e\u6d4b\u3002\u78c1\u82af\u8868\u9762\u6e29\u5ea6\u4f4e\u5e76\u4e0d\u81ea\u52a8\u4ee3\u8868\u9644\u8fd1\u5bfc\u7ebf\u6ca1\u6709\u8fc7\u70ed\u3002<\/p>\n<h3 id=\"115\">11.5 \u6709\u6548\u53c2\u6570\u4e0d\u80fd\u7528\u5916\u5f62\u5c3a\u5bf8\u4ee3\u66ff<\/h3>\n<p>\u78c1\u82af\u9ad8\u5ea6\u6216\u4e2d\u67f1\u5916\u89c2\u4e0d\u80fd\u76f4\u63a5\u5f53 Ae\u3002\u7a97\u53e3\u9762\u79ef\u8fd8\u8981\u6263\u9664\u9aa8\u67b6\u3001\u6321\u5899\u3001\u7edd\u7f18\u548c\u5f15\u7ebf\u7a7a\u95f4\u3002Ae\u3001Amin\u3001Ve\u3001AL \u548c\u9aa8\u67b6\u7a97\u53e3\u6765\u81ea\u5382\u5bb6\u6570\u636e\u6216\u660e\u786e\u6d4b\u91cf\uff1b\u672c\u6587\u7528\u7684\u6570\u5b57\u662f\u4e3a\u4e86\u6f14\u793a\u6d41\u7a0b\uff0c\u4e0d\u4ee3\u8868\u4efb\u610f\u67d0\u4e2a\u78c1\u82af\u7cfb\u5217\u5929\u7136\u5177\u6709\u8fd9\u4e9b\u53c2\u6570\u3002<\/p>\n<h2 id=\"_8\">\u5341\u4e8c\u3001\u53cd\u6fc0\u7ed5\u7ec4\u600e\u4e48\u7ed5\uff1a\u4ece\u666e\u901a\u5206\u5c42\u5230\u4e09\u660e\u6cbb<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-07-winding.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u53cd\u6fc0P1\u2014S\u2014P2\u2014A\u5206\u5c42\u3001\u5f15\u811a\u3001\u540c\u540d\u7aef\u548c\u4e32\u8054\u5173\u7cfb\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-07-winding.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"121-ps\">12.1 \u666e\u901a P\u2014S \u548c\u4e09\u660e\u6cbb\u6709\u4ec0\u4e48\u533a\u522b<\/h3>\n<p>P\u2014S \u5148\u7ed5\u5b8c\u6574\u521d\u7ea7\u3001\u7edd\u7f18\u540e\u518d\u7ed5\u6b21\u7ea7\uff0c\u5de5\u827a\u7b80\u5355\u4f46\u5e73\u5747\u7ed5\u7ec4\u8ddd\u79bb\u53ef\u80fd\u8f83\u5927\u3002\u4e09\u660e\u6cbb\u628a\u4e00\u4e2a\u7ed5\u7ec4\u62c6\u6210\u4e24\u6bb5\uff0c\u7528\u53e6\u4e00\u7ed5\u7ec4\u5939\u5728\u4e2d\u95f4\uff1b\u53cd\u6fc0\u4e2d\u5e38\u89c1 P1\u2014S\u2014P2\uff0c\u4f7f\u521d\u7ea7\u5b89\u531d\u5206\u5e03\u5728\u6b21\u7ea7\u4e24\u4fa7\uff0c\u901a\u5e38\u80fd\u964d\u4f4e\u6f0f\u78c1\u573a\u50a8\u80fd\u4e0e\u6f0f\u611f\u3002<\/p>\n<p>\u5b83\u4e0d\u662f\u628a\u4e24\u534a\u521d\u7ea7\u5e76\u8054\u3002\u4e24\u6bb5\u540c\u5411\u4e32\u8054\u540e\u603b\u531d\u6570\u4ecd\u4e3a Np\uff0c\u6d41\u8fc7\u540c\u4e00\u4e2a\u521d\u7ea7\u7535\u6d41\uff0c\u6bcf\u6bb5\u90fd\u8981\u6309\u5b8c\u6574\u521d\u7ea7 RMS \u9009\u7ebf\u3002P1=50T\u3001P2=50T \u7684\u603b\u521d\u7ea7\u662f 100T\uff0c\u4e0d\u662f\u4e24\u4e2a 100T\uff0c\u4e5f\u4e0d\u662f\u4e94\u5341\u531d\u53cc\u7ebf\u3002<\/p>\n<h3 id=\"122\">12.2 \u4e3b\u7b97\u4f8b\u9010\u6b65\u7ed5\u6cd5<\/h3>\n<p>\u5148\u89c4\u5b9a\u4ece\u5f15\u811a\u4fa7\u89c2\u5bdf\u7684\u65b9\u5411\uff0c\u5e76\u5728\u56fe\u7eb8\u4e0a\u5b9a\u4e49\u521d\u7ea7\u70b9\u7aef 1 \u811a\u3002P1 \u4ece 1 \u5230 2 \u7ed5\u4e94\u5341\u531d\uff1b\u5b8c\u6210\u521d\u6b21\u7ea7\u7edd\u7f18\u540e\uff0c\u6b21\u7ea7\u4ece 5 \u811a\u70b9\u7aef\u5230 6 \u811a\u975e\u70b9\u7aef\u7ed5\u4e03\u531d\uff1b\u518d\u5b8c\u6210\u53e6\u4e00\u9053\u521d\u6b21\u7ea7\u7edd\u7f18\uff0cP2 \u4ece 2 \u5230 3 \u7ed5\u4e94\u5341\u531d\uff0c\u4e0e P1 \u4e32\u8054\u52a9\u78c1\u30021\u20143 \u4e3a\u5b8c\u6574\u521d\u7ea7\uff0c2 \u4e3a\u4e2d\u95f4\u8fde\u63a5\u70b9\u3002<\/p>\n<p>\u672c\u56fe\u6b21\u7ea7 5 \u811a\u70b9\u7aef\u8fde\u63a5\u8f93\u51fa\u8d1f\u7aef\uff0c6 \u811a\u975e\u70b9\u7aef\u63a5\u6574\u6d41\u5668\u9633\u6781\u3002\u8f85\u52a9\u7ed5\u7ec4\u540c\u6837\u89c4\u5b9a\u70b9\u7aef 7 \u4e0e\u975e\u70b9\u7aef 8\uff0c\u4f7f\u5176\u5728\u6b21\u7ea7\u9001\u80fd\u65f6\u6574\u6d41\u4f9b\u7535\u3002\u7f16\u53f7\u53ea\u7528\u4e8e\u672c\u6587\u793a\u4f8b\uff0c\u4e0d\u80fd\u62ff\u53bb\u5957\u6240\u6709\u9aa8\u67b6\uff0c\u5b9e\u9645 PCB \u5f15\u811a\u5b9a\u4e49\u8981\u4e0e\u78c1\u4ef6\u5de5\u827a\u5361\u5b8c\u5168\u4e00\u81f4\u3002<\/p>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"text-align: right;\">\u987a\u5e8f<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u7ed5\u7ec4<\/th>\n<th style=\"text-align: right;\">\u531d\u6570<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u7aef\u70b9\u4e0e\u68c0\u67e5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: right;\">1<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">P1<\/td>\n<td style=\"text-align: right;\">50T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">1\u25cf\u21922\uff0c\u5b8c\u6574\u521d\u7ea7\u7684\u4e00\u534a<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">2<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7b2c\u4e00\u7edd\u7f18\u754c\u9762<\/td>\n<td style=\"text-align: right;\">\u2014<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6750\u6599\u3001\u8fb9\u8ddd\u3001\u5f15\u7ebf\u5957\u7ba1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">3<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">S<\/td>\n<td style=\"text-align: right;\">7T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">5\u25cf\u21926\uff0c\u6781\u6027\u4f7f\u4e3b\u5f00\u5173\u5bfc\u901a\u65f6\u4e8c\u6781\u7ba1\u622a\u6b62<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">4<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7b2c\u4e8c\u7edd\u7f18\u754c\u9762<\/td>\n<td style=\"text-align: right;\">\u2014<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4e0d\u80fd\u56e0\u4e3a\u5df2\u6709\u7b2c\u4e00\u9053\u5c31\u7701\u7565<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">5<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">P2<\/td>\n<td style=\"text-align: right;\">50T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">2\u21923\uff0c\u4e0e P1 \u4e32\u8054\u52a9\u78c1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">6<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">A<\/td>\n<td style=\"text-align: right;\">20T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">7\u25cf\u21928\uff0c\u8f85\u52a9\u7ed5\u7ec4\u4e0e\u521d\u7ea7\u540c\u4e00\u7535\u4f4d\u533a<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: right;\">7<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5916\u5305\u4e0e\u88c5\u82af<\/td>\n<td style=\"text-align: right;\">\u2014<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">AL\u3001\u7535\u611f\u3001\u531d\u6bd4\u3001\u6781\u6027\u3001\u6f0f\u611f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 id=\"123\">12.3 \u4e32\u8054\u65b9\u5411\u600e\u6837\u786e\u8ba4<\/h3>\n<p>\u4e24\u6bb5\u521d\u7ea7\u5206\u522b\u6d4b\u5f97\u7684\u4f4e\u5e45\u4ea4\u6d41\u7535\u538b\uff0c\u5e94\u5728\u4e32\u8054\u540e\u76f8\u52a0\u3002\u82e5\u76f8\u51cf\uff0c\u6781\u6027\u6216\u63a5\u7ebf\u9519\u4e86\uff1b\u63a5\u8fd1\u62b5\u6d88\u65f6\u603b\u7535\u611f\u5f88\u4f4e\uff0c\u4e0a\u7535\u6781\u5371\u9669\u3002\u4e0d\u8981\u53ea\u8bf4\u201c\u90fd\u662f\u987a\u65f6\u9488\u201d\uff0c\u56e0\u4e3a\u4ece\u4e0d\u540c\u89c2\u5bdf\u9762\u770b\u987a\u65f6\u9488\u4f1a\u53cd\u8f6c\u3002\u56fe\u7eb8\u5fc5\u987b\u5305\u542b\u89c2\u5bdf\u9762\u3001\u8d77\u6b62\u811a\u548c\u70b9\u7aef\u3002<\/p>\n<p>\u6392\u7ebf\u4ece\u5de6\u5230\u53f3\u3001\u4e0b\u4e00\u5c42\u4ece\u53f3\u5230\u5de6\uff0c\u4e0d\u7b49\u4e8e\u7ed5\u4e2d\u67f1\u7684\u7535\u6c14\u7ed5\u5411\u53cd\u5411\u3002\u5206\u5c42\u65f6\u8981\u8fde\u7eed\u4fdd\u6301\u540c\u4e00\u78c1\u52bf\u65b9\u5411\u3002\u5f15\u7ebf\u4ece\u7a97\u53e3\u51fa\u6765\u5f62\u6210\u62bd\u5934\u4e0d\u5e94\u989d\u5916\u7a7f\u8fc7\u78c1\u8def\uff0c\u5426\u5219\u4f1a\u65e0\u610f\u589e\u52a0\u6709\u6548\u531d\u6570\u3002<\/p>\n<h3 id=\"124-rms\">12.4 \u7ebf\u5f84\u6309 RMS \u9009\uff0c\u4e0d\u6309\u8f93\u51fa\u7535\u6d41\u9009<\/h3>\n<p>\u6700\u4f4e\u6bcd\u7ebf\u521d\u7ea7 RMS\u22480.1223 A\uff0c\u6b21\u7ea7 RMS\u22482.989 A\u3002\u82e5\u4ee5 3 A\/mm\u00b2 \u4f5c\u4e3a\u521d\u7b97\u7535\u6d41\u5bc6\u5ea6\uff0c\u521d\u7ea7\u94dc\u9762\u79ef\u81f3\u5c11\u7ea6 0.0408 mm\u00b2\uff0c\u6b21\u7ea7\u81f3\u5c11\u7ea6 0.996 mm\u00b2\u3002\u53ef\u4ee5\u5206\u522b\u8bc4\u4f30\u521d\u7ea7 0.25 mm \u88f8\u94dc\u5355\u7ebf\u3001\u6b21\u7ea7 32 \u80a1 0.20 mm \u88f8\u94dc\u7ec6\u7ebf\uff0c\u603b\u94dc\u9762\u79ef\u7ea6 0.0491 mm\u00b2 \u4e0e 1.005 mm\u00b2\u3002<\/p>\n<p>\u8fd9\u4e9b\u662f\u5019\u9009\uff0c\u4e0d\u662f\u81ea\u52a8\u5408\u683c\u3002\u8fd8\u8981\u68c0\u67e5\u9891\u7387\u4e0b\u7684\u4ea4\u6d41\u7535\u963b\u3001\u5e76\u80a1\u5206\u6d41\u3001\u5b9e\u9645\u7ebf\u675f\u5916\u5f84\u3001\u53ef\u7ed5\u7a97\u53e3\u548c\u710a\u63a5\u3002\u6bcf\u80a1\u90fd\u5e94\u5b8c\u6574\u7ed5\u540c\u6837\u531d\u6570\uff0c\u7aef\u5934\u6f0f\u710a\u4f1a\u51cf\u5c11\u6709\u6548\u622a\u9762\u3002\u771f\u6b63\u5229\u5179\u7ebf\u5e26\u6709\u53d7\u63a7\u6362\u4f4d\u7ed3\u6784\uff0c\u4e0d\u7b49\u540c\u4efb\u610f\u628a\u666e\u901a\u7ec6\u7ebf\u7ede\u5728\u4e00\u8d77\u3002<\/p>\n<h3 id=\"125\">12.5 \u4e09\u660e\u6cbb\u7684\u4ee3\u4ef7\u8981\u4e00\u8d77\u8ba1\u7b97<\/h3>\n<p>\u4e24\u9053\u521d\u6b21\u7ea7\u754c\u9762\u53ef\u80fd\u589e\u5927\u5bc4\u751f\u7535\u5bb9\u548c\u5171\u6a21\u7535\u6d41\uff0c\u8fd8\u589e\u52a0\u7edd\u7f18\u9ad8\u5ea6\u3001\u843d\u811a\u548c\u751f\u4ea7\u6b65\u9aa4\u3002\u6f0f\u611f\u964d\u4f4e\u901a\u5e38\u6709\u5229\u4e8e\u5c16\u5cf0\u548c\u94b3\u4f4d\uff0c\u4f46 EMI \u4e0d\u4e00\u5b9a\u540c\u6b65\u6539\u5584\u3002\u8fd1\u4f3c\u4f4d\u79fb\u7535\u6d41\u4e3a Cps\u00b7dv\/dt\uff1b\u76f8\u90bb\u5c42\u7535\u4f4d\u68af\u5ea6\u4e5f\u4f1a\u5f71\u54cd\u771f\u5b9e\u7535\u5bb9\uff0c\u4e0d\u80fd\u628a\u754c\u9762\u6570\u91cf\u7b80\u5355\u7b49\u540c\u7535\u5bb9\u500d\u6570\u3002<\/p>\n<p>\u5148\u505a P\u2014S \u57fa\u51c6\u6837\u54c1\uff0c\u518d\u505a\u4e09\u660e\u6cbb\u6837\u54c1\uff0c\u5728\u76f8\u540c\u531d\u6570\u3001\u7ebf\u6750\u3001\u6c14\u9699\u548c\u88c5\u82af\u4e0b\u6bd4\u8f83\u6f0f\u611f\u3001\u5bc4\u751f\u7535\u5bb9\u3001\u5c16\u5cf0\u3001\u6548\u7387\u548c\u6e29\u5347\uff0c\u66f4\u80fd\u5224\u65ad\u6536\u76ca\u3002\u4e0d\u8981\u7528\u201c\u9ad8\u7ea7\u7ed5\u6cd5\u201d\u66ff\u4ee3\u6d4b\u91cf\u3002<\/p>\n<h3 id=\"126\">12.6 \u7a97\u53e3\u4e0e\u65bd\u5de5\u8bb0\u5f55<\/h3>\n<p>\u7ed5\u7ec4\u603b\u9ad8\u5ea6\u5305\u62ec P1\u3001S\u3001P2\u3001\u8f85\u52a9\u7ed5\u7ec4\u3001\u5c42\u95f4\u7edd\u7f18\u3001\u4e24\u9053\u9694\u79bb\u7edd\u7f18\u548c\u5916\u5305\u3002\u6392\u7ebf\u5fc5\u987b\u4f7f\u7528\u542b\u7edd\u7f18\u6700\u5927\u5916\u5f84\u53ca\u7ebf\u675f\u5b9e\u6d4b\u5bbd\u539a\uff0c\u4e0d\u80fd\u4f7f\u7528\u88f8\u94dc\u76f4\u5f84\u3002\u6bcf\u5c42\u531d\u6570\u3001\u642d\u63a5\u4f4d\u7f6e\u3001\u8fb9\u7f18\u6321\u5899\u3001\u7ebf\u675f\u5f20\u529b\u548c\u5f15\u51fa\u8def\u7ebf\u8981\u5199\u6e05\u3002<\/p>\n<p>\u7ed5\u5b8c\u5148\u6d4b\u8fde\u901a\u3001DCR \u548c\u531d\u6bd4\uff0c\u518d\u88c5\u82af\u6d4b Lm \u548c\u6f0f\u611f\u3002\u5173\u952e\u5c42\u6b21\u5e94\u62cd\u7167\u5e76\u4fdd\u5b58\u65bd\u5de5\u8bb0\u5f55\uff0c\u907f\u514d\u53ea\u6709\u6700\u7ec8\u5916\u89c2\u3002\u9996\u4ef6\u7ecf\u8fc7\u4fee\u6539\u540e\uff0c\u8981\u540c\u6b65\u66f4\u65b0\u8ba1\u7b97\u8868\u3001\u5f15\u811a\u56fe\u548c\u5de5\u827a\u5361\uff0c\u4e0d\u80fd\u8ba9\u5de5\u7a0b\u5e08\u8bb0\u5fc6\u6210\u4e3a\u552f\u4e00\u89c4\u683c\u3002<\/p>\n<h2 id=\"220-v\">\u5341\u4e09\u3001220 V \u4ea4\u6d41\u8f93\u5165\u524d\u7aef\uff1a\u6865\u5806\u3001\u50a8\u80fd\u4e0e\u6700\u4f4e\u6bcd\u7ebf<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-08-ac-front-end.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u4ea4\u6d41\u8f93\u5165\u3001\u6865\u5f0f\u6574\u6d41\u3001\u50a8\u80fd\u7535\u5bb9\u53ca100Hz\u6bcd\u7ebf\u6ce2\u5f62\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-08-ac-front-end.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"131\">13.1 \u4ece\u4ea4\u6d41\u63d2\u53e3\u5230\u53cd\u6fc0\u6bcd\u7ebf<\/h3>\n<p>\u5178\u578b\u8f93\u5165\u987a\u5e8f\u5305\u62ec\u4fdd\u9669\u4e1d\u3001\u6d6a\u6d8c\u4e0e\u51b2\u51fb\u7535\u6d41\u5904\u7406\u3001EMI \u6ee4\u6ce2\u3001\u6865\u5f0f\u6574\u6d41\u548c\u9ad8\u538b\u50a8\u80fd\u7535\u5bb9\u3002\u4fdd\u9669\u4e1d\u8d1f\u8d23\u89c4\u5b9a\u5f02\u5e38\u6761\u4ef6\u4e0b\u5207\u65ad\u5371\u9669\u7535\u6d41\uff1bMOV \u7528\u4e8e\u9650\u5236\u4e00\u5b9a\u8303\u56f4\u7684\u6d6a\u6d8c\uff1bNTC \u6216\u5176\u4ed6\u9650\u6d41\u65b9\u5f0f\u7528\u4e8e\u7f13\u548c\u7535\u5bb9\u5145\u7535\u51b2\u51fb\uff1b\u5171\u6a21\u7535\u611f\u548c X \u7535\u5bb9\u5904\u7406\u8f93\u5165\u4f20\u5bfc\u5e72\u6270\u3002\u8fd9\u4e9b\u529f\u80fd\u4e0d\u80fd\u7531\u4e00\u53ea\u201c\u4e07\u80fd\u7535\u963b\u201d\u5168\u90e8\u66ff\u4ee3\u3002<\/p>\n<p>\u6865\u5806\u540e\u7684\u8d1f\u7aef\u662f\u70ed\u5730\uff0c\u5b83\u76f8\u5bf9\u4fdd\u62a4\u5730\u6216\u53ef\u89e6\u6478\u8f93\u51fa\u53ef\u80fd\u5904\u4e8e\u5371\u9669\u7535\u4f4d\u3002\u76f4\u6d41\u6bcd\u7ebf\u7ea6\u4e09\u767e\u4f0f\uff0c\u4f46\u89e6\u7535\u98ce\u9669\u4e0d\u4ec5\u7531\u8fd9\u4e2a\u6807\u79f0\u6570\u503c\u51b3\u5b9a\uff0c\u4e5f\u5305\u62ec\u7535\u5bb9\u5b58\u50a8\u80fd\u91cf\u548c\u6545\u969c\u6761\u4ef6\u3002\u8f93\u5165\u65ad\u5f00\u4ee5\u540e\uff0c\u50a8\u80fd\u7535\u5bb9\u4ecd\u53ef\u80fd\u4fdd\u6301\u9ad8\u538b\uff0c\u5fc5\u987b\u8bbe\u8ba1\u653e\u7535\u5e76\u5728\u64cd\u4f5c\u524d\u5b9e\u9645\u6d4b\u91cf\u3002<\/p>\n<h3 id=\"132\">13.2 \u7528\u80fd\u91cf\u5dee\u8ba1\u7b97\u50a8\u80fd\u7535\u5bb9<\/h3>\n<p>\u5f53\u6865\u5806\u4e0d\u518d\u5bfc\u901a\u65f6\uff0c\u7535\u5bb9\u7ed9\u529f\u7387\u7ea7\u4f9b\u7535\uff0c\u8fd1\u4f3c\u6052\u529f\u7387\u653e\u7535\u3002\u7535\u5bb9\u80fd\u91cf\u4e3a \u00bdCV\u00b2\uff0c\u56e0\u6b64\uff1a<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>C<sub>bulk<\/sub> \u2265 2P<sub>in<\/sub>t<sub>discharge<\/sub>\/(V<sub>start<\/sub>\u00b2\u2212V<sub>end<\/sub>\u00b2)<\/strong><\/p>\n<p>50 Hz \u5168\u6ce2\u6574\u6d41\u7684\u6ce2\u5cf0\u95f4\u9694\u7ea6 10 ms\u3002\u6865\u5806\u771f\u5b9e\u5bfc\u901a\u533a\u95f4\u4f1a\u7f29\u77ed\u6709\u6548\u653e\u7535\u65f6\u95f4\uff0c\u4f46\u7528\u6574\u4e2a 10 ms \u521d\u7b97\u8f83\u4fdd\u5b88\u3002\u8981\u6c42\u8f83\u957f\u6389\u7535\u4fdd\u6301\u65f6\u95f4\u65f6\uff0c\u5e94\u5355\u72ec\u4f7f\u7528\u90a3\u4e2a\u65f6\u95f4\uff0c\u4e0d\u80fd\u4ecd\u91c7\u7528\u4e00\u4e2a\u534a\u5468\u671f\u3002<\/p>\n<p>\u6700\u4f4e\u4ea4\u6d41 198 V\u3001\u6865\u5806\u603b\u538b\u964d\u6682\u53d6 2 V\uff0c\u5219 Vstart\u2248278 V\uff1bPin\u224811.765 W\uff0c\u5141\u8bb8\u8c37\u503c\u4e0d\u4f4e\u4e8e 230 V\uff0c\u4ee3\u5165\u5f97\u5230\u7ea6 9.65 \u03bcF \u7684\u7406\u60f3\u6700\u4f4e\u503c\u3002\u9009\u7528 22 \u03bcF \u4f5c\u4e3a\u5019\u9009\u540e\uff0c\u5728\u540c\u4e00\u5047\u8bbe\u4e0b\u8ba1\u7b97\u8c37\u503c\u7ea6\u4e3a 258 V\u3002\u8fd9\u8bf4\u660e\u6700\u4f4e\u8bbe\u8ba1\u6bcd\u7ebf 230 V \u5305\u542b\u8fdb\u4e00\u6b65\u4f59\u91cf\uff0c\u6700\u7ec8\u5e94\u5728\u4f4e\u8f93\u5165\u3001\u6ee1\u8f7d\u3001\u9ad8\u6e29\u53ca\u7535\u5bb9\u5bb9\u5dee\u4e0b\u6d4b\u8bd5\u3002<\/p>\n<h3 id=\"133\">13.3 \u5bb9\u91cf\u591f\u4e86\uff0c\u8fd8\u8981\u770b\u989d\u5b9a\u7535\u538b\u548c\u7eb9\u6ce2\u7535\u6d41<\/h3>\n<p>22 \u03bcF \u4e0d\u662f\u6700\u7ec8\u552f\u4e00\u9009\u578b\u6761\u4ef6\u3002\u7535\u5bb9\u989d\u5b9a\u7535\u538b\u5fc5\u987b\u8986\u76d6\u6700\u9ad8\u6bcd\u7ebf\u3001\u4ea4\u6d41\u8f93\u5165\u5bb9\u5dee\u548c\u8bbe\u8ba1\u6d6a\u6d8c\u7ba1\u7406\u7ed3\u679c\uff1b\u53ef\u8bc4\u4f30 400 V \u6216 450 V \u7b49\u7ea7\uff0c\u4f46\u4e0d\u80fd\u4ec5\u770b 220 V \u540d\u4e49\u8f93\u5165\u5c31\u9009\u62e9 250 V \u7535\u5bb9\u3002\u5bff\u547d\u4e0e\u5185\u90e8\u70ed\u70b9\u3001\u7eb9\u6ce2\u7535\u6d41\u3001\u5b89\u88c5\u73af\u5883\u548c\u5382\u5bb6\u5bff\u547d\u6a21\u578b\u76f8\u5173\uff0c\u4e0d\u80fd\u56fa\u5b9a\u628a\u6bcf\u6b3e\u7535\u5bb9\u90fd\u7528\u540c\u4e00\u500d\u7387\u6362\u7b97\u3002<\/p>\n<p>\u6bcd\u7ebf\u50a8\u80fd\u7535\u5bb9\u627f\u53d7\u6865\u5806\u5145\u7535\u8109\u51b2\u4e0e\u53cd\u6fc0\u9ad8\u9891\u7535\u6d41\u7684\u7ec4\u5408\u3002\u9ad8\u9891\u5c40\u90e8\u65c1\u8def\u53ef\u5e2e\u52a9\u7f29\u5c0f\u5f00\u5173\u56de\u8def\uff0c\u4f46\u4e0d\u66ff\u4ee3\u5927\u7535\u5bb9\u7684\u4f4e\u9891\u50a8\u80fd\u3002\u6d4b\u91cf\u6bcd\u7ebf\u8c37\u503c\u8981\u6ce8\u610f 100 Hz \u5305\u7edc\uff0c\u800c\u4e0d\u662f\u53ea\u5728\u5fae\u79d2\u65f6\u57fa\u4e0b\u770b\u5230\u4e00\u6761\u8fd1\u4f3c\u76f4\u7ebf\u5c31\u5ba3\u5e03\u6bcd\u7ebf\u7a33\u5b9a\u3002<\/p>\n<h3 id=\"134\">13.4 \u6865\u5806\u5e73\u5747\u7535\u6d41\u4e0d\u7b49\u4e8e\u6d6a\u6d8c\u80fd\u529b<\/h3>\n<p>\u6b63\u5e38\u8f93\u5165\u529f\u7387\u53ea\u6709\u5341\u4f59\u74e6\uff0c\u6865\u5806\u4ecd\u53ef\u80fd\u5728\u4e0a\u7535\u65f6\u7ed9\u7a7a\u7535\u5bb9\u5145\u7535\u800c\u51fa\u73b0\u5f88\u9ad8\u77ac\u65f6\u7535\u6d41\u3002\u5e94\u6838\u5bf9\u6865\u5806\u91cd\u590d\u53cd\u538b\u3001\u5e73\u5747\u6574\u6d41\u7535\u6d41\u3001\u975e\u91cd\u590d\u6d6a\u6d8c\u989d\u5b9a\u503c\u3001\u70ed\u6761\u4ef6\u4ee5\u53ca\u4fdd\u9669\u4e1d\u4e0e\u9650\u6d41\u5668\u4ef6\u914d\u5408\u3002\u8f93\u5165\u7535\u6e90\u963b\u6297\u3001\u7535\u5bb9\u5bb9\u91cf\u548c\u4e0a\u7535\u76f8\u4f4d\u90fd\u4f1a\u5f71\u54cd\u5cf0\u503c\u3002<\/p>\n<p>NTC \u70ed\u6001\u963b\u503c\u5f88\u5c0f\uff0c\u77ed\u65f6\u95f4\u5173\u673a\u518d\u5f00\u673a\u65f6\u53ef\u80fd\u65e0\u6cd5\u50cf\u51b7\u6001\u4e00\u6837\u9650\u6d41\u3002\u82e5\u4ea7\u54c1\u8981\u6c42\u5feb\u901f\u91cd\u590d\u4e0a\u7535\uff0c\u5e94\u9a8c\u8bc1\u8fd9\u79cd\u5de5\u51b5\u3002\u4fdd\u9669\u4e1d\u4e0d\u8d1f\u8d23\u628a\u6bcf\u4e2a\u5fae\u79d2\u7ea7\u5c16\u5cf0\u9650\u5236\u5728\u56fa\u5b9a\u503c\uff0c\u5b83\u7684\u65f6\u95f4\u7535\u6d41\u66f2\u7ebf\u548c\u5206\u65ad\u80fd\u529b\u624d\u662f\u5173\u952e\u3002<\/p>\n<h3 id=\"135\">13.5 \u653e\u7535\u7535\u963b\u600e\u6837\u521d\u7b97<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V(t)=V\u2080e<sup>\u2212t\/(RC)<\/sup>\uff1b\u3000R \u2264 t\/[C\u00b7ln(V\u2080\/V<sub>target<\/sub>)]\uff1b\u3000P<sub>R<\/sub>\u2248V\u00b2\/R<\/strong><\/p>\n<p>\u8fd9\u4e9b\u516c\u5f0f\u53ef\u4f30\u8ba1\u6bcd\u7ebf\u653e\u7535\u65f6\u95f4\u53ca\u5f85\u673a\u529f\u8017\u3002\u653e\u7535\u7535\u963b\u8fd8\u8981\u6ee1\u8db3\u5355\u4f53\u5de5\u4f5c\u7535\u538b\u3001\u8109\u51b2\u4e0e\u6e29\u5ea6\u989d\u5b9a\u503c\uff0c\u5e38\u9700\u8981\u591a\u53ea\u4e32\u8054\u3002\u5177\u4f53\u6b8b\u538b\u76ee\u6807\u548c\u65f6\u95f4\u7531\u4ea7\u54c1\u8981\u6c42\u51b3\u5b9a\uff1b\u9009\u5b8c\u963b\u503c\u4ee5\u540e\u8981\u5b9e\u6d4b\uff0c\u4e0d\u5e94\u628a\u6570\u5b66\u8870\u51cf\u5f53\u4f5c\u65ad\u7535\u540e\u53ef\u7acb\u5373\u89e6\u78b0\u7684\u4fdd\u8bc1\u3002<\/p>\n<h3 id=\"136-220-v\">13.6 \u4e0d\u80fd\u628a 220 V \u4e13\u7528\u8bbe\u8ba1\u5192\u5145\u5bbd\u8f93\u5165<\/h3>\n<p>\u82e5\u5e0c\u671b 85\uff5e265 V AC \u5168\u8303\u56f4\u5de5\u4f5c\uff0c\u6700\u4f4e\u6ce2\u5cf0\u4e0e\u6bcd\u7ebf\u8c37\u503c\u663e\u8457\u4e0b\u964d\uff0c\u5bfc\u901a\u65f6\u95f4\u548c\u4e3b\u5f00\u5173 RMS \u589e\u5927\uff0c\u53d8\u538b\u5668\u3001\u7535\u611f\u548c\u53cd\u9988\u90fd\u8981\u91cd\u7b97\u3002\u6700\u9ad8\u4ea4\u6d41 265 V \u8fd8\u5c06\u63d0\u9ad8\u4e3b\u5f00\u5173\u5e73\u53f0\u548c\u50a8\u80fd\u7535\u5bb9\u5e94\u529b\u3002\u672c\u6587 198\uff5e242 V \u8f93\u5165\u8303\u56f4\u662f\u4e00\u9879\u660e\u786e\u7ea6\u675f\uff0c\u4e0d\u662f\u7701\u7565\u4e86\u4e24\u4e2a\u6570\u5b57\u7684\u5bbd\u8f93\u5165\u89c4\u683c\u3002<\/p>\n<h2 id=\"mosfet\">\u5341\u56db\u3001MOSFET \u9009\u578b\uff1a\u8010\u538b\u3001\u635f\u8017\u3001\u9a71\u52a8\u548c\u52a8\u6001\u5e94\u529b<\/h2>\n<h3 id=\"141\">14.1 \u5148\u5efa\u7acb\u8010\u538b\u9884\u7b97<\/h3>\n<p>\u4e3b\u7b97\u4f8b\u6700\u9ad8\u6bcd\u7ebf\u7ea6 342 V\u3001\u53cd\u5c04\u7535\u538b\u7ea6 78.57 V\uff0c\u7406\u60f3\u5173\u65ad\u5e73\u53f0\u7ea6 421 V\u3002\u82e5 RCD \u7684\u7535\u5bb9\u94b3\u4f4d\u7535\u538b\u4ee5\u6bcd\u7ebf\u4e3a\u53c2\u8003\u9009\u5728 140 V \u5de6\u53f3\uff0c\u6f0f\u6781\u94b3\u4f4d\u5e73\u53f0\u7ea6\u4e3a\u6bcd\u7ebf\u52a0 140 V\uff0c\u5373\u6700\u9ad8\u7ea6 482 V\uff0c\u518d\u8003\u8651\u7eb9\u6ce2\u3001\u4e8c\u6781\u7ba1\u52a8\u6001\u4e0e\u5e03\u5c40\u5c16\u5cf0\u3002<\/p>\n<p>\u53ef\u4ee5\u8bc4\u4f30 650 V \u7b49\u7ea7 MOSFET\uff0c\u4f46\u8fd9\u53ea\u662f\u5019\u9009\u8010\u538b\u7b49\u7ea7\uff0c\u4e0d\u4ee3\u8868\u6240\u6709 650 V \u5668\u4ef6\u90fd\u5408\u9002\u3002\u5fc5\u987b\u68c0\u67e5\u5b9e\u6d4b\u6700\u9ad8\u7535\u538b\u4e0e\u989d\u5b9a\u503c\u4e4b\u95f4\u7684\u4f59\u91cf\u3001\u542f\u52a8\u4e0e\u77ed\u8def\u3001\u6e29\u5ea6\u3001\u5b9e\u9645\u6d6a\u6d8c\u4ee5\u53ca\u5f00\u5173\u901f\u5ea6\u3002\u6709\u4e9b\u5e94\u7528\u9700\u8981\u66f4\u9ad8\u8010\u538b\u6216\u66f4\u4f4e\u94b3\u4f4d\uff0c\u4e0d\u80fd\u5957\u56fa\u5b9a\u767e\u5206\u6bd4\u53d6\u4ee3\u6ce2\u5f62\u6d4b\u8bd5\u3002<\/p>\n<h3 id=\"142\">14.2 \u5bfc\u901a\u635f\u8017<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>cond<\/sub> \u2248 I<sub>p,rms<\/sub>\u00b2R<sub>DS(on),hot<\/sub><\/strong><\/p>\n<p>\u4e3b\u7b97\u4f8b\u6700\u4f4e\u6bcd\u7ebf\u521d\u7ea7 RMS \u7ea6 0.122 A\uff0c\u56e0\u6b64\u4e0d\u4e00\u5b9a\u9700\u8981\u8ffd\u6c42\u6781\u4f4e\u5bfc\u901a\u7535\u963b\u7684\u5927\u82af\u7247\u3002\u5927\u82af\u7247\u53ef\u80fd\u5e26\u6765\u66f4\u9ad8 Qg\u3001Coss \u548c\u6210\u672c\uff0c\u5728\u5341\u74e6\u7535\u6e90\u4e2d\u53cd\u800c\u4e0d\u5212\u7b97\u3002\u82e5\u70ed\u6001 RDS(on)=3 \u03a9\uff0c\u521d\u7b97\u5bfc\u901a\u635f\u8017\u7ea6 45 mW\uff1b\u771f\u6b63\u9009\u578b\u8fd8\u8981\u628a\u6e29\u5347\u4e0b\u7684\u963b\u503c\u4e0e\u6570\u636e\u624b\u518c\u9a71\u52a8\u7535\u538b\u5bf9\u5e94\u8d77\u6765\u3002<\/p>\n<p>\u4e0d\u80fd\u4f7f\u7528\u201c\u5178\u578b\u56db\u70b9\u4e94\u4f0f\u6d4b\u8bd5\u963b\u503c\u201d\u53bb\u63a8\u65ad\u5341\u4f0f\u9a71\u52a8\u6216\u53cd\u8fc7\u6765\u3002\u6805\u6781\u9608\u503c\u4ec5\u8bf4\u660e\u5f00\u59cb\u5fae\u5f31\u5bfc\u7535\uff0c\u4e0d\u8868\u793a\u5df2\u7ecf\u5145\u5206\u5bfc\u901a\u3002\u9a71\u52a8\u5668\u3001\u6805\u6781\u7535\u963b\u548c\u6e90\u6781\u516c\u5171\u7535\u611f\u4e5f\u4f1a\u5f71\u54cd\u5b9e\u9645\u5f00\u901a\u72b6\u6001\u3002<\/p>\n<h3 id=\"143-i2r\">14.3 \u5f00\u5173\u635f\u8017\u4e0d\u80fd\u53ea\u7b97 I\u00b2R<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>overlap<\/sub> \u2248 \u00bdV<sub>DS<\/sub>I<sub>D<\/sub>(t<sub>r<\/sub>+t<sub>f<\/sub>)f<sub>s<\/sub><\/strong><\/p>\n<p>\u8fd9\u662f\u7c97\u7565\u7684\u7535\u538b\u7535\u6d41\u91cd\u53e0\u4f30\u7b97\uff0c\u4e0d\u662f\u5b8c\u6574 MOSFET \u635f\u8017\u6a21\u578b\u3002DCM \u5f00\u901a\u65f6\u52b1\u78c1\u7535\u6d41\u5c0f\uff0cCoss \u653e\u7535\u5374\u4ecd\u53ef\u80fd\u6d88\u8017\u80fd\u91cf\uff1bCCM \u5f00\u901a\u53ef\u80fd\u8fd8\u5305\u542b\u6b21\u7ea7\u6062\u590d\u7535\u6d41\u3002\u975e\u7ebf\u6027\u8f93\u51fa\u7535\u5bb9\u5e94\u4f18\u5148\u53c2\u8003\u5668\u4ef6 Eoss \u66f2\u7ebf\uff0c\u4e0d\u80fd\u628a\u67d0\u4e2a\u5355\u70b9 Coss \u7528\u5728\u6240\u6709\u7535\u538b\u4e0a\u3002<\/p>\n<p>\u82e5\u4f7f\u7528 Eoss\u00b7fs \u4f30\u7b97\u786c\u5f00\u901a\u635f\u8017\uff0c\u518d\u7528\u6d4b\u5f97\u5f00\u5173\u80fd\u91cf\u79ef\u5206\uff0c\u5e94\u907f\u514d\u91cd\u590d\u8ba1\u5165\u540c\u4e00\u90e8\u5206\u3002\u771f\u6b63\u51c6\u786e\u7684\u65b9\u6cd5\u662f\u5728\u5408\u9002\u6d4b\u91cf\u6761\u4ef6\u4e0b\u5f97\u5230 vDS \u4e0e iD \u7684\u65f6\u95f4\u5bf9\u9f50\uff0c\u79ef\u5206\u6bcf\u6b21\u5f00\u5173\u80fd\u91cf\uff0c\u5e76\u8003\u8651\u63a2\u5934\u5ef6\u65f6\u8bef\u5dee\u3002<\/p>\n<h3 id=\"144\">14.4 \u6805\u6781\u9a71\u52a8\u529f\u7387\u4e0e\u6805\u6781\u7535\u963b<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>gate<\/sub>\u2248Q<sub>g<\/sub>V<sub>drive<\/sub>f<sub>s<\/sub><\/strong><\/p>\n<p>Qg=12 nC\u3001\u9a71\u52a8 10 V\u3001100 kHz \u65f6\uff0c\u9a71\u52a8\u80fd\u91cf\u9884\u7b97\u7ea6 12 mW\u3002\u5b83\u5206\u5e03\u5728\u9a71\u52a8\u5668\u3001\u6805\u6781\u7535\u963b\u548c MOSFET \u5185\u963b\u4e2d\uff0c\u4e0d\u5e94\u5168\u90e8\u5f53\u4f5c\u82af\u7247\u7ed3\u533a\u635f\u8017\u3002\u9a71\u52a8\u5cf0\u503c\u7535\u6d41\u53d6\u51b3\u4e8e\u7c73\u52d2\u5e73\u53f0\u3001\u9a71\u52a8\u5668\u8f93\u51fa\u963b\u6297\u4e0e\u5916\u7f6e\u7535\u963b\u3002<\/p>\n<p>\u6805\u6781\u7535\u963b\u8fc7\u5c0f\uff0c\u53ef\u80fd\u63d0\u9ad8 dv\/dt \u548c\u632f\u94c3\uff1b\u8fc7\u5927\u53c8\u63d0\u9ad8\u5173\u65ad\u91cd\u53e0\u635f\u8017\u3002\u53ef\u91c7\u7528\u4e8c\u6781\u7ba1\u533a\u5206\u5f00\u901a\u4e0e\u5173\u65ad\u901f\u5ea6\uff0c\u4f46\u8981\u9a8c\u8bc1\u5168\u90e8\u5de5\u51b5\u3002\u6805\u6781\u4e0b\u62c9\u3001\u7535\u6e90\u53bb\u8026\u548c\u77ed\u800c\u72ec\u7acb\u7684\u6e90\u6781\u56de\u8def\u90fd\u5e94\u5728\u5e03\u5c40\u9636\u6bb5\u843d\u5b9e\u3002<\/p>\n<h3 id=\"145\">14.5 \u70ed\u8bbe\u8ba1\u4e0e\u5668\u4ef6\u5c01\u88c5<\/h3>\n<p>\u5c0f\u529f\u7387\u53cd\u6fc0\u7684 MOSFET \u5e73\u5747\u635f\u8017\u53ef\u80fd\u4e0d\u9ad8\uff0c\u4f46\u5c16\u5cf0\u3001\u8109\u51b2\u548c\u5c01\u88c5\u94dc\u9762\u79ef\u4ecd\u5f88\u91cd\u8981\u3002\u7ed3\u5230\u73af\u5883\u70ed\u963b\u53d6\u51b3\u4e8e\u6d4b\u8bd5\u677f\u548c\u94dc\u9762\u79ef\uff0c\u6570\u636e\u624b\u518c\u7684\u67d0\u4e2a\u6570\u503c\u4e0d\u7b49\u4e8e\u5b9e\u9645 PCB\u3002\u628a\u70ed\u635f\u8017\u9884\u7b97\u3001\u94dc\u533a\u548c\u6700\u9ad8\u73af\u5883\u6e29\u5ea6\u4e00\u8d77\u8003\u8651\uff0c\u518d\u901a\u8fc7\u58f3\u6e29\u548c\u70ed\u6a21\u578b\u4f30\u7b97\u7ed3\u6e29\u3002<\/p>\n<p>\u6563\u70ed\u94dc\u4e0d\u8981\u8d8a\u8fc7\u9694\u79bb\u8fb9\u754c\uff0c\u4e5f\u4e0d\u8981\u4e3a\u4e86\u6563\u70ed\u628a\u6f0f\u6781\u5927\u9762\u79ef\u94fa\u5230\u53cd\u9988\u533a\u57df\u3002\u9ad8 dv\/dt \u6f0f\u6781\u94dc\u9762\u79ef\u8d8a\u5927\uff0c\u7535\u573a\u8026\u5408\u4e0e\u5171\u6a21\u566a\u58f0\u53ef\u80fd\u8d8a\u4e25\u91cd\u3002\u70ed\u4e0e EMI \u5fc5\u987b\u4e00\u8d77\u4f18\u5316\u3002<\/p>\n<h2 id=\"_9\">\u5341\u4e94\u3001\u6b21\u7ea7\u6574\u6d41\uff1a\u4e8c\u6781\u7ba1\u4e0e\u540c\u6b65\u6574\u6d41\u7684\u53d6\u820d<\/h2>\n<h3 id=\"151\">15.1 \u4e94\u4f0f\u8f93\u51fa\u4e3a\u4ec0\u4e48\u5f88\u5728\u610f\u538b\u964d<\/h3>\n<p>\u4e3b\u7b97\u4f8b\u4e8c\u6781\u7ba1\u5047\u8bbe\u538b\u964d 0.5 V\uff0c\u5e73\u5747\u7535\u6d41 2 A\uff0c\u635f\u8017\u7ea6 1 W\uff0c\u76f8\u5f53\u4e8e\u8f93\u51fa\u529f\u7387\u7684\u767e\u5206\u4e4b\u5341\u3002\u771f\u5b9e\u538b\u964d\u968f\u8109\u51b2\u7535\u6d41\u4e0e\u6e29\u5ea6\u53d8\u5316\uff0c\u5e94\u4f7f\u7528\u7535\u6d41\u6ce2\u5f62\u79ef\u5206\uff0c\u6216\u8005\u91c7\u7528\u5408\u7406\u7684\u7b49\u6548 VF \u521d\u7b97\uff0c\u800c\u4e0d\u662f\u62ff\u4f4e\u7535\u6d41\u4e0b\u7684\u5178\u578b\u538b\u964d\u3002<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>D<\/sub>\u2248V<sub>F,eq<\/sub>I<sub>o<\/sub>+P<sub>recovery<\/sub>+P<sub>capacitance<\/sub><\/strong><\/p>\n<p>\u8096\u7279\u57fa\u901a\u5e38\u6062\u590d\u8f83\u5feb\uff0c\u4f46\u53cd\u5411\u6f0f\u7535\u3001\u7ed3\u7535\u5bb9\u3001\u989d\u5b9a\u7535\u538b\u548c\u6e29\u5ea6\u4e0a\u9650\u4e5f\u4f1a\u5f71\u54cd\u9009\u578b\u3002\u4f4e VF \u5668\u4ef6\u4e0d\u4e00\u5b9a\u5728\u9ad8\u6e29\u4e0b\u603b\u635f\u8017\u6700\u5c0f\uff0c\u5c24\u5176\u662f\u53cd\u538b\u8f83\u9ad8\u3001\u6e29\u5347\u660e\u663e\u65f6\u3002\u989d\u5b9a\u5e73\u5747\u7535\u6d41\u4e5f\u8981\u5bf9\u5e94\u5b9e\u9645\u6563\u70ed\u6761\u4ef6\u3002<\/p>\n<h3 id=\"152-rms\">15.2 \u5cf0\u503c\u3001RMS \u4e0e\u53cd\u538b\u9010\u9879\u6838\u5bf9<\/h3>\n<p>\u4e3b\u7b97\u4f8b\u6b21\u7ea7\u5cf0\u503c\u7ea6 6.70 A\u3001RMS \u7ea6 2.99 A\u3001\u7406\u60f3\u53cd\u538b\u7ea6 29 V\u3002\u53ef\u8bc4\u4f30 60 V \u6216\u66f4\u9ad8\u7b49\u7ea7\u6574\u6d41\u5668\uff0c\u4f46\u5e94\u6839\u636e\u5b9e\u6d4b\u632f\u94c3\u4e0e\u8f93\u51fa\u5f02\u5e38\u51b3\u5b9a\u3002\u8010\u538b\u5347\u9ad8\u53ef\u80fd\u727a\u7272 VF \u548c\u6548\u7387\uff0c\u9009\u578b\u4e0d\u662f\u4e00\u5473\u52a0\u5927\u53c2\u6570\u3002<\/p>\n<p>\u6570\u636e\u624b\u518c\u7684\u975e\u91cd\u590d\u6d6a\u6d8c\u7535\u6d41\u4e0d\u7b49\u540c\u957f\u671f\u5141\u8bb8\u7684\u91cd\u590d\u5cf0\u503c\u3002\u53cd\u6fc0\u6bcf\u79d2\u5341\u4e07\u6b21\u7684\u8109\u51b2\u8981\u7ed3\u5408\u5e73\u5747\u529f\u8017\u3001RMS\u3001\u52a8\u6001\u548c\u7ed3\u6e29\u6838\u5bf9\u3002\u5e76\u8054\u4e8c\u6781\u7ba1\u4e5f\u4e0d\u662f\u81ea\u52a8\u5747\u6d41\uff0cVF \u6e29\u5ea6\u7279\u6027\u4e0e\u5e03\u5c40\u4f1a\u5f71\u54cd\u7535\u6d41\u5206\u914d\u3002<\/p>\n<h3 id=\"153\">15.3 \u540c\u6b65\u6574\u6d41\u600e\u6837\u51cf\u5c11\u538b\u964d<\/h3>\n<p>\u540c\u6b65\u6574\u6d41\u7528 MOSFET \u5728\u6b21\u7ea7\u9001\u80fd\u671f\u95f4\u4ee3\u66ff\u4e8c\u6781\u7ba1\u4e3b\u8981\u5bfc\u7535\u3002\u7406\u60f3\u5bfc\u901a\u635f\u8017\u8fd1\u4f3c Is,rms\u00b2RDS(on)\uff0c\u4f4e\u538b\u5927\u7535\u6d41\u65f6\u80fd\u660e\u663e\u964d\u4f4e\u635f\u8017\u3002\u4f46\u5b83\u589e\u52a0\u63a7\u5236\u5668\u3001\u9a71\u52a8\u3001\u68c0\u6d4b\u548c\u6b7b\u533a\uff0c\u4e14\u4e0d\u80fd\u4e0e\u4e3b\u5f00\u5173\u540c\u65f6\u5f62\u6210\u5371\u9669\u7684\u53cd\u5411\u5bfc\u901a\u72b6\u6001\u3002<\/p>\n<p>DCM \u4e2d\u63a7\u5236\u5668\u5e94\u5728\u7535\u6d41\u63a5\u8fd1\u96f6\u65f6\u53ca\u65f6\u5173\u95ed\u540c\u6b65\u7ba1\uff0c\u907f\u514d\u8f93\u51fa\u7535\u5bb9\u53cd\u5411\u5411\u78c1\u4ef6\u9001\u80fd\uff1bCCM \u4e2d\u5e94\u6b63\u786e\u5904\u7406\u4e0b\u4e00\u6b21\u4e3b\u5f00\u5173\u5f00\u901a\u524d\u7684\u5173\u65ad\u3002\u8f7b\u8f7d\u3001\u8f93\u51fa\u77ed\u8def\u3001\u632f\u94c3\u548c\u591a\u6a21\u5f0f\u5207\u6362\u90fd\u662f\u9a8c\u8bc1\u91cd\u70b9\u3002<\/p>\n<h3 id=\"154-mosfet\">15.4 \u4e0d\u80fd\u628a\u4e8c\u6781\u7ba1\u5220\u6389\u540e\u76f4\u63a5\u63a5\u4e00\u53ea MOSFET<\/h3>\n<p>MOSFET \u4f53\u4e8c\u6781\u7ba1\u65b9\u5411\u3001\u6f0f\u6e90\u68c0\u6d4b\u3001\u9a71\u52a8\u7535\u4f4d\u548c\u63a7\u5236\u903b\u8f91\u5fc5\u987b\u5339\u914d\u5177\u4f53\u62d3\u6251\u3002\u67d0\u4e9b\u65b9\u6848\u5229\u7528\u4f53\u4e8c\u6781\u7ba1\u5148\u5efa\u7acb\u9001\u80fd\uff0c\u518d\u7531\u63a7\u5236\u5668\u5f00\u542f\u6c9f\u9053\uff1b\u68c0\u6d4b\u7ebf\u5fc5\u987b\u907f\u514d\u516c\u5171\u529f\u7387\u94dc\u538b\u964d\u5e72\u6270\u3002\u5b9e\u9645\u5de5\u4f5c\u7ec6\u8282\u4f9d\u8d56\u540c\u6b65\u6574\u6d41\u82af\u7247\uff0c\u4e0d\u80fd\u4ece\u57fa\u672c\u53cd\u6fc0\u56fe\u76f4\u63a5\u63a8\u65ad\u6240\u6709\u5f15\u811a\u8fde\u63a5\u3002<\/p>\n<p>\u5982\u679c\u6539\u6210\u540c\u6b65\u6574\u6d41\uff0cVo\u2032\u3001\u53cd\u5c04\u7535\u538b\u3001\u635f\u8017\u9884\u7b97\u3001\u9000\u78c1\u4e0e\u8f85\u52a9\u4f9b\u7535\u90fd\u5e94\u91cd\u65b0\u8ba1\u7b97\u3002\u4e4b\u524d\u56fa\u5b9a 0.5 V \u7684\u5047\u8bbe\u4e0d\u80fd\u7ee7\u7eed\u4f7f\u7528\uff0c\u800c\u5e94\u4ee5\u6c9f\u9053\u548c\u8fde\u63a5\u7535\u963b\u538b\u964d\u5efa\u7acb\u65b0\u6a21\u578b\u3002<\/p>\n<h2 id=\"esrrms\">\u5341\u516d\u3001\u8f93\u51fa\u7535\u5bb9\uff1a\u5bb9\u91cf\u3001ESR\u3001RMS \u548c\u77ac\u6001\u4e00\u8d77\u7b97<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-09-capacitor.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u6b21\u7ea7\u9001\u80fd\u7535\u6d41\u3001\u8d1f\u8f7d\u7535\u6d41\u548c\u8f93\u51fa\u7535\u5bb9\u7535\u6d41\u53ca\u7eb9\u6ce2\u7ec4\u6210\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-09-capacitor.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"161\">16.1 \u5148\u6c42\u7535\u5bb9\u7535\u6d41<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>i<sub>C<\/sub>(t)=i<sub>s<\/sub>(t)\u2212I<sub>o<\/sub>\uff1b\u3000I<sub>C,rms<\/sub>=\u221a(I<sub>s,rms<\/sub>\u00b2\u2212I<sub>o<\/sub>\u00b2)<\/strong><\/p>\n<p>\u540e\u4e00\u5f0f\u5047\u5b9a\u8f93\u51fa\u8d1f\u8f7d\u7535\u6d41\u8fd1\u4f3c\u6052\u5b9a\u4e14\u5468\u671f\u5e73\u5747\u6b21\u7ea7\u7535\u6d41\u7b49\u4e8e Io\u3002\u4e3b\u7b97\u4f8b\u5f97\u5230 IC,rms\u22482.221 A\uff0c\u660e\u663e\u5927\u4e8e\u4e24\u5b89\u8f93\u51fa\u7684\u4e00\u4e9b\u76f4\u89c9\u4f30\u8ba1\u3002\u7535\u5bb9\u7ec4\u9700\u8981\u6ee1\u8db3\u7eb9\u6ce2\u7535\u6d41\u3001\u6e29\u5347\u548c\u5bff\u547d\uff0c\u5355\u770b\u603b\u5fae\u6cd5\u6570\u4e0d\u591f\u3002<\/p>\n<h3 id=\"162\">16.2 \u7528\u7535\u8377\u5dee\u6c42\u5bb9\u91cf\u7eb9\u6ce2<\/h3>\n<p>\u7535\u5bb9\u7535\u538b\u53d8\u5316\u7531 \u0394Q\/C \u51b3\u5b9a\u3002\u5728 DCM\uff0c\u6b21\u7ea7\u5173\u95ed\u65f6\u8f93\u51fa\u7535\u5bb9\u4ee5 Io \u653e\u7535\uff1b\u6b21\u7ea7\u9001\u80fd\u672b\u7aef\uff0c\u5982\u679c is \u5df2\u4f4e\u4e8e Io\uff0c\u7535\u5bb9\u4ecd\u7ee7\u7eed\u653e\u7535\uff0c\u76f4\u5230\u4e0b\u4e00\u6b21\u9001\u80fd\u7535\u6d41\u91cd\u65b0\u8d85\u8fc7\u8d1f\u8f7d\u3002\u56e0\u6b64\u4e25\u683c\u8ba1\u7b97\u5e94\u8be5\u5bf9 iC \u6b63\u8d1f\u9762\u79ef\u79ef\u5206\u3002<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394Q<sub>discharge<\/sub> = I<sub>o<\/sub>(1\u2212D<sub>2<\/sub>)T<sub>s<\/sub> + I<sub>o<\/sub>\u00b2D<sub>2<\/sub>T<sub>s<\/sub>\/(2I<sub>s,pk<\/sub>)<\/strong><\/p>\n<p>\u5bf9\u4e3b\u7b97\u4f8b\uff0c\u0394Q\u22489.843 \u03bcC\u3002\u5982\u679c\u6709\u6548\u7535\u5bb9\u4e3a 940 \u03bcF\uff0c\u7406\u60f3\u7eaf\u5bb9\u91cf\u7eb9\u6ce2\u7ea6 10.5 mV\u3002\u8fd9\u4e2a\u503c\u6ca1\u6709\u5305\u542b ESR\u3001ESL\u3001\u5c16\u5cf0\u548c\u63a7\u5236\u5305\u7edc\uff0c\u4e0d\u80fd\u636e\u6b64\u627f\u8bfa\u8f93\u51fa\u5b9e\u9645\u53ea\u6709\u5341\u6beb\u4f0f\u7eb9\u6ce2\u3002<\/p>\n<h3 id=\"163-esr\">16.3 ESR \u7eb9\u6ce2\u5f80\u5f80\u66f4\u5927<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394V<sub>ESR<\/sub>\u2248\u0394i<sub>C<\/sub>\u00b7ESR<\/strong><\/p>\n<p>\u6b21\u7ea7\u5f00\u59cb\u9001\u80fd\u65f6\u7535\u5bb9\u7535\u6d41\u4ece \u22122 A \u8df3\u5230\u7ea6 4.70 A\uff0c\u7406\u60f3\u8df3\u53d8\u91cf\u7ea6 6.70 A\u3002\u82e5\u7535\u5bb9\u7ec4\u5408 ESR \u4e3a 10 m\u03a9\uff0c\u5bf9\u5e94\u9636\u8dc3\u7ea6 67 mV\u3002\u5c3d\u7ba1\u771f\u5b9e\u7535\u6d41\u4e0a\u5347\u4e0d\u662f\u65e0\u7a77\u5feb\uff0c\u8fd9\u4e2a\u4f30\u7b97\u5f88\u597d\u5730\u89e3\u91ca\u4e3a\u4f55\u589e\u5927\u5bb9\u91cf\u540e\u7eb9\u6ce2\u4ecd\u6ca1\u6709\u660e\u663e\u6539\u5584\u3002<\/p>\n<p>ESL \u4e0e\u56de\u8def\u7535\u611f\u8fd8\u4f1a\u4ea7\u751f\u66f4\u5feb\u5c16\u5cf0\uff0c\u53d7\u5e03\u5c40\u3001\u9676\u74f7\u65c1\u8def\u548c\u6d4b\u91cf\u65b9\u5f0f\u5f71\u54cd\u3002\u9009\u7535\u5bb9\u65f6\u5e94\u533a\u5206\u5f00\u5173\u5468\u671f\u952f\u9f7f\u3001ESR \u9636\u8dc3\u3001\u7eb3\u79d2\u5c16\u5cf0\u548c\u4f4e\u9891\u5305\u7edc\uff0c\u9488\u5bf9\u5404\u81ea\u539f\u56e0\u5904\u7406\u3002<\/p>\n<h3 id=\"164\">16.4 \u8d1f\u8f7d\u77ac\u6001\u51b3\u5b9a\u53e6\u4e00\u4e2a\u5bb9\u91cf\u9700\u6c42<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>C<sub>out<\/sub>\u2265\u0394I<sub>load<\/sub>t<sub>response<\/sub>\/\u0394V<sub>allow<\/sub><\/strong><\/p>\n<p>\u82e5\u8d1f\u8f7d\u4ece 1 A \u8df3\u5230 2 A\uff0c\u63a7\u5236\u5c1a\u672a\u589e\u52a0\u4f9b\u80fd\u7684 0.5 ms \u5185\u5141\u8bb8\u8f93\u51fa\u4e0b\u964d 0.25 V\uff0c\u5219\u7b80\u5316\u5bb9\u91cf\u9700\u6c42\u4e3a 2000 \u03bcF\u3002\u5b83\u6bd4\u5468\u671f\u7eb9\u6ce2\u7b97\u51fa\u7684\u5bb9\u91cf\u5927\uff0c\u56e0\u4e3a\u53cd\u6620\u4e0d\u540c\u65f6\u95f4\u5c3a\u5ea6\u3002\u771f\u5b9e\u54cd\u5e94\u968f\u73af\u8def\u3001\u6a21\u5f0f\u548c\u7535\u6e90\u4f59\u91cf\u53d8\u5316\uff0c\u5e94\u5728\u8d1f\u8f7d\u9636\u8dc3\u6d4b\u8bd5\u4e2d\u786e\u8ba4\u3002<\/p>\n<p>\u7535\u5bb9\u589e\u5927\u4e5f\u4f1a\u6539\u53d8\u73af\u8def\u6781\u70b9\u3001\u542f\u52a8\u65f6\u95f4\u548c\u9650\u6d41\u4f9b\u7535\u65f6\u95f4\u3002\u4e0d\u80fd\u65e0\u9650\u52a0\u7535\u5bb9\u4f5c\u4e3a\u6240\u6709\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\u3002\u8f93\u51fa\u7535\u5bb9\u7ec4\u53d8\u5316\u540e\u8981\u91cd\u65b0\u6838\u5bf9\u8865\u507f\u3001\u542f\u52a8\u8fc7\u51b2\u548c\u77ed\u8def\u6062\u590d\u3002<\/p>\n<h3 id=\"165\">16.5 \u9676\u74f7\u3001\u7535\u89e3\u4e0e\u805a\u5408\u7269\u5982\u4f55\u7ec4\u5408<\/h3>\n<p>\u9676\u74f7\u9002\u5408\u9ad8\u9891\u65c1\u8def\uff0c\u5bb9\u91cf\u53ef\u80fd\u56e0\u76f4\u6d41\u504f\u538b\u663e\u8457\u4e0b\u964d\uff1b\u7535\u89e3\u63d0\u4f9b\u5927\u5bb9\u91cf\uff0c\u4f46 ESR\u3001\u4f4e\u6e29\u4e0e\u5bff\u547d\u8981\u5173\u6ce8\uff1b\u805a\u5408\u7269\u53ef\u964d\u4f4e ESR\uff0c\u4f46\u989d\u5b9a\u7535\u538b\u3001\u6d6a\u6d8c\u548c\u6210\u672c\u9700\u68c0\u67e5\u3002\u5e76\u8054\u7ec4\u5408\u8981\u8003\u8651\u7535\u6d41\u5206\u914d\u4e0e\u53ef\u80fd\u7684\u8c10\u632f\uff0c\u4e0d\u80fd\u53ea\u628a\u6807\u79f0\u5bb9\u91cf\u7b80\u5355\u76f8\u52a0\u3002<\/p>\n<p>\u8f93\u51fa\u7aef\u548c\u8d1f\u8f7d\u7aef\u4e5f\u4e0d\u662f\u6c38\u8fdc\u540c\u4e00\u4e2a\u8282\u70b9\u3002\u7ebf\u7f06\u3001\u8fde\u63a5\u5668\u548c\u540e\u7ea7\u6ee4\u6ce2\u4f1a\u5e26\u6765\u538b\u964d\u4e0e\u989d\u5916\u52a8\u6001\u3002\u82e5\u8981\u6c42\u8d1f\u8f7d\u7aef\u7cbe\u786e 5 V\uff0c\u5c31\u8981\u660e\u786e\u53cd\u9988\u91c7\u6837\u4f4d\u7f6e\u548c\u5141\u8bb8\u7ebf\u635f\uff0c\u4e0d\u80fd\u53ea\u5728\u7535\u6e90 PCB \u7a7a\u8f7d\u7aef\u6d4b\u5230\u4e94\u4f0f\u4fbf\u5224\u5408\u683c\u3002<\/p>\n<h2 id=\"rcd\">\u5341\u4e03\u3001RCD \u94b3\u4f4d\uff1a\u5148\u5f04\u6e05\u7535\u538b\u5b9a\u4e49\uff0c\u518d\u7b97\u963b\u5bb9<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-10-rcd.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u6bcd\u7ebf\u56de\u63a5RCD\u94b3\u4f4d\u7535\u8def\u3001\u53cd\u5c04\u5e73\u53f0\u4e0e\u94b3\u4f4d\u7535\u538b\u5b9a\u4e49\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-10-rcd.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"171\">17.1 \u6f0f\u611f\u4e3a\u4ec0\u4e48\u4ea7\u751f\u5c16\u5cf0<\/h3>\n<p>\u52b1\u78c1\u80fd\u91cf\u901a\u8fc7\u8026\u5408\u8f6c\u5230\u6b21\u7ea7\uff0c\u4f46\u6f0f\u611f\u5bf9\u5e94\u7684\u78c1\u901a\u4e0d\u80fd\u5168\u90e8\u94fe\u63a5\u6b21\u7ea7\u3002MOSFET \u5173\u65ad\u65f6\uff0c\u521d\u7ea7\u6f0f\u611f\u7535\u6d41\u4ecd\u9700\u8def\u5f84\uff0c\u4f1a\u7ed9\u6f0f\u6781\u5bc4\u751f\u7535\u5bb9\u5145\u7535\uff0c\u9020\u6210\u989d\u5916\u5347\u538b\u3002\u82e5\u6ca1\u6709\u53d7\u63a7\u94b3\u4f4d\uff0c\u5b83\u53ef\u80fd\u4f7f\u5f00\u5173\u8fdb\u5165\u96ea\u5d29\u6216\u51fb\u7a7f\u3002<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>E<sub>lk<\/sub>\u2248\u00bdL<sub>lk<\/sub>I<sub>pk<\/sub>\u00b2\uff1b\u3000P<sub>lk,base<\/sub>\u2248\u00bdL<sub>lk<\/sub>I<sub>pk<\/sub>\u00b2f<sub>s<\/sub><\/strong><\/p>\n<p>\u8fd9\u53ea\u662f\u6f0f\u611f\u80fd\u91cf\u57fa\u6570\uff0c\u5b9e\u9645 RCD \u7535\u963b\u635f\u8017\u53ef\u80fd\u5927\u4e8e\u8fd9\u4e2a\u503c\uff0c\u56e0\u4e3a\u94b3\u4f4d\u5728\u6362\u6d41\u671f\u95f4\u8fd8\u4f1a\u5438\u6536\u90e8\u5206\u672c\u6765\u53ef\u4ee5\u9001\u5411\u8f93\u51fa\u7684\u80fd\u91cf\u3002<\/p>\n<h3 id=\"172\">17.2 \u94b3\u4f4d\u7535\u5bb9\u7535\u538b\u4ee5\u6bcd\u7ebf\u4e3a\u53c2\u8003<\/h3>\n<p>\u5e38\u89c1\u56de\u63a5\u6bcd\u7ebf\u7684 RCD \u7ed3\u6784\u4e3a\uff1a\u6f0f\u6781\u7ecf\u5feb\u6062\u590d\u94b3\u4f4d\u4e8c\u6781\u7ba1\u63a5\u5230\u94b3\u4f4d\u8282\u70b9\uff0cR \u4e0e C \u5e76\u8054\u8fde\u63a5\u8be5\u8282\u70b9\u5230\u6bcd\u7ebf\u6b63\u7aef\u3002\u5b9a\u4e49 VK \u4e3a\u94b3\u4f4d\u7535\u5bb9\u4e24\u7aef\u3001\u4e5f\u5c31\u662f\u76f8\u5bf9\u4e8e\u6bcd\u7ebf\u6b63\u7aef\u7684\u7535\u538b\u3002\u94b3\u4f4d\u65f6\u6f0f\u6781\u7ea6\u4e3a Vin+VK\uff0c\u4e0d\u662f VK \u672c\u8eab\u3002<\/p>\n<p>\u6b63\u5e38\u9001\u80fd\u65f6\u521d\u7ea7\u53cd\u5c04\u5e73\u53f0\u4e3a Vin+VR\uff0c\u6240\u4ee5\u5fc5\u987b VK&gt;VR\uff0c\u94b3\u4f4d\u624d\u4e0d\u4f1a\u4e00\u76f4\u62a2\u8d70\u6b63\u5e38\u52b1\u78c1\u80fd\u91cf\u3002\u628a\u67d0\u8d44\u6599\u91cc\u201c\u603b\u6f0f\u6781\u94b3\u4f4d\u7535\u538b\u201d\u4e0e\u672c\u6587\u201c\u7535\u5bb9\u76f8\u5bf9\u6bcd\u7ebf\u7535\u538b\u201d\u6df7\u7528\uff0c\u4f1a\u7b97\u51fa\u5b8c\u5168\u4e0d\u540c\u751a\u81f3\u4e0d\u6210\u7acb\u7684\u963b\u5bb9\u3002<\/p>\n<h3 id=\"173\">17.3 \u8fd1\u4f3c\u529f\u8017\u4e0e\u7535\u963b<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>P<sub>RCD<\/sub>\u2248\u00bdL<sub>lk<\/sub>I<sub>pk<\/sub>\u00b2f<sub>s<\/sub>\u00b7V<sub>K<\/sub>\/(V<sub>K<\/sub>\u2212V<sub>R<\/sub>)\uff1b\u3000R\u2248V<sub>K<\/sub>\u00b2\/P<sub>RCD<\/sub><\/strong><\/p>\n<p>\u8be5\u5f0f\u5047\u5b9a\u94b3\u4f4d\u7535\u538b\u7eb9\u6ce2\u8f83\u5c0f\u3001\u6f0f\u611f\u7535\u6d41\u8fd1\u4f3c\u7ebf\u6027\u4e0b\u964d\u3001\u5668\u4ef6\u538b\u964d\u53ef\u5ffd\u7565\u3002\u5b83\u9002\u5408\u4f5c\u4e3a\u521d\u503c\uff0c\u6700\u7ec8\u8981\u6d4b\u7535\u5bb9\u7535\u538b\u3001\u7535\u963b\u53d1\u70ed\u548c\u6f0f\u6781\u5cf0\u503c\u3002VK \u8d8a\u63a5\u8fd1 VR\uff0c\u5206\u6bcd\u8d8a\u5c0f\uff0c\u635f\u8017\u4f1a\u663e\u8457\u589e\u52a0\uff1b\u63d0\u9ad8 VK \u53ef\u4ee5\u964d\u4f4e\u8fd9\u90e8\u5206\u635f\u8017\uff0c\u5374\u63d0\u9ad8 MOSFET \u7535\u538b\u5e94\u529b\u3002<\/p>\n<h3 id=\"174-rcd\">17.4 \u4e3b\u7b97\u4f8b\u7684 RCD \u6570\u5b57<\/h3>\n<p>\u5047\u5b9a\u6298\u7b97\u521d\u7ea7\u6f0f\u611f Llk=20 \u03bcH\uff0c\u5373\u52b1\u78c1\u7535\u611f\u7684\u767e\u5206\u4e4b\u4e8c\u3002Ipk\u22480.469 A\u3001100 kHz\uff0c\u57fa\u7840\u6f0f\u611f\u529f\u7387\u7ea6 0.22 W\u3002\u9009\u62e9 VK=140 V\u3001VR\u224878.57 V\uff0c\u521d\u7b97 PRCD\u22480.501 W\uff0cR\u224839.1 k\u03a9\uff0c\u53ef\u4ee5\u8bc4\u4f30 39 k\u03a9 \u7535\u963b\u7ec4\u5408\u3002<\/p>\n<p>\u7535\u963b\u7ec4\u5408\u5fc5\u987b\u6ee1\u8db3\u6301\u7eed\u529f\u8017\u3001\u8109\u51b2\u3001\u5de5\u4f5c\u7535\u538b\u548c\u70ed\u6761\u4ef6\u3002\u7528\u4e00\u53ea\u666e\u901a\u5c0f\u5c01\u88c5\u7535\u963b\u627f\u62c5\u534a\u74e6\u4e14\u957f\u671f\u5de5\u4f5c\u5728\u9ad8\u538b\u5dee\u4e0b\uff0c\u53ef\u80fd\u4e0d\u5408\u9002\uff1b\u4e32\u8054\u591a\u53ea\u65e2\u53ef\u5206\u914d\u7535\u538b\uff0c\u4e5f\u53ef\u5206\u6563\u70ed\uff0c\u4f46\u4ecd\u8981\u6309\u5404\u5668\u4ef6\u989d\u5b9a\u503c\u68c0\u67e5\u3002<\/p>\n<h3 id=\"175\">17.5 \u94b3\u4f4d\u7535\u5bb9\u4e0e\u7eb9\u6ce2<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>C<sub>K<\/sub>\u2248V<sub>K<\/sub>\/(\u0394V<sub>K<\/sub>Rf<sub>s<\/sub>)<\/strong><\/p>\n<p>\u82e5\u5141\u8bb8\u7ea6 14 V \u5cf0\u5cf0\u7eb9\u6ce2\uff0cR\u224839 k\u03a9\u3001100 kHz\uff0c\u521d\u7b97\u81f3\u5c11\u7ea6 2.56 nF\uff0c\u53ef\u8bc4\u4f30 3.3 nF\u3002\u7528 3.3 nF \u4f30\u7b97\u7eb9\u6ce2\u7ea6 10.9 V\uff0cRC \u65f6\u95f4\u5e38\u6570\u7ea6 129 \u03bcs\uff0c\u5927\u4e8e 10 \u03bcs \u5f00\u5173\u5468\u671f\uff0c\u7b26\u5408\u4f4e\u7eb9\u6ce2\u8fd1\u4f3c\u7684\u57fa\u672c\u65b9\u5411\u3002<\/p>\n<p>\u9009\u62e9\u5b9e\u9645\u7535\u5bb9\u9700\u770b\u989d\u5b9a\u7535\u538b\u3001\u8109\u51b2\u7535\u6d41\u3001\u4ecb\u8d28\u7a33\u5b9a\u6027\u548c\u5bb9\u5dee\u3002\u94b3\u4f4d\u4e8c\u6781\u7ba1\u8fd8\u8981\u770b\u53cd\u538b\u3001\u6b63\u5411\u6062\u590d\u3001\u91cd\u590d\u8109\u51b2\u7535\u6d41\u548c\u5e03\u5c40\u3002MOSFET\u3001\u4e8c\u6781\u7ba1\u548c\u7535\u5bb9\u5f62\u6210\u7684\u6362\u6d41\u73af\u8def\u5fc5\u987b\u77ed\uff0c\u4e0d\u80fd\u9760\u589e\u5927\u7535\u5bb9\u6765\u63a9\u76d6\u957f\u8d70\u7ebf\u5c16\u5cf0\u3002<\/p>\n<h3 id=\"176\">17.6 \u4e3a\u4ec0\u4e48\u8fd9\u4e2a\u7b97\u4f8b\u9700\u8981\u8fed\u4ee3\u6548\u7387<\/h3>\n<p>\u5148\u524d\u603b\u635f\u8017\u9884\u7b97\u4e3a 1.765 W\uff0c\u6574\u6d41\u7ea6 1 W\uff0cRCD \u5df2\u7ea6 0.501 W\uff0c\u5269\u4f59\u53ea\u6709\u7ea6 0.264 W \u7ed9\u78c1\u82af\u3001\u94dc\u7ebf\u3001MOSFET\u3001\u63a7\u5236\u4e0e\u8f93\u5165\u3002\u8fd9\u53ef\u80fd\u4e0d\u591f\u3002\u56e0\u6b64 85% \u6548\u7387\u76ee\u6807\u4e0d\u80fd\u5728\u8fd9\u4e00\u8f6e\u53c2\u6570\u4e0b\u76f4\u63a5\u5ba3\u5e03\u8fbe\u6210\u3002<\/p>\n<p>\u53ef\u901a\u8fc7\u964d\u4f4e\u6f0f\u611f\u3001\u4f18\u5316\u7ed5\u7ec4\u3001\u91c7\u7528\u66f4\u4f4e\u635f\u8017\u6574\u6d41\u6216\u540c\u6b65\u6574\u6d41\u3001\u8c03\u6574 VK \u4e0e\u8010\u538b\u3001\u6539\u8fdb\u63a7\u5236\u5f85\u673a\u529f\u8017\u7b49\u8fed\u4ee3\u3002\u82e5\u6700\u7ec8\u53ea\u80fd\u8fbe\u5230 80%\uff0c\u5e94\u636e\u6b64\u91cd\u7b97\u8f93\u5165\u50a8\u80fd\u548c\u70ed\u9884\u7b97\uff1b\u6587\u7ae0\u4fdd\u7559\u8fd9\u4e00\u77db\u76fe\uff0c\u662f\u4e3a\u4e86\u793a\u8303\u771f\u5b9e\u8bbe\u8ba1\u5982\u4f55\u53d1\u73b0\u95ee\u9898\uff0c\u800c\u4e0d\u662f\u7ed9\u51fa\u770b\u4f3c\u5b8c\u7f8e\u5374\u4e0d\u81ea\u6d3d\u7684\u6570\u5b57\u3002<\/p>\n<h2 id=\"rc-tvs\">\u5341\u516b\u3001RC \u5438\u6536\u3001TVS \u4e0e\u6709\u6e90\u94b3\u4f4d\u5206\u522b\u89e3\u51b3\u4ec0\u4e48<\/h2>\n<h3 id=\"181-rcd-rc\">18.1 RCD \u9650\u6700\u9ad8\u7535\u538b\uff0cRC \u4e3b\u8981\u963b\u5c3c\u632f\u94c3<\/h3>\n<p>RCD \u7528\u6709\u65b9\u5411\u6027\u7684\u8def\u5f84\u56de\u6536\u5e76\u8017\u6563\u6f0f\u611f\u6362\u6d41\u80fd\u91cf\uff0c\u9650\u5236\u6f0f\u6781\u9ad8\u7535\u538b\u3002RC \u4e32\u8054\u5438\u6536\u901a\u5e38\u7528\u4e8e\u7ed9\u4e00\u4e2a\u5bc4\u751f LC \u7f51\u7edc\u589e\u52a0\u963b\u5c3c\uff0c\u4f7f\u632f\u94c3\u8870\u51cf\u3002\u4e8c\u8005\u53ef\u4ee5\u540c\u65f6\u5b58\u5728\uff0c\u4f46\u4e0d\u80fd\u76f4\u63a5\u8ba4\u4e3a\u591a\u88c5\u4e00\u7ec4 RC \u5c31\u4e00\u5b9a\u89e3\u51b3\u6240\u6709\u5c16\u5cf0\u3002<\/p>\n<p>RC \u53ef\u80fd\u8de8\u5728 MOSFET\u3001\u521d\u7ea7\u6216\u6b21\u7ea7\u6574\u6d41\u5668\u9644\u8fd1\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u5e0c\u671b\u963b\u5c3c\u54ea\u4e2a\u7f51\u7edc\u3002\u4f4d\u7f6e\u4e0d\u540c\uff0c\u7535\u5bb9\u627f\u53d7\u7684\u7535\u538b\u6446\u5e45\u4e0e\u529f\u8017\u4e0d\u540c\u3002\u8de8\u4e3b\u5f00\u5173\u7684\u5927\u7535\u5bb9\u53ef\u80fd\u6bcf\u6b21\u5145\u653e\u7535\u90fd\u589e\u52a0\u635f\u8017\uff0c\u5e94\u5148\u6d4b\u518d\u8c03\u3002<\/p>\n<h3 id=\"182\">18.2 \u4ece\u632f\u94c3\u9891\u7387\u4f30\u8ba1\u5bc4\u751f\u53c2\u6570<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>f<sub>ring<\/sub>\u22481\/(2\u03c0\u221a(L<sub>par<\/sub>C<sub>par<\/sub>))<\/strong><\/p>\n<p>\u5728\u540c\u4e00\u632f\u94c3\u8282\u70b9\u52a0\u5165\u5df2\u77e5\u6d4b\u8bd5\u7535\u5bb9 Ct\uff0c\u82e5\u9891\u7387\u4ece f1 \u964d\u5230 f2\uff0c\u53ef\u8fd1\u4f3c\u5f97\u5230\uff1a<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>C<sub>par<\/sub>\u2248C<sub>t<\/sub>\/[(f\u2081\/f\u2082)\u00b2\u22121]\uff1b\u3000L<sub>par<\/sub>\u22481\/[(2\u03c0f\u2081)\u00b2C<sub>par<\/sub>]<\/strong><\/p>\n<p>\u8fd9\u4e2a\u65b9\u6cd5\u5047\u5b9a\u632f\u94c3\u4e3b\u8981\u6765\u81ea\u4e00\u4e2a\u53ef\u8fd1\u4f3c\u96c6\u4e2d\u7684 LC\uff0c\u5668\u4ef6\u975e\u7ebf\u6027\u548c\u63a2\u5934\u8d1f\u8f7d\u4f1a\u9020\u6210\u8bef\u5dee\u3002\u4e3b\u5f00\u5173 Coss \u968f\u7535\u538b\u53d8\u5316\uff0c\u56e0\u6b64\u4f30\u7b97\u503c\u662f\u5de5\u4f5c\u70b9\u9644\u8fd1\u7b49\u6548\u53c2\u6570\uff0c\u4e0d\u662f\u4e00\u4e2a\u4ece\u96f6\u5230\u51e0\u767e\u4f0f\u6052\u5b9a\u4e0d\u53d8\u7684\u7535\u5bb9\u3002<\/p>\n<h3 id=\"183\">18.3 \u5438\u6536\u7535\u963b\u521d\u503c\u4e0e\u529f\u8017<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>R<sub>snub,start<\/sub>\u2248\u221a(L<sub>par<\/sub>\/C<sub>eq<\/sub>)<\/strong><\/p>\n<p>\u8be5\u503c\u5bf9\u5e94\u7279\u5f81\u963b\u6297\u7684\u91cf\u7ea7\uff0c\u53ef\u4f5c\u4e3a\u8bd5\u9a8c\u8d77\u70b9\uff0c\u4e0d\u662f\u901a\u7528\u7cbe\u786e\u963b\u5c3c\u89e3\u3002\u8c03\u6574 R \u548c C \u65f6\u540c\u65f6\u89c2\u5bdf\u5c16\u5cf0\u8870\u51cf\u3001\u5f00\u5173\u635f\u8017\u3001\u5438\u6536\u7535\u963b\u6e29\u5347\u548c\u6548\u7387\u3002\u7535\u5bb9\u8d8a\u5927\u5f80\u5f80\u963b\u5c3c\u66f4\u660e\u663e\uff0c\u4f46\u6bcf\u5468\u671f\u5145\u653e\u7535\u4ee3\u4ef7\u4e5f\u589e\u52a0\u3002<\/p>\n<p>\u7c97\u7565\u80fd\u91cf\u53ef\u7528 \u00bdC\u0394V\u00b2 \u4f30\u7b97\u4e00\u6b21\u5145\u7535\u91cf\uff1b\u82e5\u6bcf\u5468\u671f\u8fd8\u901a\u8fc7\u7535\u963b\u5b8c\u6210\u76f8\u5e94\u653e\u7535\uff0c\u603b\u8017\u6563\u53ef\u80fd\u63a5\u8fd1 C\u0394V\u00b2fs\u3002\u5e94\u6839\u636e\u5b9e\u9645\u8fde\u63a5\u4e0e\u7535\u538b\u6ce2\u5f62\u51b3\u5b9a\uff0c\u4e0d\u8981\u56fa\u5b9a\u628a\u6240\u6709\u5438\u6536\u7535\u5bb9\u529f\u8017\u90fd\u5199\u6210\u540c\u4e00\u534a\u7cfb\u6570\u3002<\/p>\n<h3 id=\"184-tvs\">18.4 TVS \u94b3\u4f4d\u8981\u68c0\u67e5\u6301\u7eed\u91cd\u590d\u80fd\u91cf<\/h3>\n<p>TVS \u7684\u8109\u51b2\u5cf0\u503c\u529f\u7387\u989d\u5b9a\u503c\u901a\u5e38\u5bf9\u5e94\u7279\u5b9a\u6ce2\u5f62\uff0c\u4e0d\u4ee3\u8868\u80fd\u591f\u6bcf\u79d2\u5341\u4e07\u6b21\u5438\u6536\u76f8\u540c\u5cf0\u503c\u3002\u7528\u4e8e\u53cd\u6fc0\u6f0f\u611f\u94b3\u4f4d\u65f6\uff0c\u5e94\u6838\u5bf9\u51fb\u7a7f\u5bb9\u5dee\u3001\u52a8\u6001\u94b3\u4f4d\u3001\u7535\u5bb9\u3001\u91cd\u590d\u5e73\u5747\u529f\u8017\u548c\u70ed\u6761\u4ef6\u3002\u989d\u5b9a\u201c\u516d\u767e\u74e6\u201d\u4e0d\u7b49\u4e8e\u53ef\u4ee5\u627f\u53d7\u516d\u767e\u74e6\u8fde\u7eed\u8017\u6563\u3002<\/p>\n<p>\u82e5 TVS \u94b3\u4f4d\u70b9\u592a\u4f4e\uff0c\u4f1a\u5438\u6536\u6b63\u5e38\u9001\u80fd\uff1b\u592a\u9ad8\u5219 MOSFET \u4f59\u91cf\u4e0d\u8db3\u3002\u5b83\u53ef\u5728\u67d0\u4e9b\u529f\u7387\u8303\u56f4\u7b80\u5316\u94b3\u4f4d\uff0c\u4e5f\u53ef\u7528\u4e8e\u5f02\u5e38\u4fdd\u62a4\uff0c\u4f46\u4e0d\u80fd\u4ec5\u770b\u6807\u7b7e\u7535\u538b\u5c31\u66ff\u4ee3 RCD \u5206\u6790\u3002<\/p>\n<h3 id=\"185\">18.5 \u6709\u6e90\u94b3\u4f4d\u4e0e\u53cc\u7ba1\u53cd\u6fc0<\/h3>\n<p>\u6709\u6e90\u94b3\u4f4d\u53cd\u6fc0\u589e\u52a0\u94b3\u4f4d\u5f00\u5173\u4e0e\u7535\u5bb9\uff0c\u901a\u8fc7\u53d7\u63a7\u80fd\u91cf\u6d41\u6539\u5584\u6f0f\u611f\u80fd\u91cf\u5229\u7528\u548c\u5f00\u5173\u6761\u4ef6\u3002\u5b83\u53ef\u80fd\u5b9e\u73b0\u66f4\u4f4e\u635f\u8017\u548c\u8f83\u9ad8\u9891\u7387\uff0c\u4f46\u4f9d\u8d56\u94b3\u4f4d\u65f6\u5e8f\u3001\u8c10\u632f\u548c\u8f7b\u8f7d\u7b56\u7565\uff0c\u4e0d\u80fd\u5728\u5355\u7ba1\u7535\u8def\u65c1\u8fb9\u968f\u610f\u52a0\u4e00\u53ea MOSFET \u5c31\u8ba4\u4e3a\u5b8c\u6210\u5347\u7ea7\u3002<\/p>\n<p>\u53cc\u7ba1\u53cd\u6fc0\u901a\u8fc7\u4e24\u4e2a\u5f00\u5173\u4e0e\u56de\u9988\u4e8c\u6781\u7ba1\u6539\u53d8\u94b3\u4f4d\u65b9\u5f0f\uff0c\u901a\u5e38\u589e\u52a0\u5668\u4ef6\u548c\u9a71\u52a8\u590d\u6742\u5ea6\u3002\u5b83\u4e0e\u53cc\u5f00\u5173\u6b63\u6fc0\u4e0d\u662f\u540c\u4e00\u62d3\u6251\uff0c\u80fd\u91cf\u4ecd\u91c7\u7528\u53cd\u6fc0\u50a8\u80fd\u548c\u91ca\u653e\u65f6\u5e8f\u3002\u9009\u54ea\u4e00\u79cd\u8981\u6bd4\u8f83\u8f93\u5165\u8303\u56f4\u3001\u529f\u7387\u3001\u6210\u672c\u3001\u63a7\u5236\u8d44\u6e90\u4e0e\u6548\u7387\u76ee\u6807\u3002<\/p>\n<h2 id=\"_10\">\u5341\u4e5d\u3001\u63a7\u5236\u5668\u4e0e\u7535\u6d41\u91c7\u6837\uff1a\u8ba9\u8ba1\u7b97\u843d\u5230\u771f\u5b9e\u8109\u51b2\u4e0a<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-11-control.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u5cf0\u503c\u7535\u6d41\u6a21\u5f0f\u63a7\u5236\u3001\u91c7\u6837\u6ee4\u6ce2\u3001\u9650\u6d41\u548c\u5916\u73af\u7684\u5173\u7cfb\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-11-control.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"191\">19.1 \u5cf0\u503c\u7535\u6d41\u63a7\u5236\u7684\u5185\u5916\u4e24\u5c42<\/h3>\n<p>\u6bcf\u5468\u671f\u5f00\u59cb\uff0c\u63a7\u5236\u5668\u7f6e\u4f4d\u6805\u6781\uff1b\u521d\u7ea7\u7535\u6d41\u4e0a\u5347\uff0c\u91c7\u6837\u7535\u538b\u8fbe\u5230\u7535\u6d41\u6307\u4ee4\u65f6\u5173\u65ad\u3002\u672c\u5468\u671f\u5cf0\u503c\u56e0\u6b64\u7531\u91c7\u6837\u5185\u73af\u9650\u5236\u3002\u8f93\u51fa\u7535\u538b\u8bef\u5dee\u7ecf\u8fc7\u53cd\u9988\u5916\u73af\u8c03\u6574\u8fd9\u4e2a\u5cf0\u503c\u6307\u4ee4\uff0c\u4f7f\u5e73\u5747\u8f93\u51fa\u80fd\u91cf\u6ee1\u8db3\u8d1f\u8f7d\u3002<\/p>\n<p>\u5916\u73af\u4e0d\u5e94\u76f4\u63a5\u8ffd\u968f\u6bcf\u4e2a\u5f00\u5173\u5c16\u5cf0\uff0c\u5b83\u4e3b\u8981\u54cd\u5e94\u8f83\u4f4e\u9891\u7387\u8f93\u51fa\u8bef\u5dee\u3002\u5185\u73af\u4e5f\u4e0d\u662f\u5b8c\u6574\u5e73\u5747\u7535\u6d41\u63a7\u5236\uff0c\u6b63\u5e38\u5cf0\u503c\u4e0e\u5e73\u5747\u8f93\u5165\u7535\u6d41\u5173\u7cfb\u968f\u8f93\u5165\u3001\u6a21\u5f0f\u548c\u9891\u7387\u53d8\u5316\u3002\u7406\u89e3\u8fd9\u4e24\u5c42\u53ef\u4ee5\u89e3\u91ca\u4e3a\u4ec0\u4e48\u67d0\u7535\u6e90\u7535\u6d41\u6ce2\u5f62\u6bcf\u5468\u671f\u53d8\u5316\uff0c\u5374\u8f93\u51fa\u7535\u538b\u7a33\u5b9a\u3002<\/p>\n<h3 id=\"192\">19.2 \u91c7\u6837\u7535\u963b\u521d\u7b97<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>R<sub>CS<\/sub>\u2248V<sub>CS,limit<\/sub>\/I<sub>limit,target<\/sub>\uff1b\u3000P<sub>CS<\/sub>\u2248I<sub>p,rms<\/sub>\u00b2R<sub>CS<\/sub><\/strong><\/p>\n<p>\u5982\u679c\u5047\u8bbe\u67d0\u63a7\u5236\u5668\u6709\u6548\u9650\u6d41\u9608\u503c\u4e3a 0.75 V\uff0c\u5e0c\u671b\u786c\u4ef6\u76ee\u6807\u5cf0\u503c\u7ea6 0.55 A\uff0c\u5219\u540d\u4e49\u7535\u963b\u7ea6 1.36 \u03a9\u3002\u8fd9\u91cc\u7684 0.75 V \u53ea\u662f\u8bf4\u660e\u7b97\u6cd5\u7684\u5047\u8bbe\uff0c\u5b9e\u9645\u5e94\u8bfb\u53d6\u9009\u5b9a\u5668\u4ef6\u9608\u503c\u3001\u5bb9\u5dee\u3001\u6d88\u9690\u548c\u659c\u5761\u6ce8\u5165\u5b9a\u4e49\u3002<\/p>\n<p>\u9650\u6d41\u6700\u5927\u503c\u8fd8\u8981\u8003\u8651\u9608\u503c\u4e0a\u504f\u3001\u91c7\u6837\u7535\u963b\u4e0b\u504f\u3001\u6ee4\u6ce2\u548c\u4f20\u64ad\u5ef6\u65f6\u3002\u78c1\u82af\u9971\u548c\u5e94\u6309\u8fd9\u4e2a\u6700\u5927\u771f\u5b9e\u7535\u6d41\u68c0\u67e5\uff0c\u800c\u4e0d\u662f\u6b63\u5e38\u6ee1\u8f7d 0.469 A\u3002\u4f4e\u8f93\u5165\u8fc7\u8f7d\u4e0e\u9ad8\u8f93\u5165\u5ef6\u65f6\u8fc7\u51b2\u90fd\u53ef\u80fd\u6210\u4e3a\u6700\u574f\u70b9\u3002<\/p>\n<h3 id=\"193\">19.3 \u4f20\u64ad\u5ef6\u65f6\u9020\u6210\u5cf0\u503c\u8fc7\u51b2<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u0394I<sub>delay<\/sub>\u2248V<sub>bus<\/sub>t<sub>delay<\/sub>\/L<sub>m<\/sub><\/strong><\/p>\n<p>342 V\u30011 mH\u3001100 ns \u65f6\u589e\u52a0\u7ea6 34 mA\uff0c\u5df2\u7ecf\u662f\u540d\u4e49\u5cf0\u503c\u7684\u767e\u5206\u4e4b\u4e03\u5de6\u53f3\u3002\u82e5\u6ee4\u6ce2\u6216\u63a7\u5236\u5668\u6d88\u9690\u4f7f\u6709\u6548\u5ef6\u65f6\u66f4\u957f\uff0c\u8fc7\u51b2\u4f1a\u66f4\u5927\u3002\u9ad8\u6bcd\u7ebf\u867d\u7136\u6b63\u5e38\u5bfc\u901a\u65f6\u95f4\u66f4\u77ed\uff0c\u5374\u53ef\u80fd\u5728\u5cf0\u503c\u9650\u5236\u4e0a\u66f4\u4e25\u82db\u3002<\/p>\n<p>\u524d\u6cbf\u6d88\u9690\u662f\u4e3a\u4e86\u907f\u514d\u5f00\u901a\u5c16\u5cf0\u8bef\u89e6\u53d1\uff0c\u5e76\u4e0d\u5e94\u8be5\u906e\u4f4f\u771f\u5b9e\u9971\u548c\u3002\u91c7\u6837 RC \u592a\u5927\u53ef\u80fd\u4f7f\u63a7\u5236\u5668\u6765\u4e0d\u53ca\u770b\u5230\u7535\u6d41\u5feb\u901f\u4e0a\u5347\u3002\u8c03\u8bd5\u65f6\u8981\u540c\u65f6\u770b\u539f\u59cb\u91c7\u6837\u548c\u6ee4\u6ce2\u540e\u5f15\u811a\u6ce2\u5f62\uff0c\u660e\u786e\u7a76\u7adf\u662f\u566a\u58f0\u8fd8\u662f\u5ef6\u65f6\u3002<\/p>\n<h3 id=\"194-kelvin\">19.4 Kelvin \u91c7\u6837\u548c\u70ed\u5730\u5206\u533a<\/h3>\n<p>\u91c7\u6837\u7535\u963b\u7684\u68c0\u6d4b\u5f15\u7ebf\u5e94\u4ece\u89c4\u5b9a\u7aef\u70b9\u5355\u72ec\u53d6\u51fa\uff0c\u907f\u514d\u4e0e\u4e3b\u529f\u7387\u56de\u6d41\u5171\u7528\u4e00\u6bb5\u9ad8\u7535\u6d41\u94dc\u76ae\u3002\u63a7\u5236\u5668\u5730\u4e0e\u529f\u7387\u5730\u5728\u5408\u9002\u7684\u4f4d\u7f6e\u6c47\u5408\uff1b\u6805\u6781\u9a71\u52a8\u8fd4\u56de\u4e5f\u5e94\u907f\u514d\u628a\u5927\u7535\u6d41\u5c16\u5cf0\u5e26\u8fdb\u8bef\u5dee\u653e\u5927\u5668\u548c\u53cd\u9988\u3002<\/p>\n<p>\u7535\u963b\u7684\u5bc4\u751f\u7535\u611f\u4f1a\u5728 di\/dt \u65f6\u4ea7\u751f\u989d\u5916\u7535\u538b\uff0c\u56e0\u6b64\u5c01\u88c5\u4e0e\u8d70\u7ebf\u548c\u963b\u503c\u4e00\u6837\u91cd\u8981\u3002\u4f7f\u7528\u957f\u5f15\u7ebf\u7535\u963b\u53ef\u80fd\u5f97\u5230\u6f02\u4eae\u7684\u76f4\u6d41\u963b\u503c\uff0c\u5374\u4ea7\u751f\u4e25\u91cd\u52a8\u6001\u8bef\u5dee\u3002<\/p>\n<h3 id=\"195-ccm\">19.5 CCM \u4e3a\u4ec0\u4e48\u9700\u8981\u659c\u5761\u8865\u507f<\/h3>\n<p>\u5cf0\u503c\u7535\u6d41\u6a21\u5f0f\u5728\u4e00\u5b9a\u6761\u4ef6\u4e0b\u51fa\u73b0\u6b21\u8c10\u6ce2\u632f\u8361\uff0c\u5e38\u89c1\u4e8e\u8f83\u5927\u5360\u7a7a\u6bd4 CCM\u3002\u8868\u73b0\u53ef\u80fd\u4e3a\u76f8\u90bb\u5468\u671f\u4e00\u9ad8\u4e00\u4f4e\uff0c\u5373\u4f7f\u4f4e\u9891\u7535\u538b\u73af\u770b\u8d77\u6765\u6ca1\u6709\u660e\u663e\u632f\u8361\u3002\u52a0\u5165\u4eba\u5de5\u659c\u5761\u53ef\u6539\u53d8\u9010\u5468\u671f\u8bef\u5dee\u4f20\u64ad\uff0c\u4f7f\u7535\u6d41\u73af\u7a33\u5b9a\u3002<\/p>\n<p>\u4ee5\u540c\u4e00\u91c7\u6837\u57df\u5b9a\u4e49\u5bfc\u901a\u4e0a\u5347\u659c\u7387 m1\u3001\u5173\u65ad\u4e0b\u964d\u659c\u7387\u5e45\u503c m2\uff0c\u7406\u60f3\u57fa\u672c\u7a33\u5b9a\u6761\u4ef6\u53ef\u5199\u4e3a\u4eba\u5de5\u659c\u7387 ma&gt;(m2\u2212m1)\/2\uff1b\u5b9e\u9645\u82af\u7247\u53ef\u80fd\u5df2\u6709\u5185\u90e8\u659c\u5761\uff0c\u6216\u91c7\u7528\u4e0d\u540c\u6ce8\u5165\u65b9\u5f0f\uff0c\u5e94\u9075\u5faa\u5176\u6a21\u578b\u3002\u4e0d\u8981\u628a\u201cD \u8d85\u8fc7\u767e\u5206\u4e4b\u4e94\u5341\u201d\u5f53\u4f5c\u6240\u6709\u63a7\u5236\u67b6\u6784\u552f\u4e00\u6761\u4ef6\uff0c\u4e5f\u4e0d\u8981\u5ffd\u7565\u6ce8\u5165\u4f1a\u6539\u53d8\u9650\u6d41\u9608\u503c\u3002<\/p>\n<h3 id=\"196\">19.6 \u63a7\u5236\u5668\u5177\u4f53\u578b\u53f7\u6700\u540e\u518d\u843d\u5730<\/h3>\n<p>\u9009\u62e9\u63a7\u5236\u5668\u65f6\u5148\u770b\u4ea4\u6d41\u5e94\u7528\u8303\u56f4\u3001\u542f\u52a8\u65b9\u5f0f\u3001VCC\u3001\u6700\u5927\u8109\u5bbd\u3001\u6700\u4f4e\u5bfc\u901a\u65f6\u95f4\u3001\u9891\u7387\u3001\u53cd\u9988\u7c7b\u578b\u3001\u4fdd\u62a4\u548c\u5c01\u88c5\uff0c\u518d\u51b3\u5b9a\u5916\u56f4\u3002\u672c\u6587\u8ba1\u7b97\u9891\u7387\u662f\u8bbe\u8ba1\u5047\u8bbe\uff0c\u4e0d\u662f\u58f0\u79f0\u67d0\u4efb\u610f PWM \u82af\u7247\u90fd\u80fd\u6309\u8fd9\u4e2a\u6a21\u5f0f\u5de5\u4f5c\u3002\u96c6\u6210\u9ad8\u538b\u5f00\u5173\u82af\u7247\u8fd8\u9700\u68c0\u67e5\u5185\u90e8\u5cf0\u503c\u3001\u70ed\u80fd\u529b\u548c\u6700\u574f\u6bcd\u7ebf\u3002<\/p>\n<h2 id=\"tl431\">\u4e8c\u5341\u3001\u8f93\u51fa\u53cd\u9988\uff1aTL431\u3001\u5149\u8026\u548c\u539f\u8fb9\u53cd\u9988<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-12-feedback.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"TL431\u4e0e\u5149\u8026\u53cd\u9988\u7535\u8def\u3001\u5206\u538b\u5173\u7cfb\u548c\u53cd\u9988\u4f5c\u7528\u65b9\u5411\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-12-feedback.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"201\">20.1 \u4e8c\u6b21\u4fa7\u91c7\u6837\u7684\u5b8c\u6574\u8def\u5f84<\/h3>\n<p>\u5e38\u89c1\u65b9\u6848\u7528 TL431 \u7c7b\u57fa\u51c6\u5668\u4ef6\u6bd4\u8f83\u8f93\u51fa\u5206\u538b\u4e0e\u5185\u90e8\u53c2\u8003\uff0c\u8c03\u8282\u5149\u8026 LED \u7535\u6d41\uff1b\u5149\u8026\u4e00\u6b21\u4fa7\u6676\u4f53\u7ba1\u6539\u53d8\u63a7\u5236\u5668\u53cd\u9988\u6216 COMP \u8282\u70b9\uff0c\u8c03\u6574\u5cf0\u503c\u6307\u4ee4\u3002\u8f93\u51fa\u4e0a\u5347\uff0c\u5e94\u4f7f\u63a7\u5236\u5668\u51cf\u5c11\u9001\u80fd\uff1b\u8f93\u51fa\u4e0b\u964d\uff0c\u5e94\u589e\u52a0\u9001\u80fd\u3002\u5177\u4f53\u4e00\u6b21\u4fa7\u8fde\u63a5\u53ef\u80fd\u4e0d\u540c\uff0c\u6240\u4ee5\u5fc5\u987b\u6cbf\u7740\u9009\u5b9a\u63a7\u5236\u5668\u7684\u6570\u636e\u624b\u518c\u786e\u8ba4\u6700\u7ec8\u4f5c\u7528\u65b9\u5411\u3002<\/p>\n<p>\u5149\u8026\u89e3\u51b3\u8de8\u9694\u79bb\u533a\u4f20\u9012\u8bef\u5dee\u4fe1\u53f7\uff0c\u4e0d\u76f4\u63a5\u4f20\u9012\u8f93\u51fa\u7535\u6d41\u3002TL431 \u4e5f\u4e0d\u662f\u666e\u901a\u56fa\u5b9a\u9f50\u7eb3\u4e8c\u6781\u7ba1\uff0c\u5b83\u6709\u53c2\u8003\u3001\u9634\u6781\u548c\u9633\u6781\uff0c\u5de5\u4f5c\u7535\u6d41\u3001\u9634\u6781\u7535\u538b\u3001\u7a33\u5b9a\u6027\u548c\u9891\u7387\u54cd\u5e94\u90fd\u8981\u6ee1\u8db3\u6761\u4ef6\u3002\u4e0d\u540c\u5c01\u88c5\u7684\u811a\u4f4d\u9700\u8981\u67e5\u8d44\u6599\uff0c\u4e0d\u80fd\u51ed\u5916\u5f62\u8bb0\u5fc6\u63a5\u7ebf\u3002<\/p>\n<h3 id=\"202\">20.2 \u4e94\u4f0f\u5206\u538b\u600e\u6837\u8ba1\u7b97<\/h3>\n<p>\u5b9a\u4e49 Rtop \u4ece\u8f93\u51fa\u6b63\u7aef\u5230 REF\uff0cRbot \u4ece REF \u5230\u8f93\u51fa\u8d1f\u7aef\uff1a<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>o<\/sub>\u2248V<sub>ref<\/sub>(1+R<sub>top<\/sub>\/R<sub>bot<\/sub>)+I<sub>ref<\/sub>R<sub>top<\/sub><\/strong><\/p>\n<p>\u4ee5\u540d\u4e49 Vref\u22482.495 V \u521d\u7b97\uff0c\u5ffd\u7565\u53c2\u8003\u8f93\u5165\u7535\u6d41\uff0c\u4e94\u4f0f\u6240\u9700 Rtop\/Rbot\u22481.004\u3002\u4e0a\u4e0b\u5404 10 k\u03a9 \u65f6\u7ea6 4.99 V\uff1b\u518d\u6839\u636e\u6240\u9009\u53c2\u8003\u7b49\u7ea7\u3001\u963b\u503c\u516c\u5dee\u548c\u5b9e\u9645\u76ee\u6807\u4fee\u6b63\u3002\u8f93\u51fa\u7cbe\u5ea6\u8fd8\u53d7\u5149\u8026\u3001\u73af\u8def\u3001\u91c7\u6837\u94dc\u7ebf\u548c\u6e29\u5ea6\u5f71\u54cd\uff0c\u4e0d\u80fd\u53ea\u9760\u6311\u4e00\u5bf9\u7b49\u503c\u7535\u963b\u4fdd\u8bc1\u6240\u6709\u6761\u4ef6\u4e0b\u7cbe\u786e\u4e94\u4f0f\u3002<\/p>\n<h3 id=\"203\">20.3 \u4e94\u4f0f\u8f93\u51fa\u7684\u53cd\u9988\u7535\u538b\u4f59\u91cf\u6709\u9650<\/h3>\n<p>\u5149\u8026 LED\u3001\u9650\u6d41\u7535\u963b\u548c TL431 \u9634\u6781\u4e32\u8054\u8def\u5f84\u90fd\u9700\u8981\u7535\u538b\u3002\u82e5 LED \u538b\u964d\u7ea6 1.2 V\u3001TL431 \u5de5\u4f5c\u9700\u8981\u7ea6 2.5 V\uff0c\u4e94\u4f0f\u5269\u4f59\u7ea6 1.3 V \u7ed9\u7535\u963b\u548c\u52a8\u6001\u3002\u8d1f\u8f7d\u77ac\u6001\u65f6\u8f93\u51fa\u4e0b\u8dcc\uff0c\u8fd9\u4e2a\u4f59\u91cf\u8fd8\u4f1a\u51cf\u5c11\uff0c\u5e94\u68c0\u67e5\u53c2\u8003\u5668\u4ef6\u662f\u5426\u4ecd\u5de5\u4f5c\u5728\u6240\u9700\u8303\u56f4\u3002<\/p>\n<p>LED \u9650\u6d41\u7535\u963b\u53ef\u6309\u6709\u6548\u4f59\u538b\u4e0e\u76ee\u6807\u7535\u6d41\u521d\u7b97\uff0c\u4f46\u76ee\u6807 LED \u7535\u6d41\u7531\u6700\u5dee CTR\u3001\u4e00\u6b21\u4fa7\u62c9\u7535\u6d41\u3001TL431 \u6700\u4f4e\u5de5\u4f5c\u7535\u6d41\u548c\u73af\u8def\u589e\u76ca\u5171\u540c\u51b3\u5b9a\u3002\u6bd4\u5982\u60f3\u7528\u534a\u6beb\u5b89\u504f\u7f6e\uff0c\u4e0d\u4ee3\u8868\u6bcf\u79cd TL431\u3001\u6bcf\u4e2a\u5149\u8026\u6279\u6b21\u90fd\u5408\u9002\uff0c\u5e94\u67e5\u5404\u81ea\u4fdd\u8bc1\u6761\u4ef6\u3002<\/p>\n<h3 id=\"204-ctr\">20.4 CTR \u4e0d\u662f\u4e00\u4e2a\u6c38\u8fdc\u7b49\u4e8e\u4e00\u7684\u5e38\u6570<\/h3>\n<p>\u5149\u8026 CTR \u4e0e LED \u7535\u6d41\u3001\u6e29\u5ea6\u3001\u8001\u5316\u548c\u5206\u6863\u6709\u5173\u3002\u6309\u5178\u578b CTR \u642d\u5efa\u7535\u8def\u53ef\u80fd\u5728\u4e00\u5757\u677f\u4e0a\u5de5\u4f5c\uff0c\u6279\u91cf\u4f4e CTR \u6216\u9ad8\u6e29\u4e0b\u5374\u5931\u53bb\u8c03\u8282\u80fd\u529b\u3002\u9ad8 CTR \u53c8\u53ef\u80fd\u6539\u53d8\u73af\u8def\u589e\u76ca\uff0c\u4f7f\u539f\u8865\u507f\u4ea7\u751f\u4e0d\u540c\u4ea4\u8d8a\u9891\u7387\u3002<\/p>\n<p>\u8bbe\u8ba1\u5e94\u540c\u65f6\u68c0\u67e5\u6700\u5927\u6240\u9700 LED \u7535\u6d41\u3001\u6700\u5c0f\u8c03\u8282\u7535\u6d41\u3001\u5149\u8026\u6676\u4f53\u7ba1\u9971\u548c\u4e0e\u9000\u51fa\u9971\u548c\u901f\u5ea6\u3002\u4e0d\u8981\u628a\u5149\u8026\u4e00\u4fa7\u63a5\u6210\u59cb\u7ec8\u6df1\u5ea6\u9971\u548c\uff0c\u7136\u540e\u671f\u5f85\u5b83\u4ecd\u6709\u7ebf\u6027\u7684\u5c0f\u4fe1\u53f7\u4f20\u9012\u80fd\u529b\u3002<\/p>\n<h3 id=\"205\">20.5 \u539f\u8fb9\u53cd\u9988\u9760\u4ec0\u4e48\u77e5\u9053\u8f93\u51fa<\/h3>\n<p>\u539f\u8fb9\u53cd\u9988\u5229\u7528\u8f85\u52a9\u7ed5\u7ec4\u5728\u6b21\u7ea7\u9001\u80fd\u671f\u95f4\u53cd\u5c04\u7684\u7535\u538b\u4f30\u7b97\u8f93\u51fa\uff0c\u67d0\u4e9b\u82af\u7247\u5728\u63a5\u8fd1\u9000\u78c1\u7ed3\u675f\u7684\u7279\u5b9a\u65f6\u523b\u91c7\u6837\uff0c\u4ee5\u51cf\u5c0f\u7535\u6d41\u76f8\u5173\u538b\u964d\u8bef\u5dee\u3002\u5b83\u51cf\u5c11\u5149\u8026\u4e0e\u6b21\u7ea7\u53c2\u8003\u5668\u4ef6\uff0c\u4f46\u7cbe\u5ea6\u4ecd\u53d7\u531d\u6bd4\u3001\u4e8c\u6781\u7ba1\u3001\u7ebf\u635f\u3001\u8026\u5408\u548c\u91c7\u6837\u566a\u58f0\u5f71\u54cd\u3002<\/p>\n<p>\u56e0\u6b64\u4e0d\u80fd\u628a\u8f85\u52a9\u7ed5\u7ec4\u6574\u6d41\u7535\u538b\u4efb\u610f\u5206\u538b\u63a5\u5230\u666e\u901a\u53cd\u9988\u82af\u7247\uff0c\u5c31\u8ba4\u4e3a\u5b8c\u6210\u539f\u8fb9\u53cd\u9988\u3002\u4e13\u7528\u63a7\u5236\u5668\u7684\u91c7\u6837\u7a97\u53e3\u3001\u6052\u538b\u6052\u6d41\u673a\u5236\u3001\u9000\u78c1\u68c0\u6d4b\u4e0e\u5f02\u5e38\u4fdd\u62a4\u9700\u8981\u914d\u5957\u78c1\u4ef6\u548c\u5e03\u5c40\u3002\u9700\u8981\u7cbe\u786e\u4e94\u4f0f\u6216\u8f83\u5f3a\u8d1f\u8f7d\u77ac\u6001\u65f6\uff0c\u5e94\u6bd4\u8f83\u4e8c\u6b21\u4fa7\u53cd\u9988\u548c\u5177\u4f53\u539f\u8fb9\u53cd\u9988\u65b9\u6848\u3002<\/p>\n<h2 id=\"_11\">\u4e8c\u5341\u4e00\u3001\u73af\u8def\u8865\u507f\uff1a\u4e3a\u4ec0\u4e48\u4f1a\u632f\u8361\uff0c\u600e\u6837\u9a8c\u8bc1<\/h2>\n<h3 id=\"211\">21.1 \u5148\u7406\u89e3\u529f\u7387\u7ea7\u4e0e\u8865\u507f\u5668<\/h3>\n<p>\u63a7\u5236\u5668\u6539\u53d8\u5cf0\u503c\u6307\u4ee4\uff0c\u78c1\u4ef6\u6539\u53d8\u9001\u80fd\uff0c\u8f93\u51fa\u7535\u5bb9\u4e0e\u8d1f\u8f7d\u628a\u7535\u6d41\u53d8\u6210\u7535\u538b\uff0c\u53cd\u9988\u628a\u7535\u538b\u53d8\u6210\u8bef\u5dee\u4fe1\u53f7\u3002\u8fd9\u4e9b\u73af\u8282\u90fd\u6709\u5e45\u503c\u4e0e\u5ef6\u65f6\u3002\u82e5\u67d0\u9891\u7387\u4e0b\u73af\u8def\u589e\u76ca\u4ecd\u5927\u4e8e\u4e00\uff0c\u53cd\u9988\u76f8\u4f4d\u5374\u63a5\u8fd1\u6b63\u53cd\u9988\u6761\u4ef6\uff0c\u5c31\u53ef\u80fd\u632f\u8361\u3002<\/p>\n<p>\u8865\u507f\u4e0d\u662f\u8ba9\u8f93\u51fa\u7eb9\u6ce2\u5c3d\u53ef\u80fd\u5e73\u6ed1\u7684\u4e07\u80fd\u7535\u5bb9\uff0c\u5b83\u662f\u5728\u7a33\u5b9a\u6027\u4e0e\u54cd\u5e94\u901f\u5ea6\u4e4b\u95f4\u5efa\u7acb\u53ef\u63a7\u5173\u7cfb\u3002\u9891\u7387\u8d8a\u5feb\u4e0d\u4e00\u5b9a\u8d8a\u597d\uff1b\u5149\u8026\u3001TL431\u3001\u91c7\u6837\u548c\u5f00\u5173\u52a8\u6001\u90fd\u4f1a\u9650\u5236\u53ef\u7528\u5e26\u5bbd\u3002\u76f8\u4f4d\u88d5\u91cf\u548c\u589e\u76ca\u88d5\u91cf\u6700\u7ec8\u8981\u5728\u5b9e\u9645\u7535\u8def\u6d4b\u91cf\u3002<\/p>\n<h3 id=\"212-ccm\">21.2 CCM \u7684\u53f3\u534a\u5e73\u9762\u96f6\u70b9<\/h3>\n<p>CCM \u4e2d\u589e\u5927\u5bfc\u901a\u65f6\u95f4\u4f1a\u77ed\u6682\u7f29\u77ed\u6b21\u7ea7\u9001\u80fd\u65f6\u95f4\uff0c\u8f93\u51fa\u5148\u53ef\u80fd\u4e0b\u964d\uff0c\u518d\u968f\u7740\u50a8\u80fd\u589e\u5927\u800c\u4e0a\u5347\u3002\u8fd9\u79cd\u201c\u5148\u671d\u53cd\u65b9\u5411\u79fb\u52a8\u201d\u7684\u54cd\u5e94\u5f15\u5165\u53f3\u534a\u5e73\u9762\u96f6\u70b9\uff1a\u5e45\u9891\u54cd\u5e94\u50cf\u96f6\u70b9\uff0c\u76f8\u4f4d\u5374\u589e\u52a0\u6ede\u540e\u3002<\/p>\n<p>\u672c\u6587\u5b9a\u4e49 n=Np\/Ns\u3001Lm \u4e3a\u521d\u7ea7\u7535\u611f\uff0c\u7406\u60f3\u8fde\u7eed\u6a21\u5f0f\u8fd1\u4f3c\u4e3a\uff1a<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>f<sub>RHP<\/sub>\u2248R<sub>load<\/sub>n\u00b2(1\u2212D)\u00b2\/(2\u03c0L<sub>m<\/sub>D)<\/strong><\/p>\n<p>\u8fd9\u91cc n\u00b2 \u5728\u5206\u5b50\uff0c\u4e0d\u80fd\u56e0\u4e3a\u5176\u4ed6\u8d44\u6599\u91c7\u7528 Ns\/Np \u5c31\u76f4\u63a5\u6284\u5230\u5206\u6bcd\u3002\u7b49\u6548\u6b21\u7ea7\u7535\u611f\u4e3a Lm\/n\u00b2\uff0c\u4ee3\u5165\u540c\u4e00\u516c\u5f0f\u53ef\u4ee5\u4ea4\u53c9\u68c0\u67e5\u3002\u521d\u59cb\u4ea4\u8d8a\u9891\u7387\u901a\u5e38\u663e\u8457\u4f4e\u4e8e\u6700\u4f4e fRHP\uff0c\u5e76\u8003\u8651\u5f00\u5173\u9891\u7387\u548c\u53cd\u9988\u5668\u4ef6\u6781\u70b9\uff1b\u5177\u4f53\u6bd4\u4f8b\u7531\u6a21\u578b\u4e0e\u5b9e\u6d4b\u51b3\u5b9a\u3002<\/p>\n<h3 id=\"213-dcm-rhp\">21.3 DCM \u6ca1\u6709\u8fd9\u4e00\u7406\u60f3\u4f4e\u9891 RHP \u96f6\u70b9\uff0c\u4e5f\u4e0d\u4ee3\u8868\u968f\u610f\u8865\u507f<\/h3>\n<p>DCM \u7406\u60f3\u4f4e\u9891\u6a21\u578b\u76f8\u5bf9\u7b80\u5355\uff0c\u4f46\u8f93\u51fa\u6781\u70b9\u3001ESR \u96f6\u70b9\u3001\u5149\u8026\u5ef6\u8fdf\u3001\u6a21\u5f0f\u5207\u6362\u548c\u91c7\u6837\u4ecd\u4f1a\u9650\u5236\u7a33\u5b9a\u6027\u3002\u8f7b\u8f7d\u589e\u76ca\u53d8\u5316\u3001\u8df3\u8109\u51b2\u548c\u7a81\u53d1\u6a21\u5f0f\u8fd8\u53ef\u80fd\u4f7f\u7ebf\u6027\u6a21\u578b\u5931\u6548\u3002\u82e5\u5b9e\u9645\u5728\u8fc7\u8f7d\u8fdb\u5165 CCM\uff0c\u8981\u786e\u8ba4\u8865\u507f\u4e0e\u4fdd\u62a4\u4ecd\u8986\u76d6\u8be5\u533a\u95f4\u3002<\/p>\n<p>\u8f93\u51fa\u7535\u5bb9\u6539\u53d8\u3001ESR \u5927\u5e45\u964d\u4f4e\u3001\u5149\u8026\u5206\u6863\u6539\u53d8\u6216\u8005\u6362\u4e86\u53cd\u9988\u53c2\u8003\u5668\u4ef6\uff0c\u90fd\u4f1a\u6539\u53d8\u539f\u6765\u7684\u8865\u507f\u6761\u4ef6\u3002\u7167\u6284\u4e00\u5757\u4e0d\u540c\u529f\u7387\u3001\u4e0d\u540c\u7535\u5bb9\u3001\u4e0d\u540c\u53d8\u538b\u5668\u7684 RC \u6570\u503c\uff0c\u53ea\u80fd\u5f53\u8d77\u70b9\uff0c\u4e0d\u80fd\u5f53\u5df2\u5b8c\u6210\u8bbe\u8ba1\u3002<\/p>\n<h3 id=\"214\">21.4 \u5e38\u89c1\u8865\u507f\u96f6\u6781\u70b9\u7684\u7269\u7406\u610f\u4e49<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>f<sub>z<\/sub>\u22481\/(2\u03c0R<sub>comp<\/sub>C<sub>comp<\/sub>)\uff1b\u3000f<sub>ESR<\/sub>\u22481\/(2\u03c0ESR\u00b7C<sub>out<\/sub>)<\/strong><\/p>\n<p>\u7b2c\u4e00\u5f0f\u4ec5\u5bf9\u5e94\u660e\u786e\u7684\u4e32\u8054 RC \u8865\u507f\u652f\u8def\uff0c\u6574\u4f53\u6781\u70b9\u53d6\u51b3\u4e8e\u5176\u4ed6\u7535\u963b\u3001\u7535\u5bb9\u53ca\u5668\u4ef6\u963b\u6297\u3002\u8865\u507f\u5668\u5e38\u7528\u79ef\u5206\u63d0\u9ad8\u4f4e\u9891\u589e\u76ca\uff0c\u7528\u96f6\u70b9\u62b5\u6d88\u90e8\u5206\u76f8\u4f4d\u6ede\u540e\uff0c\u7528\u9ad8\u9891\u6781\u70b9\u6291\u5236\u566a\u58f0\u3002\u4e0d\u8981\u628a\u5355\u4e2a\u652f\u8def\u8f6c\u6298\u9891\u7387\u5f53\u4f5c\u6574\u4e2a\u73af\u8def\u7684\u4ea4\u8d8a\u9891\u7387\u3002<\/p>\n<h3 id=\"215\">21.5 \u6ca1\u6709\u7f51\u7edc\u5206\u6790\u4eea\u65f6\u5148\u505a\u4ec0\u4e48<\/h3>\n<p>\u81f3\u5c11\u6d4b\u8bd5\u8f7b\u8f7d\u3001\u534a\u8f7d\u3001\u6ee1\u8f7d\u4e0b\u7684\u8d1f\u8f7d\u9636\u8dc3\uff0c\u5e76\u5728\u6700\u4f4e\u3001\u6807\u79f0\u548c\u6700\u9ad8\u8f93\u5165\u91cd\u590d\u3002\u89c2\u5bdf\u8fc7\u51b2\u3001\u6b20\u51b2\u3001\u632f\u94c3\u3001\u6062\u590d\u65f6\u95f4\u548c\u662f\u5426\u51fa\u73b0\u5468\u671f\u6027\u547c\u5438\u3002\u8fd8\u5e94\u6d4b\u8bd5\u542f\u505c\u3001\u8fc7\u8f7d\u6062\u590d\u548c\u7535\u5bb9\u6e29\u5ea6\u53d8\u5316\u3002<\/p>\n<p>\u826f\u597d\u7684\u9636\u8dc3\u54cd\u5e94\u4e0d\u7b49\u4e8e\u5df2\u7ecf\u91cf\u5316\u76f8\u4f4d\u88d5\u91cf\uff0c\u4f46\u80fd\u53d1\u73b0\u5f88\u591a\u660e\u663e\u95ee\u9898\u3002\u82e5\u9700\u8981\u6279\u91cf\u53ef\u9760\u6027\u4e0e\u4e25\u683c\u52a8\u6001\u6307\u6807\uff0c\u5e94\u8fdb\u884c\u73af\u8def\u6ce8\u5165\u6d4b\u91cf\uff0c\u9009\u62e9\u4e0d\u7834\u574f\u76f4\u6d41\u5de5\u4f5c\u70b9\u7684\u6ce8\u5165\u4f4d\u7f6e\uff0c\u4f7f\u7528\u9694\u79bb\u6ce8\u5165\u4e0e\u9002\u5f53\u4eea\u5668\u3002\u4e0d\u80fd\u968f\u4fbf\u65ad\u5f00\u5149\u8026\u7535\u8def\u540e\u628a\u6d4b\u5f97\u7ed3\u679c\u5f53\u539f\u73af\u8def\u3002<\/p>\n<h2 id=\"_12\">\u4e8c\u5341\u4e8c\u3001\u542f\u52a8\u4e0e\u8f85\u52a9\u4f9b\u7535\uff1a\u4e3a\u4ec0\u4e48\u4f1a\u542f\u52a8\u4e00\u4e0b\u53c8\u505c<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-13-startup.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u9ad8\u538b\u542f\u52a8\u3001VCC\u7535\u5bb9\u3001\u8f85\u52a9\u7ed5\u7ec4\u548cUVLO\u4ea4\u63a5\u65f6\u5e8f\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-13-startup.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"221\">22.1 \u63a7\u5236\u5668\u4e0a\u7535\u524d\u4ece\u54ea\u91cc\u83b7\u5f97\u80fd\u91cf<\/h3>\n<p>\u542f\u52a8\u65f6\u8f85\u52a9\u7ed5\u7ec4\u8fd8\u6ca1\u6709\u5de5\u4f5c\uff0c\u63a7\u5236\u5668\u5fc5\u987b\u901a\u8fc7\u9ad8\u538b\u542f\u52a8\u7535\u8def\u6216\u542f\u52a8\u7535\u963b\u7ed9 VCC \u7535\u5bb9\u5145\u7535\u3002VCC \u5230\u8fbe\u542f\u52a8\u9608\u503c\u540e\u5f00\u59cb\u5f00\u5173\uff0c\u8f93\u51fa\u4e0e\u8f85\u52a9\u7ed5\u7ec4\u9010\u6e10\u5efa\u7acb\uff1b\u8f85\u52a9\u6574\u6d41\u63a5\u7ba1\u4f9b\u7535\uff0c\u4f7f VCC \u4e0d\u4f1a\u8dcc\u5230\u5173\u65ad\u9608\u503c\u3002<\/p>\n<p>\u9ad8\u538b\u542f\u52a8\u82af\u7247\u53ef\u80fd\u5185\u90e8\u5b8c\u6210\u5145\u7535\u5e76\u964d\u4f4e\u5f85\u673a\u8017\u7535\uff1b\u4f20\u7edf\u7535\u963b\u542f\u52a8\u5219\u6301\u7eed\u4ece\u6bcd\u7ebf\u53d6\u7535\u3002\u4e24\u79cd\u65b9\u5f0f\u7684\u65f6\u95f4\u3001\u7535\u6d41\u548c\u529f\u8017\u8ba1\u7b97\u4e0d\u540c\u3002\u4e0d\u8981\u628a\u63a7\u5236\u5668\u8017\u7535\u7b80\u5355\u5ffd\u7565\uff0c\u5426\u5219\u53ef\u80fd\u51fa\u73b0\u542f\u52a8\u7535\u963b\u80fd\u5145\u7535\uff0c\u5374\u65e0\u6cd5\u652f\u6491\u5f00\u5173\u5efa\u7acb\u8f85\u52a9\u4f9b\u7535\u3002<\/p>\n<h3 id=\"222\">22.2 \u542f\u52a8\u7535\u963b\u4e0e\u65f6\u95f4<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>start<\/sub>\u2248(V<sub>bus<\/sub>\u2212V<sub>CC<\/sub>)\/R<sub>start<\/sub>\uff1b\u3000t<sub>start<\/sub>\u2248C<sub>VCC<\/sub>\u0394V\/(I<sub>start<\/sub>\u2212I<sub>IC,off<\/sub>)<\/strong><\/p>\n<p>\u8fd9\u662f\u542f\u52a8\u7535\u6d41\u8fd1\u4f3c\u6052\u5b9a\u65f6\u7684\u4f30\u7b97\u3002\u5b9e\u9645\u4ece\u96f6\u5145\u7535\u7684 RC \u6307\u6570\u548c\u82af\u7247\u9608\u503c\u4f1a\u5f71\u54cd\u65f6\u95f4\u3002\u82e5\u9ad8\u538b\u5dee\u7ea6\u4e09\u767e\u4f0f\u3001\u603b\u542f\u52a8\u7535\u963b\u4e00\u5146\u6b27\uff0c\u7535\u6d41\u91cf\u7ea7\u4e3a 0.3 mA\uff1b\u7535\u5bb9\u8f83\u5927\u65f6\u542f\u52a8\u53ef\u80fd\u660e\u663e\u53d8\u6162\uff0c\u4e14\u5fc5\u987b\u786e\u8ba4\u5173\u65ad\u6001\u8017\u7535\u5c0f\u4e8e\u53ef\u7528\u5145\u7535\u7535\u6d41\u3002<\/p>\n<p>\u7535\u963b\u8017\u7535\u7ea6 V\u00b2\/R\uff0c310 V\u3001\u4e00\u5146\u6b27\u7ea6 96 mW\uff0c\u8fd8\u8981\u68c0\u67e5\u5355\u4f53\u5de5\u4f5c\u7535\u538b\u548c\u6700\u9ad8\u8f93\u5165\u3002\u91c7\u7528\u591a\u4e2a\u4e32\u8054\u7535\u963b\u4e0d\u53ea\u662f\u5206\u6563\u529f\u7387\uff0c\u4e5f\u6709\u5229\u4e8e\u6ee1\u8db3\u7535\u538b\u989d\u5b9a\u503c\uff0c\u4f46\u5e03\u5c40\u4e0e\u5f02\u5e38\u5f00\u8def\u77ed\u8def\u4ecd\u9700\u8003\u8651\u3002<\/p>\n<h3 id=\"223-vcc\">22.3 VCC \u7535\u5bb9\u6491\u591a\u4e45<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>t<sub>hold,VCC<\/sub>\u2248C<sub>VCC<\/sub>(V<sub>on<\/sub>\u2212V<sub>off<\/sub>)\/I<sub>run,net<\/sub><\/strong><\/p>\n<p>\u4f8b\u5982\u5047\u8bbe\u9608\u503c\u5dee\u4e3a 5 V\u3001\u51c0\u8fd0\u884c\u7535\u6d41 5 mA\u3001CVCC=10 \u03bcF\uff0c\u5219\u53ef\u7528\u65f6\u95f4\u7ea6 10 ms\u3002\u8fd9\u53ea\u662f\u901a\u7528\u8bf4\u660e\uff0c\u4e0d\u4ee3\u8868\u7279\u5b9a\u82af\u7247\u9608\u503c\u3002\u771f\u5b9e\u8fd0\u884c\u7535\u6d41\u8fd8\u5305\u62ec\u6805\u6781\u5145\u653e\u7535\u3001\u9a71\u52a8\u635f\u8017\u4e0e\u542f\u52a8\u9650\u6d41\u72b6\u6001\uff0c\u8981\u4ece\u9009\u5b9a\u63a7\u5236\u5668\u8d44\u6599\u548c\u6d4b\u91cf\u5f97\u5230\u3002<\/p>\n<p>\u82e5\u8f93\u51fa\u7535\u5bb9\u5f88\u5927\u3001\u8d1f\u8f7d\u542f\u52a8\u7535\u6d41\u5f88\u9ad8\uff0c\u8f85\u52a9\u7535\u538b\u5efa\u7acb\u9700\u8981\u66f4\u4e45\uff0cVCC \u53ef\u80fd\u5148\u89e6\u53d1 UVLO\u3002\u8868\u73b0\u4e3a\u5468\u671f\u6027\u542f\u52a8\u8109\u51b2\u548c\u8f93\u51fa\u8d77\u4f0f\uff0c\u5e94\u68c0\u67e5 VCC \u6ce2\u5f62\u800c\u4e0d\u662f\u5148\u6000\u7591 TL431 \u8865\u507f\u3002<\/p>\n<h3 id=\"224\">22.4 \u4e3b\u7b97\u4f8b\u8f85\u52a9\u7ed5\u7ec4\u8ba1\u7b97<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>V<sub>aux<\/sub>\u2248(N<sub>a<\/sub>\/N<sub>s<\/sub>)(V<sub>o<\/sub>+V<sub>F<\/sub>)\u2212V<sub>F,aux<\/sub><\/strong><\/p>\n<p>\u53d6 Na=20\u3001Ns=7\u3001Vo\u2032=5.5 V\u3001\u8f85\u52a9\u4e8c\u6781\u7ba1\u538b\u964d 0.5 V\uff0c\u5f97\u5230\u7ea6 15.21 V\u3002\u5b9e\u9645\u8f7b\u8f7d\u3001\u6f0f\u611f\u632f\u94c3\u3001\u8f85\u52a9\u8d1f\u8f7d\u548c\u6574\u6d41\u91c7\u6837\u4f1a\u4f7f\u7535\u538b\u504f\u79bb\uff0c\u5e94\u9a8c\u8bc1 VCC \u6700\u4f4e\u4f9b\u7535\u4e0e\u6700\u9ad8\u7edd\u5bf9\u503c\u3002<\/p>\n<p>\u8f85\u52a9\u7ed5\u7ec4\u867d\u7136\u7ed5\u5728\u53d8\u538b\u5668\u4e0a\uff0c\u5374\u901a\u5e38\u5c5e\u4e8e\u4e00\u6b21\u4fa7\u70ed\u5730\u3002\u5b83\u4e0d\u80fd\u5f53\u4f5c\u5b89\u5168\u9694\u79bb\u4e94\u4f0f\u8f93\u51fa\u9001\u7ed9\u5916\u90e8\u63a5\u53e3\u3002\u56fe\u7eb8\u548c\u7ed5\u7ec4\u8868\u5fc5\u987b\u6807\u660e\u5176\u7535\u4f4d\u533a\u4e0e\u7edd\u7f18\u5173\u7cfb\uff0c\u9632\u6b62\u628a\u201c\u7b2c\u4e09\u7ed5\u7ec4\u201d\u9519\u8bef\u5730\u89c6\u4e3a\u90fd\u5bf9\u7528\u6237\u5b89\u5168\u3002<\/p>\n<h3 id=\"225\">22.5 \u8f7b\u8f7d\u8f85\u52a9\u8fc7\u538b\u4e0e\u77ed\u8def\u6b20\u538b<\/h3>\n<p>\u8f7b\u8f7d\u7a81\u53d1\u6a21\u5f0f\u65f6\u8f85\u52a9\u6ce2\u5cf0\u53ef\u80fd\u9ad8\uff0cVCC \u6574\u6d41\u7535\u5bb9\u4f1a\u5145\u5230\u8f83\u9ad8\u503c\uff1b\u8f93\u51fa\u77ed\u8def\u65f6\u8f85\u52a9\u53cd\u5c04\u7535\u538b\u4f4e\uff0c\u63a7\u5236\u5668\u53ef\u80fd\u4f9d\u9760 UVLO \u6253\u55dd\u3002\u8fd9\u79cd\u6253\u55dd\u662f\u5426\u53d7\u63a7\u3001\u91cd\u590d\u9891\u7387\u5982\u4f55\u3001\u6700\u5927\u5e94\u529b\u591a\u5c11\uff0c\u5fc5\u987b\u6d4b\u8bd5\u3002<\/p>\n<p>\u5fc5\u8981\u65f6\u7528\u9002\u5f53\u4e32\u8054\u7535\u963b\u3001\u7a33\u538b\u3001\u72ec\u7acb\u4f9b\u7535\u6216\u63a7\u5236\u5668\u4fdd\u62a4\u6539\u5584\uff0c\u4f46\u6bcf\u4e2a\u65b9\u6848\u90fd\u4f1a\u589e\u52a0\u635f\u8017\u4e0e\u52a8\u6001\u3002\u4e0d\u80fd\u4efb\u610f\u52a0\u9f50\u7eb3\u7ba1\u540e\u5ffd\u7565\u5176\u8fde\u7eed\u8017\u7535\u548c\u6e29\u5347\uff0c\u4e5f\u4e0d\u80fd\u628a\u6b20\u538b\u5faa\u73af\u5f53\u6210\u5929\u7136\u5b8c\u5584\u7684\u77ed\u8def\u4fdd\u62a4\u3002<\/p>\n<h2 id=\"_13\">\u4e8c\u5341\u4e09\u3001\u4fdd\u62a4\u8bbe\u8ba1\uff1a\u6b63\u5e38\u8ba1\u7b97\u4e4b\u5916\u8fd8\u8981\u8003\u8651\u5f02\u5e38\u80fd\u91cf<\/h2>\n<h3 id=\"231\">23.1 \u9010\u5468\u671f\u9650\u6d41\u4e0d\u7b49\u4e8e\u8f93\u51fa\u6052\u6d41<\/h3>\n<p>\u9010\u5468\u671f\u9650\u6d41\u9650\u5236\u5355\u4e2a\u5f00\u5173\u8109\u51b2\u7684\u5cf0\u503c\uff0c\u4f46\u8f93\u51fa\u5e73\u5747\u7535\u6d41\u8fd8\u4f9d\u8d56\u9891\u7387\u3001\u9000\u78c1\u65f6\u95f4\u548c\u6a21\u5f0f\u3002\u5728\u8f93\u51fa\u7535\u538b\u964d\u4f4e\u65f6\uff0c\u5373\u4f7f\u5cf0\u503c\u4e0d\u53d8\uff0c\u9000\u78c1\u4f1a\u5ef6\u957f\uff1b\u82e5\u9891\u7387\u4e0d\u964d\u4f4e\uff0c\u53ef\u80fd\u79ef\u7d2f\u66f4\u9ad8\u8c37\u503c\u3002\u56e0\u6b64\u5b83\u662f\u91cd\u8981\u7684\u5668\u4ef6\u4fdd\u62a4\u57fa\u7840\uff0c\u5374\u4e0d\u81ea\u52a8\u4ea7\u751f\u51c6\u786e\u6052\u6d41\u7279\u6027\u3002<\/p>\n<p>\u6052\u6d41\u5145\u7535\u9700\u8981\u4e13\u95e8\u7684\u8f93\u51fa\u7535\u6d41\u68c0\u6d4b\u6216\u53d7\u63a7\u539f\u8fb9\u7b97\u6cd5\u3002\u6052\u538b\u53cd\u6fc0\u4e0d\u80fd\u56e0\u4e3a\u6709 CS \u7535\u963b\u5c31\u62ff\u53bb\u5ba3\u79f0\u662f\u7cbe\u786e\u6052\u6d41\u7535\u6e90\u3002\u8fc7\u8f7d\u70b9\u3001\u77ed\u8def\u70b9\u548c\u6062\u590d\u65b9\u5f0f\u8981\u5728\u89c4\u683c\u4e2d\u5355\u72ec\u5b9a\u4e49\u3002<\/p>\n<h3 id=\"232\">23.2 \u78c1\u82af\u6700\u5927\u7535\u6d41\u4e0e\u516c\u5dee\u68c0\u67e5<\/h3>\n<p>\u6b63\u5e38\u4e3b\u7b97\u4f8b \u0394Blocal\u22480.174 T\u3002\u82e5\u6700\u5927\u5b9e\u9645\u7535\u6d41\u8fbe\u5230 0.60 A\u3001Lm \u4e0a\u504f\u5230 1.10 mH\uff0c\u4f7f\u7528 Np=100\u3001Amin=27 mm\u00b2\uff0c\u7ebf\u6027\u4f30\u7b97 B \u589e\u91cf\u7ea6 0.244 T\u3002\u8fd9\u660e\u663e\u9ad8\u4e8e\u6b63\u5e38\u70b9\uff0c\u9700\u8981\u6838\u5bf9\u6700\u9ad8\u6e29\u6750\u6599\u3001\u5269\u78c1\u548c\u5f02\u5e38\u4f0f\u79d2\u3002<\/p>\n<p>\u8be5\u516c\u5f0f\u4e0d\u80fd\u5728\u5df2\u7ecf\u9971\u548c\u540e\u7ee7\u7eed\u7cbe\u786e\u63cf\u8ff0 L \u4e0e B\u3002\u8bbe\u8ba1\u5e94\u5728\u8fdb\u5165\u663e\u8457\u975e\u7ebf\u6027\u524d\u4fdd\u6709\u4f59\u91cf\uff0c\u5e76\u67e5\u770b\u7535\u6d41\u659c\u7387\u662f\u5426\u5728\u8109\u51b2\u540e\u6bb5\u53d8\u9661\u3002\u9ad8\u9891\u5c0f\u4fe1\u53f7 LCR \u6d4b\u5f97\u7535\u611f\u6b63\u5e38\uff0c\u4e0d\u8db3\u4ee5\u8bc1\u660e\u5927\u7535\u6d41\u4e0b\u4e0d\u4f1a\u9971\u548c\u3002<\/p>\n<h3 id=\"233\">23.3 \u8f93\u51fa\u8fc7\u538b\u4e0e\u53cd\u9988\u5f00\u8def<\/h3>\n<p>\u5149\u8026 LED\u3001\u5206\u538b\u7535\u963b\u6216\u53cd\u9988\u8fde\u63a5\u5f00\u8def\u53ef\u80fd\u4f7f\u63a7\u5236\u5668\u8bef\u8ba4\u4e3a\u8f93\u51fa\u8fc7\u4f4e\uff0c\u4ece\u800c\u589e\u52a0\u9001\u80fd\u3002\u5e94\u91c7\u7528\u4e0e\u63a7\u5236\u5668\u5339\u914d\u7684 OVP \u68c0\u6d4b\u4e0e\u5173\u65ad\u7b56\u7565\uff0c\u5e76\u9a8c\u8bc1\u53cd\u9988\u5931\u6548\u6761\u4ef6\u3002\u8f85\u52a9\u7ed5\u7ec4\u63a8\u7b97\u8fc7\u538b\u65f6\u4ecd\u5b58\u5728\u8026\u5408\u8bef\u5dee\uff0c\u9608\u503c\u9700\u7559\u51fa\u6b63\u5e38\u5de5\u4f5c\u88d5\u91cf\u3002<\/p>\n<p>\u8f93\u51fa\u7535\u5bb9\u8010\u538b\u3001\u6574\u6d41\u5668\u53cd\u538b\u548c\u8d1f\u8f7d\u8010\u53d7\u9700\u8981\u8986\u76d6\u4fdd\u62a4\u52a8\u4f5c\u524d\u7684\u5cf0\u503c\u3002\u72ec\u7acb\u8fc7\u538b\u4fdd\u62a4\u4e0e\u6b63\u5e38\u7a33\u538b\u73af\u4f5c\u7528\u4e0d\u540c\uff0c\u4e0d\u80fd\u56e0\u4e3a\u8f93\u51fa\u5e73\u65f6\u662f\u4e94\u4f0f\u5c31\u5b8c\u5168\u5ffd\u7565\u5f02\u5e38\u7535\u538b\u3002<\/p>\n<h3 id=\"234\">23.4 \u8f93\u5165\u6b20\u538b\u3001\u6389\u7535\u548c\u6062\u590d<\/h3>\n<p>\u6bcd\u7ebf\u964d\u4f4e\u65f6\u5bfc\u901a\u65f6\u95f4\u589e\u52a0\uff0c\u53ef\u80fd\u89e6\u53ca\u6700\u5927\u8109\u5bbd\u3001\u9650\u6d41\u6216\u4e34\u754c\u6a21\u5f0f\u3002\u8f93\u5165\u6b20\u538b\u9501\u5b9a\u53ef\u907f\u514d\u5728\u660e\u663e\u5931\u53bb\u8c03\u8282\u80fd\u529b\u7684\u6761\u4ef6\u4e0b\u6301\u7eed\u5de5\u4f5c\uff0c\u4f46\u542f\u52a8\u4e0e\u5173\u65ad\u9608\u503c\u5e94\u6709\u6ede\u56de\uff0c\u907f\u514d\u8fb9\u754c\u53cd\u590d\u542f\u505c\u3002<\/p>\n<p>\u6389\u7535\u4fdd\u6301\u65f6\u95f4\u4e0e\u8f93\u51fa\u7535\u5bb9\u3001\u50a8\u80fd\u7535\u5bb9\u548c\u63a7\u5236\u5668 VCC \u90fd\u6709\u5173\u3002\u4ec5\u589e\u52a0\u8f93\u5165\u7535\u5bb9\u4f46 VCC \u5148\u6389\u5230 UVLO\uff0c\u4ecd\u53ef\u80fd\u63d0\u524d\u505c\u6b62\uff1b\u4ec5\u589e\u52a0 VCC \u7535\u5bb9\u4f46\u6bcd\u7ebf\u5df2\u4e0d\u8db3\uff0c\u4e5f\u4e0d\u80fd\u4fdd\u6301\u8f93\u51fa\u3002<\/p>\n<h3 id=\"235\">23.5 \u8fc7\u70ed\u4e0e\u5668\u4ef6\u6545\u969c<\/h3>\n<p>\u70ed\u70b9\u53ef\u80fd\u5728\u78c1\u82af\u3001\u6c14\u9699\u9644\u8fd1\u5bfc\u7ebf\u3001\u4e8c\u6781\u7ba1\u3001\u94b3\u4f4d\u7535\u963b\u3001\u6865\u5806\u6216\u63a7\u5236\u5668\u5185\u90e8\uff0c\u4e0d\u80fd\u53ea\u6d4b MOSFET \u4e00\u4e2a\u70b9\u3002\u70ed\u4fdd\u62a4\u5e94\u4e0e\u5916\u58f3\u3001\u6700\u9ad8\u73af\u5883\u548c\u901a\u98ce\u6761\u4ef6\u7ed3\u5408\uff1b\u4ec5\u5728\u5f00\u653e\u684c\u9762\u4e0a\u8fd0\u884c\u7a33\u5b9a\uff0c\u4e0d\u4ee3\u8868\u5c01\u95ed\u4ea7\u54c1\u5185\u5408\u683c\u3002<\/p>\n<p>\u5bf9\u529f\u7387\u7ba1\u77ed\u8def\u3001\u6574\u6d41\u5668\u77ed\u8def\u3001\u78c1\u4ef6\u77ed\u8def\u531d\u3001\u542f\u52a8\u7535\u963b\u6545\u969c\u7b49\uff0c\u5e94\u8003\u8651\u8f93\u5165\u4fdd\u62a4\u4e0e\u5668\u4ef6\u5931\u6548\u540e\u679c\u3002\u8fd9\u91cc\u7684\u76ee\u7684\u4e0d\u662f\u8981\u6c42\u521d\u5b66\u8005\u968f\u610f\u7834\u574f\u5e02\u7535\u6837\u673a\uff0c\u800c\u662f\u8ba9\u8bbe\u8ba1\u89c4\u683c\u548c\u4e13\u4e1a\u9a8c\u8bc1\u660e\u786e\u8986\u76d6\u5931\u6548\u6a21\u5f0f\u3002<\/p>\n<h2 id=\"ccm_1\">\u4e8c\u5341\u56db\u3001CCM \u5bf9\u7167\u7b97\u4f8b\uff1a\u540c\u6837\u662f\u4e94\u4f0f\u8f93\u51fa\uff0c\u8ba1\u7b97\u5982\u4f55\u6539\u53d8<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-14-ccm-example.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"CCM\u5bf9\u7167\u7b97\u4f8b\u7684\u8c37\u503c\u3001\u5cf0\u503c\u3001\u78c1\u5bc6\u504f\u7f6e\u53ca\u521d\u6b21\u7ea7\u8109\u51b2\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-14-ccm-example.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"241\">24.1 \u4e3a\u4e86\u770b\u6e05\u6a21\u5f0f\u5dee\u522b\uff0c\u91c7\u7528\u72ec\u7acb\u7406\u60f3\u53c2\u6570<\/h3>\n<p>\u53d6\u76f4\u6d41\u6bcd\u7ebf 230 V\u3001\u8f93\u51fa 5 V\/3 A\u3001n=15\u3001Lm=3 mH\u3001fs=100 kHz\u3002\u672c\u8282\u6682\u5ffd\u7565\u4e8c\u6781\u7ba1\u548c\u94dc\u7ebf\u538b\u964d\uff0c\u7528\u7406\u60f3\u4e94\u4f0f\u6a21\u578b\u63a8\u5bfc\uff1b\u5b83\u4e0d\u662f\u4e3b\u7b97\u4f8b\u76f4\u63a5\u52a0\u8d1f\u8f7d\u540e\u7684\u627f\u8bfa\uff0c\u4e5f\u4e0d\u662f\u5b8c\u6574\u7684\u5341\u4e94\u74e6\u5e02\u7535\u751f\u4ea7\u65b9\u6848\u3002<\/p>\n<p>VR=15\u00d75=75 V\uff0cD=75\/(230+75)\u22480.24590\u3002\u5bfc\u901a\u533a\u95f4\u5e73\u5747\u521d\u7ea7\u53c2\u8003\u7535\u6d41\u4e3a 3\/[15\u00d7(1\u2212D)]\u22480.26522 A\uff1b\u659c\u5761\u53d8\u5316\u91cf\u4e3a 230D\/(3 mH\u00d7100 kHz)\u22480.18852 A\u3002<\/p>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>pk<\/sub>\u22480.35948 A\uff1b\u3000I<sub>val<\/sub>\u22480.17096 A\uff1b\u3000I<sub>p,rms<\/sub>\u22480.13426 A<\/strong><\/p>\n<p>\u8c37\u503c\u5927\u4e8e\u96f6\uff0c\u6240\u4ee5\u8fd9\u4e00\u5de5\u4f5c\u70b9\u5c5e\u4e8e CCM\u3002\u6b21\u7ea7\u7535\u6d41\u4ece\u7ea6 5.392 A \u964d\u5230\u7ea6 2.564 A\uff0c\u4e0b\u4e00\u5468\u671f\u4e3b\u5f00\u5173\u5f00\u901a\u65f6\u7ed3\u675f\u9001\u80fd\uff1b\u6b21\u7ea7 RMS\u22483.527 A\u3002\u6ce8\u610f MOSFET \u5b9e\u9645\u7535\u6d41\u4ecd\u5728\u5173\u65ad\u533a\u95f4\u4e3a\u96f6\uff0c\u4e0d\u80fd\u628a\u53c2\u8003\u52b1\u78c1\u6ce2\u5f62\u8bef\u753b\u6210\u4e3b\u5f00\u5173\u5168\u5929\u8fde\u7eed\u5bfc\u7535\u3002<\/p>\n<h3 id=\"242\">24.2 \u7528\u80fd\u91cf\u5dee\u68c0\u67e5\u5341\u4e94\u74e6<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>\u00bd\u00d73 mH\u00d7(0.35948\u00b2\u22120.17096\u00b2)\u00d7100 kHz\u224815 W<\/strong><\/p>\n<p>\u5cf0\u503c\u603b\u50a8\u80fd\u7ea6 194 \u03bcJ\uff0c\u4f46\u6bcf\u5468\u671f\u4f20\u8f93\u7ea6 150 \u03bcJ\u3002\u5982\u679c\u9519\u8bef\u4f7f\u7528 \u00bdLmIpk\u00b2fs\uff0c\u5c31\u4f1a\u628a\u4fdd\u7559\u5230\u4e0b\u4e00\u5468\u671f\u7684\u80fd\u91cf\u4e5f\u7b97\u6210\u5df2\u8f93\u51fa\uff0c\u5f97\u5230\u504f\u5927\u7684\u529f\u7387\u3002\u5cf0\u503c\u50a8\u80fd\u4ecd\u5fc5\u987b\u7531\u78c1\u4ef6\u627f\u53d7\uff0c\u4e0d\u4f1a\u56e0\u4e3a\u6ca1\u5168\u90e8\u8f93\u51fa\u800c\u6d88\u5931\u3002<\/p>\n<h3 id=\"243\">24.3 \u76f4\u6d41\u78c1\u5bc6\u504f\u7f6e\u4e0d\u80fd\u6f0f\u6389<\/h3>\n<p>\u53e6\u53d6 Np=180\u3001Ns=12\u3001Ae=40 mm\u00b2\u3001Amin=36 mm\u00b2\uff0c\u4fdd\u6301 n=15\u3002\u7b49\u6548 Bmax\u22480.150 T\uff0cBmin\u22480.071 T\uff0c\u0394B\u22480.0786 T\uff1b\u6309 Amin \u7684\u5c40\u90e8\u68c0\u67e5\u5206\u522b\u7ea6 0.166 T\u30010.079 T \u548c 0.0873 T\u3002<\/p>\n<p>\u8fd9\u91cc Bmin \u4e0e Bmax \u91c7\u7528\u7ebf\u6027\u7535\u611f\u8fd1\u4f3c\u4e14\u5ffd\u7565\u5269\u78c1\u3002\u91cd\u8981\u7684\u662f\u6700\u5927\u503c\u5305\u542b\u8c37\u503c\u504f\u7f6e\u3002\u53ea\u62ff \u0394B=0.0786 T \u4e0e\u9971\u548c\u78c1\u5bc6\u6bd4\u8f83\uff0c\u4f1a\u4f4e\u4f30\u7edd\u5bf9\u5cf0\u503c\uff1b\u78c1\u82af\u635f\u8017\u66f2\u7ebf\u4e5f\u9700\u8981\u5339\u914d\u76f4\u6d41\u504f\u7f6e\u3001\u6ce2\u5f62\u548c\u6e29\u5ea6\uff0c\u4e0d\u80fd\u76f4\u63a5\u5957\u6b63\u5f26\u96f6\u504f\u7f6e\u8d44\u6599\u3002<\/p>\n<h3 id=\"244\">24.4 \u73af\u8def\u53f3\u534a\u5e73\u9762\u96f6\u70b9\u68c0\u67e5<\/h3>\n<p>Rload=5\/3 \u03a9\uff0c\u5c06 n=15\u3001D\u22480.24590\u3001Lm=3 mH \u4ee3\u5165\u672c\u6587 RHP \u516c\u5f0f\uff0c\u5f97\u5230\u7ea6 46.0 kHz\u3002\u5b9e\u9645\u73af\u8def\u5e26\u5bbd\u5e94\u663e\u8457\u4f4e\u4e8e\u8be5\u9891\u7387\uff0c\u5e76\u53d7 100 kHz \u5f00\u5173\u4e0e\u5149\u8026\u6781\u70b9\u9650\u5236\u3002\u6700\u4f4e\u8f93\u5165\u3001\u6700\u5927\u8d1f\u8f7d\u901a\u5e38\u9700\u8981\u91cd\u70b9\u68c0\u67e5\uff0c\u4f46\u6700\u7ec8\u8981\u626b\u63cf\u5168\u90e8\u5de5\u4f5c\u70b9\u3002<\/p>\n<p>\u5982\u679c\u628a n\u00b2 \u9519\u653e\u5206\u6bcd\uff0c\u4f1a\u5dee\u56db\u4e2a\u6570\u91cf\u7ea7\u4ee5\u4e0a\uff0c\u8fd9\u662f\u531d\u6bd4\u5b9a\u4e49\u9519\u8bef\u7684\u5178\u578b\u540e\u679c\u3002\u4f7f\u7528\u521d\u7ea7\u7535\u611f\u3001\u6b21\u7ea7\u7535\u611f\u548c\u531d\u6bd4\u65f6\uff0c\u90fd\u5e94\u4fdd\u6301\u540c\u4e00\u53c2\u8003\u4fa7\u3002<\/p>\n<h2 id=\"_14\">\u4e8c\u5341\u4e94\u3001\u635f\u8017\u4e0e\u6548\u7387\uff1a\u628a\u672a\u77e5\u9879\u5199\u51fa\u6765\u518d\u9010\u4e2a\u7f29\u5c0f<\/h2>\n<h3 id=\"251\">25.1 \u4e00\u5f20\u5b8c\u6574\u635f\u8017\u8868<\/h3>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u90e8\u4f4d<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u521d\u7b97\u65b9\u5f0f<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u4e3b\u8981\u672a\u77e5\u9879<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u5165\u6865\u5806<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7ea6 2VF\u00d7\u5e73\u5747\u6574\u6d41\u7535\u6d41<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5145\u7535\u8109\u51b2\u3001\u6e29\u5ea6<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">MOSFET \u5bfc\u901a<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Ip,rms\u00b2\u00d7\u70ed\u6001RDS(on)<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u70ed\u6001\u9a71\u52a8\u4e0e\u6e29\u5347<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">MOSFET \u5f00\u5173<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u80fd\u91cf\u79ef\u5206\u6216\u5408\u7406\u6a21\u578b<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Coss\u3001\u6362\u6d41\u3001\u65f6\u5e8f<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u91c7\u6837\u7535\u963b<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Ip,rms\u00b2\u00d7RCS<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5bc4\u751f\u4e0e\u8109\u51b2\u989d\u5b9a<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6b21\u7ea7\u6574\u6d41<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5e73\u5747VF\u635f\u8017\u4e0e\u52a8\u6001<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6e29\u5ea6\u3001\u6062\u590d\u3001\u7ed3\u7535\u5bb9<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7ed5\u7ec4<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">RMS\u4e0e\u4ea4\u6d41\u7535\u963b<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u9ad8\u9891\u90bb\u8fd1\u3001\u6c14\u9699\u6f0f\u78c1<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u78c1\u82af<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5339\u914d\u6ce2\u5f62\u7684\u5355\u4f4d\u4f53\u79ef\u635f\u8017\u00d7Ve<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6750\u6599\u3001\u504f\u7f6e\u3001\u70ed\u70b9<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">RCD\u4e0eRC<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6bcf\u5468\u671f\u8017\u80fd\u00d7\u9891\u7387<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6f0f\u611f\u516c\u5dee\u3001\u632f\u94c3<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u542f\u52a8\u4e0e\u63a7\u5236<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u9ad8\u538b\u7535\u963b\u53caVCC\u4f9b\u7535\u529f\u7387<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5f85\u673a\u3001\u9a71\u52a8\u3001\u6a21\u5f0f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u53ea\u7b97\u4e09\u9879\u7136\u540e\u628a\u5269\u4f59\u53eb\u201c\u6742\u6563\u96f6\u70b9\u4e00\u74e6\u201d\uff0c\u53ef\u80fd\u63a9\u76d6\u4e3b\u8981\u635f\u8017\u3002\u5e94\u660e\u786e\u6bcf\u9879\u6765\u6e90\uff1a\u624b\u518c\u3001\u8ba1\u7b97\u3001\u4eff\u771f\u3001\u6837\u673a\u6d4b\u91cf\u6216\u6682\u672a\u786e\u8ba4\u3002\u672a\u77e5\u9879\u4e0d\u662f\u96f6\uff0c\u5199\u51fa\u6765\u624d\u80fd\u51b3\u5b9a\u4e0b\u4e00\u6b65\u6d4b\u8bd5\u4ec0\u4e48\u3002<\/p>\n<h3 id=\"252\">25.2 \u94dc\u963b\u968f\u6e29\u5ea6\u53d8\u5316<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>R<sub>T<\/sub>\u2248R\u2082\u2080[1+0.00393(T\u221220 \u2103)]<\/strong><\/p>\n<p>\u5ba4\u6e29\u94dc\u963b\u4e0d\u80fd\u76f4\u63a5\u7528\u4e8e\u70ed\u70b9\u4e00\u767e\u6444\u6c0f\u5ea6\u3002\u7ebf\u957f\u53d6\u81ea\u5e73\u5747\u531d\u957f\u4e0e\u5f15\u7ebf\uff0c\u622a\u9762\u79ef\u53d6\u88f8\u94dc\u5f84\uff0c\u591a\u80a1\u5fc5\u987b\u786e\u8ba4\u5b8c\u6574\u7aef\u63a5\u3002\u9ad8\u9891\u94dc\u635f\u8fd8\u5305\u542b\u4ea4\u6d41\u7535\u963b\u589e\u91cf\uff0c\u5c24\u5176\u662f\u53cd\u6fc0\u4e24\u7ec4\u7ed5\u7ec4\u90fd\u627f\u53d7\u8109\u51b2\uff0cCCM \u4e5f\u4e0d\u80fd\u53ea\u770b\u5f88\u5c0f\u7684\u52b1\u78c1\u7eb9\u6ce2\u800c\u5ffd\u7565\u7ed5\u7ec4\u4ea4\u6d41\u635f\u8017\u3002<\/p>\n<h3 id=\"253\">25.3 \u78c1\u82af\u635f\u8017\u4e0d\u7b49\u4e8e\u9971\u548c\u635f\u8017<\/h3>\n<p>\u78c1\u82af\u672a\u9971\u548c\u4e5f\u4f1a\u53d1\u70ed\uff0c\u635f\u8017\u7531\u9891\u7387\u3001\u78c1\u5bc6\u53d8\u5316\u3001\u6ce2\u5f62\u3001\u6e29\u5ea6\u548c\u6750\u6599\u51b3\u5b9a\u3002\u91c7\u7528\u5382\u5bb6\u5355\u4f4d\u4f53\u79ef\u635f\u8017\u65f6\u8981\u786e\u8ba4\u5b83\u5bf9\u5e94 Bpk \u8fd8\u662f \u0394B\uff0c\u4ee5\u53ca\u6570\u636e\u7684\u6ce2\u5f62\u4e0e\u6e29\u5ea6\u3002\u6b63\u5f26\u6750\u6599\u66f2\u7ebf\u4e0d\u80fd\u672a\u7ecf\u4fee\u6b63\u76f4\u63a5\u5f53\u4f5c\u53cd\u6fc0\u8109\u51b2\u7684\u7cbe\u786e\u7b54\u6848\u3002<\/p>\n<p>\u78c1\u82af\u9971\u548c\u4e3b\u8981\u662f\u77ac\u65f6\u80fd\u529b\u8fb9\u754c\uff0c\u635f\u8017\u662f\u6301\u7eed\u70ed\u95ee\u9898\u3002\u67d0\u8bbe\u8ba1\u51b7\u673a\u4e0d\u9971\u548c\u3001\u8fd0\u884c\u540e\u6e29\u5347\u8fc7\u9ad8\uff0c\u53ef\u80fd\u4f7f\u9ad8\u6e29\u9971\u548c\u4f59\u91cf\u8fdb\u4e00\u6b65\u4e0b\u964d\uff0c\u5f62\u6210\u6076\u6027\u5faa\u73af\u3002\u56e0\u6b64\u7535\u6c14\u4e0e\u70ed\u8fed\u4ee3\u8981\u5171\u540c\u8fdb\u884c\u3002<\/p>\n<h3 id=\"254\">25.4 \u6d4b\u6548\u7387\u4e5f\u6709\u65b9\u6cd5\u8bef\u5dee<\/h3>\n<p>\u4ea4\u6d41\u8f93\u5165\u8981\u6d4b\u6709\u529f\u529f\u7387\uff0c\u4e0d\u80fd\u7528 Vac,rms\u00d7Iac,rms \u5047\u88c5\u771f\u5b9e\u529f\u7387\u3002\u8f93\u51fa\u8981\u5728\u89c4\u5b9a\u91c7\u6837\u70b9\u6d4b Vo\u00d7Io\uff0c\u5e76\u660e\u786e\u8fde\u63a5\u5668\u548c\u7ebf\u7f06\u635f\u8017\u662f\u5426\u5c5e\u4e8e\u7535\u6e90\u3002\u8f7b\u8f7d\u51e0\u767e\u6beb\u74e6\u635f\u8017\u4e0e\u4eea\u8868\u8bef\u5dee\u53ef\u80fd\u63a5\u8fd1\uff0c\u5e94\u4f7f\u7528\u9002\u5408\u91cf\u7a0b\u7684\u529f\u7387\u8ba1\u3002<\/p>\n<p>\u6d4b\u6e29\u548c\u6d4b\u6548\u7387\u9700\u8981\u8fbe\u5230\u70ed\u7a33\u5b9a\uff0c\u8bb0\u5f55\u73af\u5883\u3001\u5916\u58f3\u3001\u65b9\u5411\u548c\u98ce\u901f\u3002\u4e0d\u8981\u7528\u51b7\u673a\u4e00\u5206\u949f\u7684\u6548\u7387\u4e0e\u70ed\u6001\u4e00\u5c0f\u65f6\u7684\u6ce2\u5f62\u62fc\u6210\u4e00\u4e2a\u62a5\u544a\u3002\u4e0d\u540c\u8f93\u5165\u7535\u538b\u4e0e\u8d1f\u8f7d\u70b9\u90fd\u8981\u6d4b\uff0c\u5355\u4e00\u6ee1\u8f7d\u6570\u503c\u4e0d\u80fd\u63cf\u8ff0\u6574\u673a\u6027\u80fd\u3002<\/p>\n<h2 id=\"pcb\">\u4e8c\u5341\u516d\u3001PCB \u5e03\u5c40\uff1a\u4e09\u4e2a\u9ad8\u9891\u56de\u8def\u548c\u4e00\u6761\u9694\u79bb\u8fb9\u754c<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-15-layout.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"PCB\u4e2d\u521d\u7ea7\u5f00\u5173\u3001\u94b3\u4f4d\u3001\u6b21\u7ea7\u6574\u6d41\u4e09\u4e2a\u5173\u952e\u56de\u8def\u4e0e\u9694\u79bb\u533a\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-15-layout.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"261\">26.1 \u521d\u7ea7\u4e3b\u5f00\u5173\u56de\u8def<\/h3>\n<p>\u6bcd\u7ebf\u5c40\u90e8\u65c1\u8def\u6b63\u7aef\u3001\u521d\u7ea7\u3001MOSFET\u3001\u91c7\u6837\u7535\u963b\u3001\u65c1\u8def\u8d1f\u7aef\u6784\u6210\u5bfc\u901a\u5927 di\/dt \u56de\u8def\u3002\u5b83\u5e94\u77ed\u4e14\u7d27\u51d1\uff0c\u907f\u514d\u8de8\u8d8a\u6574\u5757\u677f\u3002\u5927\u50a8\u80fd\u7535\u5bb9\u8ddd\u79bb\u8f83\u8fdc\u65f6\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u5408\u9002\u9ad8\u9891\u65c1\u8def\uff0c\u964d\u4f4e\u5c40\u90e8\u56de\u8def\u7535\u611f\uff0c\u4f46\u989d\u5b9a\u7535\u538b\u4e0e\u7eb9\u6ce2\u80fd\u529b\u8981\u5339\u914d\u3002<\/p>\n<p>\u6f0f\u6781\u662f\u9ad8 dv\/dt \u8282\u70b9\uff0c\u94dc\u9762\u79ef\u5e94\u5728\u6563\u70ed\u548c\u566a\u58f0\u4e4b\u95f4\u5e73\u8861\u3002\u4e0d\u8981\u628a\u6f0f\u6781\u94dc\u94fa\u5230\u8f93\u5165\u7ebf\u3001\u5149\u8026\u6216\u6b21\u7ea7\u4e0b\u65b9\uff0c\u4e5f\u4e0d\u8981\u8ba9\u6805\u6781\u68c0\u6d4b\u4e0e\u6f0f\u6781\u957f\u8ddd\u79bb\u5e73\u884c\u3002\u5e03\u5c40\u5f15\u8d77\u7684\u632f\u94c3\u4e0d\u662f\u4e00\u4e2a\u201c\u7406\u60f3\u78c1\u4ef6\u6f0f\u611f\u201d\u503c\u80fd\u5b8c\u5168\u9884\u6d4b\u7684\u3002<\/p>\n<h3 id=\"262\">26.2 \u94b3\u4f4d\u56de\u8def<\/h3>\n<p>MOSFET \u6f0f\u6781\u3001\u94b3\u4f4d\u4e8c\u6781\u7ba1\u3001\u94b3\u4f4d\u7535\u5bb9\u548c\u521d\u7ea7\u6bcd\u7ebf\u7aef\u5f62\u6210\u6362\u6d41\u56de\u8def\u3002\u4f18\u5148\u8ba9\u5b83\u9760\u8fd1\u5f00\u5173\u4e0e\u53d8\u538b\u5668\uff0c\u51cf\u5c11\u8fde\u63a5\u7535\u611f\u3002\u94b3\u4f4d\u7535\u963b\u53ef\u4ee5\u6309\u70ed\u8bbe\u8ba1\u5e03\u7f6e\uff0c\u4f46\u7535\u5bb9\u4e0e\u4e8c\u6781\u7ba1\u627f\u62c5\u5feb\u901f\u7535\u6d41\u7684\u8def\u5f84\u4e0d\u80fd\u7ed5\u8fdc\u3002<\/p>\n<p>\u5982\u679c\u94b3\u4f4d\u5df2\u7ecf\u5728\u6b63\u786e\u7535\u538b\u52a8\u4f5c\uff0c\u6f0f\u6781\u4ecd\u51fa\u73b0\u5f88\u7a84\u7684\u8d85\u9ad8\u5c16\u5cf0\uff0c\u53ef\u80fd\u662f\u5e03\u5c40\u6216\u4e8c\u6781\u7ba1\u52a8\u6001\uff0c\u800c\u4e0d\u662f\u7535\u5bb9\u6574\u4f53\u5145\u5f97\u4e0d\u591f\u3002\u5148\u7f29\u77ed\u56de\u8def\u5e76\u786e\u8ba4\u63a2\u5934\u65b9\u5f0f\uff0c\u518d\u8c03\u6574\u5143\u4ef6\u3002<\/p>\n<h3 id=\"263\">26.3 \u6b21\u7ea7\u6574\u6d41\u56de\u8def<\/h3>\n<p>\u6b21\u7ea7\u7ed5\u7ec4\u3001\u6574\u6d41\u5668\u4e0e\u7b2c\u4e00\u7ec4\u8f93\u51fa\u7535\u5bb9\u7ec4\u6210\u8109\u51b2\u5145\u7535\u56de\u8def\uff0c\u5e94\u5c3d\u91cf\u77ed\u3002\u5927\u7535\u6d41\u56de\u6d41\u4e0d\u80fd\u7ecf\u8fc7 TL431 \u5206\u538b\u7684\u5730\u7ebf\uff1b\u53cd\u9988\u6700\u597d\u4ece\u8f93\u51fa\u7535\u5bb9\u7684\u5b89\u9759\u7aef\u70b9\u91c7\u6837\uff0c\u5fc5\u8981\u65f6\u91c7\u7528\u72ec\u7acb\u7ec6\u7ebf\u3002<\/p>\n<p>\u6574\u6d41\u5668\u70ed\u94dc\u533a\u4e5f\u8981\u63a7\u5236\u7535\u573a\u8026\u5408\u548c\u9694\u79bb\u8def\u5f84\u3002\u8f93\u51fa\u7ebf\u7f06\u4ece\u54ea\u4e2a\u4f4d\u7f6e\u63a5\u51fa\u4f1a\u5f71\u54cd\u53cd\u9988\u770b\u5230\u7684\u7535\u538b\u53ca\u5171\u963b\u6297\u566a\u58f0\uff0c\u8bbe\u8ba1\u65f6\u5c31\u5e94\u5b9a\u4e49\u8d1f\u8f7d\u4e0e\u53cd\u9988\u53d6\u70b9\uff0c\u800c\u4e0d\u662f\u8c03\u8bd5\u540e\u4e34\u65f6\u98de\u7ebf\u4fee\u8865\u3002<\/p>\n<h3 id=\"264-csvcc\">26.4 \u6805\u6781\u3001CS\u3001VCC \u548c\u53cd\u9988\u7ebf<\/h3>\n<p>\u6805\u6781\u9a71\u52a8\u56de\u8def\u8981\u7d27\u51d1\uff0cVCC \u53bb\u8026\u9760\u8fd1\u82af\u7247\uff1bCS \u6ee4\u6ce2\u8d34\u8fd1\u5f15\u811a\uff0c\u91c7\u6837\u4ece\u7535\u963b\u72ec\u7acb\u5f15\u51fa\uff1bCOMP \u4e0e\u53cd\u9988\u5c5e\u4e8e\u4f4e\u566a\u58f0\u8282\u70b9\uff0c\u8fdc\u79bb\u6f0f\u6781\u548c\u53d8\u538b\u5668\u9ad8\u538b\u7aef\u3002\u4e0d\u8981\u8ba9\u529f\u7387\u7535\u6d41\u7ecf\u8fc7\u63a7\u5236\u5668\u4fe1\u53f7\u5730\u518d\u8fd4\u56de\u6bcd\u7ebf\u3002<\/p>\n<p>\u7535\u8def\u56fe\u4e0a\u6240\u6709\u70ed\u5730\u753b\u6210\u540c\u4e00\u7b26\u53f7\uff0cPCB \u4e0a\u5374\u4e0d\u80fd\u968f\u673a\u8fde\u63a5\u3002\u7535\u4f4d\u76f8\u540c\u4e0d\u4ee3\u8868\u52a8\u6001\u963b\u6297\u4e3a\u96f6\u3002\u516c\u5171\u94dc\u6bb5\u4ea7\u751f\u7684\u7535\u538b\u53ef\u80fd\u5728\u91c7\u6837\u4e0a\u88ab\u653e\u5927\u6210\u5047\u7535\u6d41\u6216\u5047\u53cd\u9988\u3002<\/p>\n<h3 id=\"265\">26.5 \u9694\u79bb\u533a\u3001\u5f00\u69fd\u548c\u5b89\u89c4\u5668\u4ef6<\/h3>\n<p>\u521d\u6b21\u7ea7\u4e4b\u95f4\u4fdd\u6301\u89c4\u5b9a\u7a7a\u6c14\u8ddd\u79bb\u3001\u6cbf\u8868\u9762\u8ddd\u79bb\u548c\u56fa\u4f53\u7edd\u7f18\u3002\u5177\u4f53\u6570\u503c\u4f9d\u8d56\u5de5\u4f5c\u7535\u538b\u3001\u77ac\u6001\u3001\u6c61\u67d3\u3001\u6750\u6599\u3001\u6d77\u62d4\u548c\u4ea7\u54c1\u6807\u51c6\uff0c\u4e0d\u80fd\u7528\u4e00\u4e2a\u901a\u7528\u6beb\u7c73\u6570\u8986\u76d6\u6240\u6709\u7535\u6e90\u3002\u5f00\u69fd\u53ef\u80fd\u6539\u5584\u8868\u9762\u8def\u5f84\uff0c\u4f46\u4e0d\u80fd\u81ea\u52a8\u89e3\u51b3\u5f15\u811a\u3001\u80f6\u5e26\u8fb9\u7f18\u548c\u53d8\u538b\u5668\u5185\u90e8\u4e0d\u8db3\u3002<\/p>\n<p>\u8de8\u9694\u79bb\u533a\u7684\u5149\u8026\u3001\u53d8\u538b\u5668\u548c Y \u7535\u5bb9\u8981\u9002\u914d\u6240\u9700\u7edd\u7f18\u4f53\u7cfb\u3002\u4e0d\u8981\u56e0\u4e3a\u666e\u901a\u7535\u5bb9\u8010\u538b\u5f88\u9ad8\u5c31\u628a\u5b83\u5f53 Y \u7535\u5bb9\u3002\u963b\u710a\u4e5f\u4e0d\u80fd\u65e0\u6761\u4ef6\u5f53\u6210\u5b89\u5168\u56fa\u4f53\u7edd\u7f18\u3002\u8be6\u7ec6\u8ddd\u79bb\u5e94\u7531\u76ee\u6807\u4ea7\u54c1\u7684\u89c4\u8303\u786e\u5b9a\u5e76\u8bb0\u5f55\u3002<\/p>\n<h3 id=\"266-emi\">26.6 EMI \u7684\u5dee\u6a21\u4e0e\u5171\u6a21<\/h3>\n<p>\u5dee\u6a21\u566a\u58f0\u4e3b\u8981\u6cbf\u8f93\u5165\u4e24\u7ebf\u76f8\u53cd\u65b9\u5411\u6d41\u52a8\uff0c\u4e0e\u8109\u51b2\u7535\u6d41\u548c\u6ee4\u6ce2\u963b\u6297\u6709\u5173\uff1b\u5171\u6a21\u566a\u58f0\u901a\u8fc7\u5bc4\u751f\u7535\u5bb9\u548c\u5bf9\u5730\u8def\u5f84\u6d41\u52a8\uff0c\u4e0e\u9ad8 dv\/dt \u8282\u70b9\u6709\u5173\u3002\u4e09\u660e\u6cbb\u964d\u4f4e\u6f0f\u611f\u53ef\u80fd\u540c\u65f6\u589e\u52a0\u521d\u6b21\u7ea7\u7535\u5bb9\uff0c\u56e0\u6b64\u4e00\u9879\u4f18\u5316\u53ef\u80fd\u6539\u5584\u5c16\u5cf0\u5374\u6076\u5316\u5171\u6a21\u3002<\/p>\n<p>Y \u7535\u5bb9\u63d0\u4f9b\u53d7\u63a7\u9ad8\u9891\u8fd4\u56de\u8def\u5f84\uff0c\u540c\u65f6\u5f71\u54cd\u89e6\u6478\u7535\u6d41\uff1b\u5171\u6a21\u7535\u611f\u548c\u7ed5\u7ec4\u5c4f\u853d\u4e5f\u6539\u53d8\u566a\u58f0\u8def\u5f84\u3002\u5c4f\u853d\u4e0d\u80fd\u5f62\u6210\u95ed\u5408\u77ed\u8def\u531d\uff0c\u8fde\u63a5\u4f4d\u7f6e\u9700\u8981\u7ed3\u5408\u566a\u58f0\u4e0e\u7edd\u7f18\u8bbe\u8ba1\u3002EMI \u6700\u7ec8\u4f9d\u9760\u89c4\u5b9a\u6d4b\u8bd5\u73af\u5883\u786e\u8ba4\uff0c\u4e0d\u80fd\u53ea\u51ed\u793a\u6ce2\u5668\u8f93\u51fa\u7eb9\u6ce2\u5224\u65ad\u3002<\/p>\n<h2 id=\"_15\">\u4e8c\u5341\u4e03\u3001\u4ece\u7b2c\u4e00\u6b21\u4e0a\u7535\u5230\u6ee1\u8f7d\u9a8c\u8bc1\u7684\u6b65\u9aa4<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-16-test-flow.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" style=\"display:block;max-width:100%;height:auto;margin:26px auto\" loading=\"lazy\" alt=\"\u53cd\u6fc0\u6837\u673a\u4ece\u9759\u6001\u68c0\u67e5\u5230\u9650\u6d41\u542f\u52a8\u3001\u6ce2\u5f62\u3001\u73af\u8def\u4e0e\u70ed\u6d4b\u8bd5\u7684\u6d41\u7a0b\" data-original=\"https:\/\/www.oldhamburger.cn\/wp-content\/uploads\/2026\/10\/flyback-16-test-flow.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" \/><\/div><\/p>\n<h3 id=\"271\">27.1 \u65ad\u7535\u5148\u68c0\u67e5\u54ea\u4e9b\u9879\u76ee<\/h3>\n<p>\u6838\u5bf9\u78c1\u4ef6\u7aef\u70b9\u3001\u540c\u540d\u7aef\u3001\u521d\u7ea7\u4e32\u8054\u5173\u7cfb\u4e0e\u6b21\u7ea7\u6574\u6d41\u65b9\u5411\u3002\u6d4b\u521d\u7ea7\u3001\u6b21\u7ea7\u548c\u8f85\u52a9\u7684\u8fde\u901a\u3001DCR\u3001\u531d\u6bd4\u3001\u52b1\u78c1\u7535\u611f\u53ca\u6307\u5b9a\u77ed\u8def\u6761\u4ef6\u4e0b\u7684\u6f0f\u611f\uff0c\u786e\u8ba4\u4e0d\u540c\u7535\u4f4d\u533a\u6ca1\u6709\u610f\u5916\u5bfc\u901a\u3002\u68c0\u67e5\u529f\u7387\u5668\u4ef6\u5c01\u88c5\u811a\u4f4d\u3001\u5149\u8026\u65b9\u5411\u3001\u6865\u5806\u6781\u6027\u548c\u7535\u89e3\u7535\u5bb9\u6781\u6027\u3002<\/p>\n<p>\u540c\u65f6\u68c0\u67e5\u710a\u63a5\u3001\u94dc\u5c51\u3001\u9694\u79bb\u533a\u3001\u78c1\u82af\u88c2\u7eb9\u548c\u80f6\u5e26\u7834\u635f\u3002\u4e07\u7528\u8868\u8702\u9e23\u5e76\u4e0d\u80fd\u6392\u9664\u4e00\u531d\u77ed\u8def\uff0c\u4e5f\u4e0d\u80fd\u8bc1\u660e\u591a\u80a1\u5168\u90e8\u710a\u4e0a\u3002\u78c1\u4ef6\u6d4b\u8bd5\u8981\u6709\u660e\u786e\u5e45\u503c\u4e0e\u9891\u7387\uff0c\u4e0d\u8981\u968f\u610f\u7ed9\u7ed5\u7ec4\u65bd\u52a0\u4f4e\u9891\u9ad8\u5e45\u4fe1\u53f7\u5bfc\u81f4\u9971\u548c\u3002<\/p>\n<h3 id=\"272\">27.2 \u5206\u5f00\u68c0\u67e5\u63a7\u5236\u5668\u4e0e\u529f\u7387\u7ea7<\/h3>\n<p>\u5728\u7b26\u5408\u63a7\u5236\u5668\u8981\u6c42\u7684\u9694\u79bb\u4f4e\u538b VCC \u4f9b\u7535\u6761\u4ef6\u4e0b\uff0c\u53ef\u5148\u6838\u5bf9\u9891\u7387\u3001\u542f\u52a8\u9608\u503c\u3001\u6805\u6781\u8f93\u51fa\u548c\u53cd\u9988\u4f5c\u7528\u65b9\u5411\uff0c\u518d\u52a0\u5165\u53d7\u63a7\u6bcd\u7ebf\u6d4b\u8bd5\u3002\u5916\u4f9b VCC \u53ef\u80fd\u6539\u53d8\u539f\u7cfb\u7edf\u542f\u52a8\u4e0e\u4fdd\u62a4\uff0c\u5fc5\u987b\u77e5\u9053\u5b83\u4e0e\u5185\u90e8\u542f\u52a8\u6e90\u662f\u5426\u4f1a\u4e92\u76f8\u704c\u7535\u3002<\/p>\n<p>\u5e02\u7535\u6837\u673a\u5e94\u7531\u5177\u5907\u6761\u4ef6\u7684\u4eba\u4f7f\u7528\u9002\u5f53\u9694\u79bb\u4e0e\u9650\u6d41\u8bbe\u5907\u6d4b\u8bd5\u3002\u8c03\u538b\u5668\u901a\u5e38\u53ea\u6539\u53d8\u7535\u538b\uff0c\u4e0d\u4e00\u5b9a\u9694\u79bb\uff1b\u9694\u79bb\u53d8\u538b\u5668\u4e5f\u4e0d\u8ba9\u9ad8\u538b\u6bcd\u7ebf\u5931\u53bb\u5371\u9669\u6027\u3002\u6d4b\u91cf\u63a2\u5934\u5fc5\u987b\u9002\u914d\u5171\u6a21\u3001\u5dee\u6a21\u3001\u8010\u538b\u4e0e\u5e26\u5bbd\uff0c\u4e0d\u80fd\u62c6\u9664\u793a\u6ce2\u5668\u4fdd\u62a4\u5730\u53bb\u201c\u6d6e\u5730\u6d4b\u91cf\u201d\u3002<\/p>\n<h3 id=\"273-vcc\">27.3 \u7b2c\u4e00\u6b21\u542f\u52a8\u5148\u770b VCC \u4e0e\u7535\u6d41<\/h3>\n<p>\u89c2\u5bdf VCC \u5145\u7535\u3001\u8fbe\u5230\u542f\u52a8\u9608\u503c\u3001\u5f00\u5173\u51fa\u73b0\u3001\u8f85\u52a9\u63a5\u7ba1\u7684\u987a\u5e8f\u3002\u82e5\u6bcf\u9694\u51e0\u5341\u6beb\u79d2\u91cd\u590d\uff0c\u8981\u5148\u67e5 VCC \u662f\u5426\u8dcc\u5230\u5173\u65ad\u9608\u503c\u3002\u82e5\u5f00\u5173\u4e00\u51fa\u73b0\u5c31\u51fa\u73b0\u5f02\u5e38\u7535\u6d41\uff0c\u5e94\u68c0\u67e5\u6781\u6027\u3001\u77ed\u8def\u3001\u91c7\u6837\u548c\u78c1\u4ef6\uff0c\u4e0d\u8981\u7ee7\u7eed\u52a0\u8f93\u5165\u8bd5\u56fe\u8ba9\u8f93\u51fa\u201c\u9876\u8d77\u6765\u201d\u3002<\/p>\n<p>\u7a7a\u8f7d\u4e5f\u53ef\u80fd\u89e6\u53d1\u8df3\u8109\u51b2\u6216\u7a81\u53d1\uff0c\u4e0d\u80fd\u4ec5\u56e0\u4e3a\u9891\u7387\u4e0d\u56fa\u5b9a\u5c31\u5224\u6545\u969c\u3002\u6839\u636e\u63a7\u5236\u5668\u6a21\u5f0f\u89e3\u91ca\u6ce2\u5f62\uff0c\u518d\u6dfb\u52a0\u9002\u5f53\u8d1f\u8f7d\u3002\u5b9e\u9645\u9996\u8f6e\u5141\u8bb8\u8d1f\u8f7d\u548c\u8f93\u5165\u8303\u56f4\u5e94\u7531\u6d4b\u8bd5\u65b9\u6848\u5b9a\u4e49\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u5728\u6700\u9ad8\u5e02\u7535\u6ee1\u8f7d\u8fd0\u884c\u3002<\/p>\n<h3 id=\"274\">27.4 \u9010\u6b65\u8bb0\u5f55\u6ce2\u5f62<\/h3>\n<p>\u8bb0\u5f55\u6700\u4f4e\u3001\u6807\u79f0\u548c\u6700\u9ad8\u6bcd\u7ebf\u4e0b\u7684\u6805\u6781\u3001\u6f0f\u6781\u3001\u521d\u7ea7\u7535\u6d41\u3001\u6b21\u7ea7\u53cd\u538b\u3001\u8f85\u52a9\u4f9b\u7535\u548c\u8f93\u51fa\u3002\u7528\u5fae\u79d2\u65f6\u57fa\u770b\u5355\u5468\u671f\uff0c\u7528\u6beb\u79d2\u65f6\u57fa\u770b\u542f\u52a8\u3001100 Hz \u5305\u7edc\u548c\u4fdd\u62a4\u3002\u4e24\u79cd\u65f6\u95f4\u5c3a\u5ea6\u53ef\u80fd\u66b4\u9732\u5b8c\u5168\u4e0d\u540c\u7684\u95ee\u9898\u3002<\/p>\n<p>\u4e3b\u7b97\u4f8b\u6b63\u5e38\u6700\u4f4e\u6bcd\u7ebf\u5e94\u770b\u5230\u7ea6 2.04 \u03bcs \u5bfc\u901a\u3001\u7ea6 5.97 \u03bcs \u9001\u80fd\u548c\u7ea6 1.99 \u03bcs \u7a7a\u95f2\uff1b\u5b9e\u9645\u635f\u8017\u4f1a\u4f7f\u6570\u5b57\u53d8\u5316\uff0c\u4f46\u82e5\u7ed3\u6784\u5b8c\u5168\u4e0d\u540c\uff0c\u5e94\u56de\u5230\u6a21\u578b\u68c0\u67e5\u3002\u6d4b\u5f97\u529f\u7387\u4e0d\u80fd\u4ec5\u9760\u5c16\u5cf0\u5e45\u503c\u4f30\u7b97\uff0c\u8981\u533a\u5206\u52b1\u78c1\u659c\u5761\u4e0e\u5bc4\u751f\u5c16\u5cf0\u3002<\/p>\n<h3 id=\"275\">27.5 \u8f93\u51fa\u7eb9\u6ce2\u6d4b\u91cf<\/h3>\n<p>\u5728\u8f93\u51fa\u7535\u5bb9\u6216\u89c4\u5b9a\u8d1f\u8f7d\u70b9\u4f7f\u7528\u77ed\u56de\u8def\u63a2\u6d4b\uff0c\u5fc5\u8981\u65f6\u4f7f\u7528\u540c\u8f74\u6216\u5730\u5f39\u7c27\uff0c\u660e\u786e\u5e26\u5bbd\u9650\u5236\u3002\u957f\u5730\u7ebf\u53ef\u80fd\u628a\u5916\u90e8\u78c1\u573a\u611f\u5e94\u6210\u865a\u5047\u5c16\u5cf0\u3002\u8bb0\u5f55\u7eb9\u6ce2\u65f6\u8bf4\u660e\u662f\u5cf0\u5cf0\u503c\u3001RMS \u8fd8\u662f\u67d0\u9891\u6bb5\u79ef\u5206\uff0c\u4e0d\u80fd\u6df7\u7528\u3002<\/p>\n<p>\u9ad8\u538b\u6f0f\u6781\u6d4b\u91cf\u53c8\u9700\u8981\u5408\u9002\u5dee\u5206\u63a2\u5934\uff0c\u4e0d\u80fd\u4e3a\u4e86\u83b7\u5f97\u6f02\u4eae\u6ce2\u5f62\u800c\u4f7f\u7528\u4e0d\u7b26\u5408\u8010\u538b\u7684\u5730\u5f39\u7c27\u65b9\u6cd5\u3002\u4e0d\u540c\u8282\u70b9\u91c7\u53d6\u4e0d\u540c\u6d4b\u91cf\u5de5\u5177\uff0c\u76ee\u7684\u90fd\u662f\u8ba9\u6ce2\u5f62\u771f\u5b9e\u800c\u4e14\u8fde\u63a5\u7b26\u5408\u7535\u4f4d\u8981\u6c42\u3002<\/p>\n<h3 id=\"276\">27.6 \u70ed\u7a33\u6001\u3001\u8d1f\u8f7d\u9636\u8dc3\u4e0e\u4fdd\u62a4<\/h3>\n<p>\u8fbe\u5230\u76ee\u6807\u8f93\u5165\u548c\u8d1f\u8f7d\u540e\u8fd0\u884c\u5230\u63a5\u8fd1\u70ed\u7a33\u5b9a\uff0c\u8bb0\u5f55\u73af\u5883\u3001\u58f3\u4f53\u3001\u78c1\u4ef6\u3001\u6574\u6d41\u5668\u3001\u94b3\u4f4d\u7535\u963b\u4e0e\u4e3b\u5f00\u5173\u6e29\u5ea6\u3002\u9010\u9879\u505a\u8d1f\u8f7d\u9636\u8dc3\u3001\u8fc7\u8f7d\u3001\u77ed\u8def\u6062\u590d\u548c\u8f93\u5165\u542f\u505c\uff0c\u907f\u514d\u4e00\u6b21\u6539\u53d8\u591a\u4e2a\u6761\u4ef6\u540e\u65e0\u6cd5\u5224\u65ad\u539f\u56e0\u3002<\/p>\n<p>\u6d4b\u8bd5\u8bb0\u5f55\u5305\u542b\u6761\u4ef6\u3001\u6570\u503c\u3001\u9650\u5236\u548c\u7ed3\u8bba\u3002\u6bd4\u5982\u201c\u6ee1\u8f7d\u6b63\u5e38\u201d\u4e0d\u5982\u201c198 V AC\u30012 A\u3001\u5c01\u95ed\u58f3\u4f53\u3001\u73af\u5883\u56db\u5341\u5ea6\uff0c\u8fd0\u884c\u81f3\u6e29\u5ea6\u7a33\u5b9a\u540e\u8f93\u51fa\u591a\u5c11\u3001\u6700\u9ad8\u5c16\u5cf0\u591a\u5c11\u3001\u5404\u70ed\u70b9\u591a\u5c11\u201d\u3002\u4e00\u4efd\u53ef\u590d\u73b0\u8bb0\u5f55\u80fd\u5e2e\u52a9\u4e0b\u4e00\u7248\uff0c\u800c\u8bb0\u5fc6\u4e2d\u7684\u201c\u4e0a\u6b21\u597d\u50cf\u6ca1\u95ee\u9898\u201d\u4e0d\u80fd\u3002<\/p>\n<h2 id=\"_16\">\u4e8c\u5341\u516b\u3001\u5e38\u89c1\u6545\u969c\uff1a\u4ece\u73b0\u8c61\u56de\u5230\u6ce2\u5f62\u4e0e\u6a21\u578b<\/h2>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u73b0\u8c61<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u4f18\u5148\u68c0\u67e5<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u4e0d\u5b9c\u76f4\u63a5\u505a\u7684\u8c03\u6574<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa\u4e0d\u8d77\u6765<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">VCC\u542f\u52a8\u3001\u78c1\u4ef6\u6781\u6027\u3001\u53cd\u9988\u3001\u77ed\u8def<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u76f2\u76ee\u52a0\u5927\u5cf0\u503c<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u542f\u52a8\u540e\u5468\u671f\u6027\u505c\u673a<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">UVLO\u3001\u8f85\u52a9\u4f9b\u7535\u3001\u542f\u52a8\u8d1f\u8f7d<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u53ea\u589e\u5927\u8f93\u51fa\u7535\u5bb9<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">MOSFET\u5f88\u70ed<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5f00\u5173\u635f\u8017\u3001\u94b3\u4f4d\u3001\u9a71\u52a8\u3001Coss<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u53ea\u6362\u66f4\u4f4eRDS(on)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6574\u6d41\u5668\u5f88\u70ed<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">VF\u3001RMS\u3001\u53cd\u538b\u3001\u6062\u590d\u3001\u6563\u70ed<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4ec5\u770b\u5e73\u5747\u989d\u5b9a\u5b89\u6570<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u78c1\u4ef6\u5f88\u70ed<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6750\u6599\u3001\u0394B\u3001\u94dc\u635f\u3001\u6c14\u9699\u6f0f\u78c1<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u968f\u610f\u78e8\u5927\u6c14\u9699<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6f0f\u6781\u5c16\u5cf0\u9ad8<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6f0f\u611f\u3001\u94b3\u4f4d\u5b9a\u4e49\u3001\u5e03\u5c40\u3001\u63a2\u5934<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u968f\u610f\u5806\u5e76\u8054\u7535\u5bb9<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6ee1\u8f7d\u6389\u538b<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6bcd\u7ebf\u8c37\u503c\u3001\u9650\u6d41\u3001\u9001\u80fd\u3001\u7ebf\u635f<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8c03\u9ad8\u7a7a\u8f7d\u8f93\u51fa\u63a9\u76d6<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u76f8\u90bb\u5468\u671f\u4e00\u9ad8\u4e00\u4f4e<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">CCM\u6b21\u8c10\u6ce2\u3001\u659c\u5761\u3001\u91c7\u6837<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u53ea\u6539\u5916\u73af\u5927\u7535\u5bb9<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f7b\u8f7d\u5578\u53eb<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7a81\u53d1\u9891\u7387\u3001\u7ed3\u6784\u632f\u52a8\u3001\u73af\u8def<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5ba3\u79f0\u78c1\u82af\u5df2\u9971\u548c<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa\u6162\u901f\u547c\u5438<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u53cd\u9988\u73af\u3001VCC\u3001\u4fdd\u62a4\u3001100Hz\u8f93\u5165<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4e0d\u5206\u65f6\u95f4\u5c3a\u5ea6\u8c03\u53c2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 id=\"281\">28.1 \u8f93\u51fa\u4f4e\u4e0d\u4e00\u5b9a\u662f\u531d\u6570\u5c11<\/h3>\n<p>\u6bcd\u7ebf\u8c37\u503c\u964d\u4f4e\u3001\u63a7\u5236\u5668\u89e6\u53ca\u6700\u5927\u8109\u5bbd\u3001\u53cd\u9988\u6ca1\u6709\u8db3\u591f\u7535\u6d41\u3001\u6574\u6d41\u538b\u964d\u3001\u7ebf\u7f06\u548c\u8fc7\u6d41\u9650\u5236\uff0c\u90fd\u53ef\u80fd\u9020\u6210\u6389\u538b\u3002\u5148\u786e\u8ba4\u8d1f\u8f7d\u70b9\u3001\u8f93\u5165\u8c37\u503c\u3001\u5cf0\u503c\u6307\u4ee4\u548c\u662f\u5426\u8fdb\u5165\u4fdd\u62a4\uff0c\u518d\u51b3\u5b9a\u4fee\u6539\u78c1\u4ef6\u3002<\/p>\n<p>\u82e5\u5f3a\u884c\u589e\u52a0\u6b21\u7ea7\u531d\u6570\uff0c\u53cd\u5c04\u7535\u538b\u4f1a\u964d\u4f4e\u3001\u9000\u78c1\u65f6\u95f4\u53ef\u80fd\u53d8\u957f\u3001\u6b21\u7ea7\u53cd\u538b\u4f1a\u63d0\u9ad8\uff0c\u8fd8\u53ef\u80fd\u6539\u53d8\u8f85\u52a9\u4f9b\u7535\u3002\u4e00\u4e2a\u770b\u4f3c\u53ea\u5f71\u54cd\u8f93\u51fa\u7684\u6539\u52a8\u5b9e\u9645\u7275\u52a8\u6574\u6761\u8ba1\u7b97\u94fe\uff0c\u5fc5\u987b\u91cd\u65b0\u68c0\u67e5\u3002<\/p>\n<h3 id=\"282\">28.2 \u6ce2\u5f62\u540e\u6bb5\u53d8\u9661\u8981\u7279\u522b\u5173\u6ce8<\/h3>\n<p>\u6b63\u5e38\u6052\u5b9a\u7ed5\u7ec4\u7535\u538b\u4e0b\uff0c\u7535\u6d41\u659c\u7387\u8fd1\u4f3c\u6052\u5b9a\u3002\u540e\u6bb5\u7a81\u7136\u53d8\u9661\u53ef\u80fd\u662f\u7535\u611f\u968f\u78c1\u5bc6\u4e0b\u964d\u3001\u9971\u548c\u6216\u6d4b\u91cf\u95ee\u9898\u3002\u540c\u6b65\u89c2\u5bdf\u7ed5\u7ec4\u7535\u538b\uff0c\u786e\u8ba4\u4e0d\u662f\u63a7\u5236\u72b6\u6001\u53d8\u5316\u3002\u9971\u548c\u7591\u70b9\u4e0d\u80fd\u901a\u8fc7\u7ee7\u7eed\u589e\u5927\u9650\u6d41\u8bd5\u63a2\uff0c\u5e94\u68c0\u67e5\u531d\u6570\u3001AL\u3001\u6750\u6599\u548c\u5f02\u5e38\u4f0f\u79d2\u3002<\/p>\n<h3 id=\"283\">28.3 \u566a\u58f0\u4e0e\u771f\u5b9e\u8fc7\u6d41\u5206\u5f00\u770b<\/h3>\n<p>\u5f00\u901a\u5c16\u5cf0\u77ed\u800c\u9ad8\uff0c\u53ef\u80fd\u6765\u81ea\u5bc4\u751f\u7535\u5bb9\u6216\u4e8c\u6781\u7ba1\u52a8\u6001\uff1b\u771f\u5b9e\u52b1\u78c1\u659c\u5761\u5219\u6301\u7eed\u6574\u4e2a\u5bfc\u901a\u533a\u95f4\u3002\u63a7\u5236\u5668\u524d\u6cbf\u6d88\u9690\u548c RC \u6ee4\u6ce2\u4f1a\u6539\u53d8\u5b83\u770b\u5230\u7684\u6ce2\u5f62\u3002\u6539\u5584\u5e03\u5c40\u548c\u9002\u5f53\u6ee4\u6ce2\u53ef\u4ee5\u51cf\u5c11\u8bef\u89e6\u53d1\uff0c\u4f46\u8fc7\u5f3a\u6ee4\u6ce2\u4f1a\u589e\u52a0\u771f\u6b63\u9650\u6d41\u5ef6\u65f6\u3002<\/p>\n<h3 id=\"284\">28.4 \u6bcf\u8f6e\u53ea\u4fee\u6539\u5c11\u6570\u53ef\u89e3\u91ca\u53c2\u6570<\/h3>\n<p>\u8bb0\u5f55\u4fee\u6539\u524d\u540e\u7684\u78c1\u4ef6\u3001\u7535\u963b\u3001\u7535\u5bb9\u3001\u6ce2\u5f62\u3001\u6548\u7387\u548c\u6e29\u5347\uff0c\u7ed9\u6837\u673a\u7f16\u53f7\u3002\u4e00\u6b21\u540c\u65f6\u6539\u531d\u6570\u3001\u6c14\u9699\u3001\u94b3\u4f4d\u548c\u8865\u507f\uff0c\u5373\u4f7f\u95ee\u9898\u6d88\u5931\uff0c\u4e5f\u96be\u4ee5\u89e3\u91ca\u662f\u54ea\u9879\u6709\u6548\u3002\u91cf\u4ea7\u65f6\u8fd8\u53ef\u80fd\u56e0\u4e3a\u6750\u6599\u6216\u6e29\u5ea6\u53d8\u5316\u91cd\u65b0\u51fa\u73b0\u3002<\/p>\n<h2 id=\"5-v2-a\">\u4e8c\u5341\u4e5d\u3001\u4ece5 V\/2 A\u6539\u6210\u5176\u4ed6\u7535\u6d41\uff0c\u54ea\u4e9b\u53c2\u6570\u5fc5\u987b\u91cd\u7b97<\/h2>\n<h3 id=\"291\">29.1 \u4fdd\u6301\u7535\u611f\u4e0e\u9891\u7387\uff0c\u5cf0\u503c\u6309\u529f\u7387\u5e73\u65b9\u6839\u53d8\u5316<\/h3>\n<p class=\"formula\" style=\"padding:15px 18px;background:#edf4fc;border-left:4px solid #1769bb;overflow-x:auto;line-height:1.8\"><strong>I<sub>pk,new<\/sub>\/I<sub>pk,old<\/sub>\u2248\u221a(P<sub>cell,new<\/sub>\/P<sub>cell,old<\/sub>)<\/strong><\/p>\n<p>\u8f93\u51fa\u4ece 2 A \u6539\u5230 1 A\uff0c\u7406\u60f3\u5cf0\u503c\u53d8\u6210\u539f\u6765\u7684\u7ea6 0.707 \u500d\uff0c\u5bfc\u901a\u4e0e\u9000\u78c1\u4e5f\u968f\u4e4b\u51cf\u5c0f\u3002\u5982\u679c\u6539\u5230 3 A\uff0c\u5cf0\u503c\u7ea6\u589e\u52a0\u5230 1.225 \u500d\uff0cD+D2 \u4ece\u7ea6 0.8009 \u589e\u5230\u7ea6 0.9809\uff0c\u51e0\u4e4e\u5403\u6389\u5168\u90e8 DCM \u4f59\u91cf\u3002\u52a0\u4e0a\u516c\u5dee\u4e0e\u635f\u8017\u540e\u5c31\u53ef\u80fd\u8fdb\u5165 CCM\u3002<\/p>\n<p>\u6240\u4ee5\u4e3b\u7b97\u4f8b\u4e0d\u80fd\u7b80\u5355\u6362\u6210\u66f4\u5927\u4e8c\u6781\u7ba1\u5c31\u5ba3\u79f0\u80fd\u8f93\u51fa\u4e09\u5b89\u3002\u82e5\u5e0c\u671b\u5168\u8303\u56f4\u4ecd\u6709\u8db3\u591f DCM \u4f59\u91cf\uff0c\u5e94\u91cd\u65b0\u9009\u62e9\u7535\u611f\u3001\u9891\u7387\u3001\u53cd\u5c04\u7535\u538b\u4e0e\u531d\u6570\uff0c\u5e76\u6838\u5bf9\u78c1\u4ef6\u50a8\u80fd\u3001\u91c7\u6837\u3001\u6574\u6d41\u3001\u8f93\u51fa\u7535\u5bb9\u548c\u6563\u70ed\u3002<\/p>\n<h3 id=\"292\">29.2 \u6539\u53d8\u9891\u7387\u4e5f\u4e0d\u662f\u65e0\u4ee3\u4ef7<\/h3>\n<p>\u66f4\u9ad8\u9891\u7387\u53ef\u80fd\u51cf\u5c0f\u6bcf\u5468\u671f\u80fd\u91cf\u4e0e\u78c1\u4ef6\u5c3a\u5bf8\uff0c\u5374\u63d0\u9ad8\u5f00\u5173\u3001\u9a71\u52a8\u548c\u78c1\u82af\u635f\u8017\uff1b\u8f83\u4f4e\u9891\u7387\u51cf\u5c11\u90e8\u5206\u5f00\u5173\u635f\u8017\uff0c\u5374\u589e\u52a0\u6bcf\u5468\u671f\u50a8\u80fd\u4e0e\u78c1\u5bc6\u53d8\u5316\u3002\u63a7\u5236\u5668\u9891\u7387\u5bb9\u5dee\u548c\u6a21\u5f0f\u5207\u6362\u8981\u7eb3\u5165\u6700\u574f\u70b9\uff0c\u4e0d\u5b9c\u628a\u9891\u7387\u5f53\u4f5c\u65e0\u9650\u53ef\u8c03\u65cb\u94ae\u3002<\/p>\n<p>\u56fa\u5b9a L \u4e0e\u529f\u7387\u65f6\uff0cDCM \u5cf0\u503c\u968f 1\/\u221afs \u53d8\u5316\uff0c\u4f46 D+D2 \u968f \u221afs \u53d8\u5316\u3002\u56e0\u6b64\u63d0\u9ad8\u9891\u7387\u5e76\u4e0d\u81ea\u52a8\u589e\u52a0\u540c\u4e00\u78c1\u4ef6\u7684 DCM \u65f6\u95f4\u4f59\u91cf\u3002\u8fd9\u4e2a\u5173\u7cfb\u5bb9\u6613\u88ab\u201c\u6bcf\u5468\u671f\u80fd\u91cf\u66f4\u5c0f\u201d\u5355\u65b9\u9762\u76f4\u89c9\u63a9\u76d6\u3002<\/p>\n<h3 id=\"293\">29.3 \u6539\u8f93\u51fa\u7535\u538b\u66f4\u8981\u91cd\u67e5\u531d\u6bd4<\/h3>\n<p>\u8f93\u51fa\u4ece\u4e94\u4f0f\u6539\u6210\u5341\u4e8c\u4f0f\uff0c\u6574\u6d41\u538b\u964d\u5360\u6bd4\u51cf\u5c0f\uff0c\u4f46\u6b21\u7ea7\u531d\u6570\u3001\u53cd\u5c04\u7535\u538b\u3001\u5668\u4ef6\u8010\u538b\u3001\u8f85\u52a9\u4f9b\u7535\u548c\u53cd\u9988\u5206\u538b\u90fd\u6539\u53d8\u3002\u4e0d\u80fd\u53ea\u6362 TL431 \u4e0a\u81c2\u7535\u963b\u3002\u8f93\u51fa\u7535\u5bb9\u989d\u5b9a\u7535\u538b\u3001\u4f4e\u538b\u8d1f\u8f7d\u4e0e\u4fdd\u62a4\u9608\u503c\u4e5f\u8981\u66f4\u65b0\u3002<\/p>\n<h3 id=\"294\">29.4 \u76f4\u63a5\u79fb\u690d\u53d8\u538b\u5668\u7684\u98ce\u9669<\/h3>\n<p>\u4e00\u53ea\u4ece\u65e7\u9002\u914d\u5668\u62c6\u51fa\u7684\u78c1\u4ef6\uff0c\u53ef\u80fd\u6709\u4e0d\u540c AL\u3001\u6c14\u9699\u3001\u6750\u6599\u3001\u7edd\u7f18\u3001\u7ed5\u5411\u548c\u8f85\u52a9\u531d\u6570\u3002\u5373\u4f7f\u5916\u89c2\u76f8\u540c\u3001\u7a7a\u8f7d\u531d\u6bd4\u63a5\u8fd1\uff0c\u4e5f\u4e0d\u8bf4\u660e\u80fd\u5728\u5f53\u524d\u9891\u7387\u4e0e\u529f\u7387\u4e0b\u4f7f\u7528\u3002\u81f3\u5c11\u6d4b\u91cf\u53c2\u6570\u5e76\u786e\u8ba4\u6750\u6599\u4e0e\u7edd\u7f18\u7528\u9014\uff1b\u4e0d\u77e5\u9053\u5176\u5b89\u5168\u9694\u79bb\u89c4\u683c\u65f6\uff0c\u4e0d\u5e94\u5f53\u4f5c\u5df2\u7ecf\u5408\u683c\u7684\u5e02\u7535\u9694\u79bb\u4ef6\u3002<\/p>\n<h2 id=\"_17\">\u4e09\u5341\u3001\u8bbe\u8ba1\u4ea4\u4ed8\u8868\uff1a\u628a\u516c\u5f0f\u7ed3\u679c\u53d8\u6210\u53ef\u590d\u73b0\u89c4\u683c<\/h2>\n<h3 id=\"301\">30.1 \u4e3b\u7b97\u4f8b\u53c2\u6570\u6c47\u603b<\/h3>\n<div style=\"overflow-x:auto;margin:20px 0\">\n<table style=\"width:100%;border-collapse:collapse;font-size:0.94em\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u53c2\u6570<\/th>\n<th style=\"text-align: right;\">\u521d\u6b65\u7ed3\u679c<\/th>\n<th style=\"border:1px solid #d4dce6;padding:10px;text-align:left;background:#eef4f9\">\u72b6\u6001<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4ea4\u6d41\u8f93\u5165\u8303\u56f4<\/td>\n<td style=\"text-align: right;\">198\uff5e242 V AC\u300150 Hz<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">220 V \u00b110%\u7684\u4f8b\u503c<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8bbe\u8ba1\u6bcd\u7ebf\u8303\u56f4<\/td>\n<td style=\"text-align: right;\">230\uff5e\u7ea6342 V DC<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8c37\u503c\u4e0e\u77ac\u6001\u5f85\u5b9e\u6d4b<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa<\/td>\n<td style=\"text-align: right;\">5 V\/2 A\u300110 W<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6559\u5b66\u7535\u6d41\u5047\u8bbe<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">fs\u3001Lm<\/td>\n<td style=\"text-align: right;\">100 kHz\u30011.00 mH<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u9700\u7ed9\u516c\u5dee\u4e0e\u6d4b\u8bd5\u6761\u4ef6<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Np\u3001Ns\u3001Na<\/td>\n<td style=\"text-align: right;\">100\u30017\u300120T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5f15\u811a\u4e0e\u6781\u6027\u56fa\u5b9a<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">VR<\/td>\n<td style=\"text-align: right;\">\u7ea678.57 V<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5305\u542b0.5 V\u6574\u6d41\u5047\u8bbe<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6b63\u5e38Ipk<\/td>\n<td style=\"text-align: right;\">\u7ea60.469 A<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u975e\u4fdd\u62a4\u6781\u9650<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4f4e\u6bcd\u7ebfton\/tdemag<\/td>\n<td style=\"text-align: right;\">\u7ea62.039\/5.970 \u03bcs<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">DCM\u65f6\u95f4\u4f59\u91cf\u7ea61.991 \u03bcs<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4f4e\u6bcd\u7ebf\u521d\u7ea7RMS<\/td>\n<td style=\"text-align: right;\">\u7ea60.1223 A<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7ed5\u7ec4\u4e0e\u4e3b\u5f00\u5173\u521d\u7b97<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6b21\u7ea7\u5cf0\u503c\/RMS<\/td>\n<td style=\"text-align: right;\">\u7ea66.701\/2.989 A<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa\u5e73\u57472 A<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8f93\u51fa\u7535\u5bb9RMS<\/td>\n<td style=\"text-align: right;\">\u7ea62.221 A<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7535\u5bb9\u7ec4\u7eb9\u6ce2\u80fd\u529b<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">Ae\/Amin<\/td>\n<td style=\"text-align: right;\">30\/27 mm\u00b2<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5047\u8bbe\uff0c\u987b\u6838\u5bf9\u78c1\u82af<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u0394B\u5e73\u5747\/\u5c40\u90e8<\/td>\n<td style=\"text-align: right;\">\u7ea60.156\/0.174 T<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u8fd8\u9700\u9ad8\u6e29\u53ca\u5f02\u5e38\u68c0\u67e5<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">AL\u76ee\u6807\/\u7b49\u6548\u603b\u6c14\u9699<\/td>\n<td style=\"text-align: right;\">100 nH\/\u531d\u00b2\u3001\u7ea60.377 mm<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6c14\u9699\u8fd1\u4f3c\u503c\uff0c\u975e\u78e8\u5236\u56fe<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">MOSFET\u7406\u60f3\u5e73\u53f0<\/td>\n<td style=\"text-align: right;\">\u6700\u9ad8\u7ea6421 V<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4e0d\u542b\u6f0f\u611f\u5c16\u5cf0<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u6b21\u7ea7\u7406\u60f3\u53cd\u538b<\/td>\n<td style=\"text-align: right;\">\u6700\u9ad8\u7ea629 V<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u4e0d\u542b\u632f\u94c3<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">RCD\u521d\u503c<\/td>\n<td style=\"text-align: right;\">\u7ea639 k\u03a9\u30013.3 nF<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">VK\u2248140 V\uff0c\u4f9d\u8d56\u6f0f\u611f<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">RCD\u529f\u8017<\/td>\n<td style=\"text-align: right;\">\u7ea60.501 W<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u5fc5\u987b\u56de\u5230\u6548\u7387\u9884\u7b97<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u50a8\u80fd\u7535\u5bb9\u5019\u9009<\/td>\n<td style=\"text-align: right;\">22 \u03bcF\u3001\u9ad8\u538b\u7b49\u7ea7\u5f85\u5b9a<\/td>\n<td style=\"border:1px solid #d4dce6;padding:10px;text-align:left\">\u7535\u538b\u3001\u7eb9\u6ce2\u4e0e\u5bff\u547d\u6838\u5bf9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 id=\"302\">30.2 \u5de5\u827a\u5361\u81f3\u5c11\u5305\u542b\u4ec0\u4e48<\/h3>\n<p>\u78c1\u82af\u4e0e\u9aa8\u67b6\u5b8c\u6574\u6599\u53f7\u3001\u6750\u6599\u3001AL \u516c\u5dee\u3001\u6c14\u9699\u65b9\u5f0f\u3001\u89c2\u5bdf\u65b9\u5411\u3001\u5f15\u811a\u7f16\u53f7\u3001\u540c\u540d\u7aef\u3001\u6bcf\u7ec4\u531d\u6570\u3001\u6bcf\u5c42\u6392\u7ebf\u3001\u88f8\u94dc\u5f84\u4e0e\u7ebf\u578b\u3001\u7edd\u7f18\u6700\u5927\u5916\u5f84\u3001\u5e76\u80a1\u6570\u3001\u80f6\u5e26\u4e0e\u5957\u7ba1\u578b\u53f7\u3001\u8fb9\u7f18\u7ed3\u6784\u3001\u5916\u5305\u3001\u88c5\u82af\u56fa\u5b9a\u65b9\u5f0f\u548c\u68c0\u6d4b\u6761\u4ef6\uff0c\u90fd\u5e94\u5199\u6e05\u3002<\/p>\n<p>\u53d8\u538b\u5668\u89c4\u683c\u4e0d\u5e94\u53ea\u6709\u7535\u611f\u4e0e\u531d\u6bd4\u3002\u7edd\u7f18\u4f53\u7cfb\u548c\u751f\u4ea7\u4e00\u81f4\u6027\u662f\u7535\u6e90\u7684\u4e00\u90e8\u5206\uff0c\u6f0f\u611f\u3001DCR\u3001\u5bc4\u751f\u7535\u5bb9\u548c\u6e29\u5347\u4e5f\u4f1a\u5f71\u54cd\u6574\u673a\u3002\u6837\u54c1\u901a\u8fc7\u540e\u9700\u8981\u5c06\u5b9e\u9645\u4fee\u6539\u56de\u5199\u6587\u4ef6\uff0c\u51bb\u7ed3\u53ef\u91cd\u590d\u7684\u7248\u672c\u3002<\/p>\n<h3 id=\"303\">30.3 \u6d4b\u8bd5\u62a5\u544a\u81f3\u5c11\u5305\u542b\u4ec0\u4e48<\/h3>\n<p>\u8f93\u5165\u8303\u56f4\u3001\u8d1f\u8f7d\u70b9\u3001\u73af\u5883\u3001\u4eea\u5668\u3001\u529f\u7387\u4e0e\u6548\u7387\u3001\u542f\u52a8\u3001VCC\u3001\u9650\u6d41\u3001\u6700\u9ad8\u5f00\u5173\u7535\u538b\u3001\u6b21\u7ea7\u53cd\u538b\u3001\u8f93\u51fa\u7eb9\u6ce2\u3001\u9636\u8dc3\u3001\u77ed\u8def\u6062\u590d\u3001\u70ed\u70b9\u548c EMI \u7ed3\u679c\u3002\u6bcf\u4e00\u9879\u90fd\u6709\u6761\u4ef6\u4e0e\u9650\u503c\uff0c\u907f\u514d\u53ea\u6709\u7167\u7247\u6ca1\u6709\u89e3\u91ca\u3002<\/p>\n<p>\u516c\u5f0f\u8d1f\u8d23\u7ed9\u65b9\u5411\uff0c\u5b9e\u7269\u8d1f\u8d23\u68c0\u9a8c\u5047\u8bbe\u3002\u8ba1\u7b97\u4e0d\u81ea\u6d3d\u65f6\u5148\u4fee\u6a21\u578b\uff0c\u6ce2\u5f62\u4e0d\u5339\u914d\u65f6\u5148\u786e\u8ba4\u6d4b\u91cf\u4e0e\u63a7\u5236\uff0c\u70ed\u9884\u7b97\u4e0d\u8db3\u65f6\u518d\u4f18\u5316\u78c1\u4ef6\u548c\u5668\u4ef6\u3002\u8fd9\u6837\u6bcf\u6b21\u4fee\u6539\u90fd\u80fd\u89e3\u91ca\u539f\u56e0\uff0c\u800c\u4e0d\u662f\u53cd\u590d\u51ed\u7ecf\u9a8c\u8bd5\u96f6\u4ef6\u3002<\/p>\n<h2 id=\"_18\">\u4e09\u5341\u4e00\u3001\u7ec3\u4e60\u4e0e\u7b54\u6848\uff1a\u68c0\u67e5\u662f\u5426\u771f\u6b63\u7406\u89e3\u53cd\u6fc0<\/h2>\n<h3 id=\"_19\">\u7ec3\u4e60\u4e00\uff1a\u4ea4\u6d41\u4e0e\u76f4\u6d41<\/h3>\n<p>220 V AC \u7406\u60f3\u6574\u6d41\u6ce2\u5cf0\u662f\u591a\u5c11\uff1f\u7b54\u6848\u7ea6 311 V\u3002\u4e3a\u4ec0\u4e48\u8bbe\u8ba1\u6700\u4f4e\u6bcd\u7ebf\u4e0d\u80fd\u76f4\u63a5\u53d6 311 V\uff1f\u56e0\u4e3a\u9700\u8981\u8003\u8651\u6700\u4f4e\u4ea4\u6d41\u8f93\u5165\u3001\u6865\u5806\u538b\u964d\u3001\u50a8\u80fd\u7535\u5bb9\u653e\u7535\u3001\u5bb9\u5dee\u548c\u8dcc\u843d\u3002<\/p>\n<h3 id=\"_20\">\u7ec3\u4e60\u4e8c\uff1a\u531d\u6bd4\u548c\u53cd\u538b<\/h3>\n<p>Np=100\u3001Ns=7\u3001Vo=5 V\u3001VF=0.5 V\uff0cVR\u662f\u591a\u5c11\uff1f\u7b54\u6848\u7ea678.57 V\u3002\u82e5\u6bcd\u7ebf342 V\uff0c\u4e8c\u6781\u7ba1\u7406\u60f3\u53cd\u538b\u7ea6\u4e3a5+342\u00d77\/100=28.94 V\uff0c\u4e0d\u662f342 V\uff0c\u4e5f\u4e0d\u662f\u4ec5\u67095 V\u3002<\/p>\n<h3 id=\"dcm_1\">\u7ec3\u4e60\u4e09\uff1aDCM \u80fd\u91cf<\/h3>\n<p>1 mH \u5728\u5cf0\u503c0.469 A\u65f6\u50a8\u80fd\u7ea6\u591a\u5c11\uff1f\u7b54\u6848\u7ea6110 \u03bcJ\uff1b100 kHz\u65f6\u7406\u60f3\u9001\u80fd\u7ea611 W\u3002\u5982\u679c\u8c37\u503c\u53d8\u62100.2 A\uff0c\u8fd8\u80fd\u7528\u540c\u4e00\u516c\u5f0f\u5f53\u6bcf\u5468\u671f\u8f93\u51fa\u80fd\u91cf\u5417\uff1f\u4e0d\u80fd\uff0c\u5e94\u51cf\u53bb\u8c37\u503c\u50a8\u80fd\u3002<\/p>\n<h3 id=\"_21\">\u7ec3\u4e60\u56db\uff1a\u5cf0\u503c\u4e0e\u5e73\u5747\u7535\u6d41<\/h3>\n<p>\u6b21\u7ea7\u5cf0\u503c6.701 A\u3001\u9001\u80fd\u5360\u6bd40.597\u65f6\uff0c\u4e09\u89d2\u5e73\u5747\u7535\u6d41\u7ea6\u591a\u5c11\uff1f\u7b54\u6848\u7ea62 A\u3002\u75282 A\u76f4\u63a5\u9009\u6b21\u7ea7\u7ebf\u5f84\u4e3a\u4ec0\u4e48\u53ef\u80fd\u4e0d\u5408\u9002\uff1f\u56e0\u4e3a\u5468\u671fRMS\u7ea62.989 A\uff0c\u8fd8\u8981\u68c0\u67e5\u4ea4\u6d41\u635f\u8017\u548c\u5cf0\u503c\u3002<\/p>\n<h3 id=\"_22\">\u7ec3\u4e60\u4e94\uff1a\u6c14\u9699<\/h3>\n<p>\u76f8\u540cVin\u3001ton\u3001Np\u4e0eAe\uff0c\u589e\u5927\u6c14\u9699\u80fd\u964d\u4f4e\u0394B\u5417\uff1f\u7b54\u6848\u4e0d\u80fd\u3002\u4f0f\u79d2\u51b3\u5b9a\u0394B\uff1b\u6c14\u9699\u6539\u53d8Lm\u548c\u7535\u6d41\u4e0e\u78c1\u5bc6\u7684\u5173\u7cfb\uff0c\u4e0d\u4ee3\u66ff\u8109\u5bbd\u53ca\u531d\u6570\u63a7\u5236\u3002<\/p>\n<h3 id=\"rcd_1\">\u7ec3\u4e60\u516d\uff1aRCD\u53c2\u8003\u70b9<\/h3>\n<p>\u6bcd\u7ebf342 V\u3001VK=140 V\u65f6\uff0c\u6f0f\u6781\u94b3\u4f4d\u91cf\u7ea7\u662f\u591a\u5c11\uff1f\u7b54\u6848\u7ea6482 V\uff0c\u518d\u52a0\u7eb9\u6ce2\u3001\u4e8c\u6781\u7ba1\u548c\u5e03\u5c40\u52a8\u6001\u3002VK\u4e0d\u662f\u6f0f\u6781\u76f8\u5bf9\u70ed\u5730\u7684\u603b\u7535\u538b\u3002<\/p>\n<h3 id=\"_23\">\u7ec3\u4e60\u4e03\uff1a\u4e09\u660e\u6cbb\u8fde\u63a5<\/h3>\n<p>P1=50T\u3001P2=50T\u4e32\u8054\u52a9\u78c1\uff0c\u603b\u521d\u7ea7\u591a\u5c11\uff1f\u7b54\u6848100T\uff1b\u4e24\u6bb5\u6d41\u8fc7\u76f8\u540c\u7535\u6d41\u3002\u82e5\u9519\u8bef\u53cd\u63a5\uff0c\u7535\u538b\u548c\u78c1\u52bf\u53ef\u80fd\u62b5\u6d88\uff0c\u4e0d\u80fd\u4e0a\u7535\u901a\u8fc7\u589e\u5927\u5cf0\u503c\u4fee\u590d\u3002<\/p>\n<h3 id=\"_24\">\u7ec3\u4e60\u516b\uff1a\u6548\u7387\u9884\u7b97<\/h3>\n<p>\u4e94\u4f0f\u4e24\u5b89\u8f93\u51fa\u3001\u76ee\u6807\u6548\u738785%\uff0c\u603b\u635f\u8017\u9884\u7b97\u7ea6\u591a\u5c11\uff1f\u7b54\u68481.765 W\u3002\u5982\u679c\u6574\u6d411 W\u3001RCD0.501 W\uff0c\u5176\u4f59\u4ec5\u7ea60.264 W\u3002\u5e94\u91cd\u65b0\u6838\u5bf9\u635f\u8017\u5e76\u8fed\u4ee3\uff0c\u800c\u4e0d\u662f\u5ba3\u79f0\u76ee\u6807\u5df2\u8fbe\u6210\u3002<\/p>\n<h2 id=\"_25\">\u53c2\u8003\u8d44\u6599\u4e0e\u9605\u8bfb\u65b9\u5f0f<\/h2>\n<p>\u672c\u6587\u516c\u5f0f\u4e3b\u8981\u4ece\u7535\u611f\u5b9a\u5f8b\u3001\u4f0f\u79d2\u5e73\u8861\u3001\u7535\u8377\u5e73\u8861\u548c\u80fd\u91cf\u5b88\u6052\u9010\u6b65\u63a8\u5bfc\uff0c\u4e24\u4e2a\u7b97\u4f8b\u4e3a\u539f\u521b\u6559\u5b66\u8ba1\u7b97\u3002\u4ee5\u4e0b\u5b98\u65b9\u8d44\u6599\u7528\u4e8e\u8fdb\u4e00\u6b65\u6838\u5bf9\u5177\u4f53\u5668\u4ef6\u6a21\u578b\u548c\u8bbe\u8ba1\u8fb9\u754c\uff1b\u4e0d\u8981\u5c06\u4e0d\u540c\u8d44\u6599\u7684\u531d\u6bd4\u65b9\u5411\u3001\u53c2\u8003\u4fa7\u548c\u94b3\u4f4d\u5b9a\u4e49\u6df7\u7528\u3002<\/p>\n<ol>\n<li><a href=\"https:\/\/www.ti.com\/lit\/ta\/ssztcw6\/ssztcw6.pdf\">TI\uff1aDesigning a DCM Flyback Converter<\/a>\uff1a\u5bf9\u7167DCM\u7684\u7535\u6d41\u3001\u9001\u80fd\u4e0e\u9000\u78c1\u8bbe\u8ba1\u6d41\u7a0b\u3002<\/li>\n<li><a href=\"https:\/\/www.ti.com\/lit\/ml\/slup127\/slup127.pdf\">TI\uff1aInductor and Flyback Transformer Design\uff0cSLUP127<\/a>\uff1a\u50a8\u80fd\u78c1\u4ef6\u3001\u6c14\u9699\u3001\u78c1\u82af\u4e0e\u7ed5\u7ec4\u635f\u8017\u3002<\/li>\n<li><a href=\"https:\/\/www.ti.com\/lit\/ds\/symlink\/ucc28c43.pdf\">TI\uff1aUCCx8C4x Current-Mode PWM Controller \u6570\u636e\u624b\u518c<\/a>\uff1a\u5668\u4ef6\u7ea7\u542f\u52a8\u3001\u91c7\u6837\u3001\u8865\u507f\u3001RHP\u96f6\u70b9\u4e0e\u5e94\u7528\u8ba1\u7b97\u793a\u4f8b\uff1b\u672c\u6587\u5e76\u672a\u6307\u5b9a\u8fd9\u9897\u82af\u7247\u4e3a\u6700\u7ec8BOM\u3002<\/li>\n<li><a href=\"https:\/\/www.ti.com\/lit\/ds\/symlink\/tl431.pdf\">TI\uff1aTL431\/TL432 \u6570\u636e\u624b\u518c<\/a>\uff1a\u53c2\u8003\u7cbe\u5ea6\u3001\u5de5\u4f5c\u7535\u6d41\u3001\u5f15\u811a\u4e0e\u7a33\u5b9a\u6027\u8303\u56f4\u3002<\/li>\n<li><a href=\"https:\/\/www.analog.com\/en\/resources\/technical-articles\/how-to-design-a-noopto-flyback-converter-with-secondaryside-synchronous-rectification.html\">Analog Devices\uff1aFlyback Converter with Secondary-Side Synchronous Rectification<\/a>\uff1a\u540c\u6b65\u6574\u6d41\u3001RCD\u4e0eRC\u5438\u6536\u7684\u5668\u4ef6\u8bbe\u8ba1\u8bf4\u660e\u3002<\/li>\n<li><a href=\"https:\/\/www.ti.com\/lit\/ml\/slup197\/slup197.pdf\">TI\uff1aEddy Current Losses in Transformer Windings\uff0cSLUP197<\/a>\uff1a\u8d8b\u80a4\u3001\u90bb\u8fd1\u6548\u5e94\u3001\u5bfc\u4f53\u5c42\u6b21\u4e0e\u7ed5\u7ec4\u4ea4\u6d41\u635f\u8017\u3002<\/li>\n<li><a href=\"https:\/\/www.tdk-electronics.tdk.com\/download\/187036\/dbcde584d155cc270f5d5dbf1efec233\/pdf-generaldefinitions.pdf\">TDK\uff1aFerrite Cores General Definitions<\/a>\uff1aAe\u3001Amin\u3001Ve\u4e0eAL\u7b49\u53c2\u6570\u5b9a\u4e49\u3002<\/li>\n<\/ol>\n<p>\u52a8\u624b\u65f6\u5efa\u8bae\u5148\u7528\u5df2\u7ecf\u9a8c\u8bc1\u7684\u9694\u79bb\u4f4e\u538b\u5e73\u53f0\u5b66\u4e60\u6ce2\u5f62\u4e0e\u7ed5\u7ec4\u6781\u6027\uff0c\u518d\u7531\u5177\u5907\u76f8\u5e94\u6761\u4ef6\u7684\u4eba\u5b8c\u6210\u5e02\u7535\u6837\u673a\u3002\u672c\u6587\u7684\u76ee\u6807\u662f\u8ba9\u8bfb\u8005\u77e5\u9053\u6bcf\u4e2a\u53c2\u6570\u4e3a\u4f55\u5b58\u5728\u3001\u8ba1\u7b97\u5982\u4f55\u5173\u8054\u4ee5\u53ca\u6d4b\u91cf\u5982\u4f55\u9a8c\u8bc1\uff0c\u800c\u4e0d\u662f\u628a\u4e00\u5f20\u5047\u8bbe\u78c1\u82af\u548c\u63a7\u5236\u5668\u7684\u6559\u5b66\u8868\u8bef\u5f53\u6210\u65e0\u9700\u9a8c\u8bc1\u7684\u6210\u54c1\u8bbe\u8ba1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9762\u5411\u521d\u5b66\u8005\u7684\u53cd\u6fc0\u7535\u6e90\u5b8c\u6574\u6559\u7a0b\uff0c\u4ee5220V\u4ea4\u6d41\u8f93\u5165\u30015V\/2A\u9694\u79bb\u8f93\u51fa\u4e3a\u4e3b\u7b97\u4f8b\uff0c\u9010\u6b65\u8bb2\u89e3\u62d3\u6251\u3001DCM\/CCM\u3001\u6574\u6d41\u6bcd\u7ebf\u3001\u78c1\u4ef6\u4e0e\u4e09\u660e\u6cbb\u7ed5\u6cd5\u3001RCD\u94b3\u4f4d\u3001\u5668\u4ef6\u3001\u7535\u5bb9\u3001\u53cd\u9988\u3001\u542f\u52a8\u3001\u4fdd\u62a4\u548c\u8c03\u8bd5\u3002<\/p>\n","protected":false},"author":2,"featured_media":151,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[54,53,51,50,42,24,52,41],"class_list":["post-150","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-study","tag-ccm","tag-dcm","tag-51","tag-50","tag-42","tag-24","tag-52","tag-41"],"_links":{"self":[{"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/posts\/150","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/comments?post=150"}],"version-history":[{"count":1,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/posts\/150\/revisions"}],"predecessor-version":[{"id":167,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/posts\/150\/revisions\/167"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/media\/151"}],"wp:attachment":[{"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/media?parent=150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/categories?post=150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oldhamburger.cn\/index.php\/wp-json\/wp\/v2\/tags?post=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}