{"id":4415,"date":"2017-05-11T10:00:54","date_gmt":"2017-05-11T01:00:54","guid":{"rendered":"http:\/\/micro.rohm.com\/cn\/techweb\/?p=4415"},"modified":"2022-09-16T16:18:59","modified_gmt":"2022-09-16T08:18:59","slug":"%e7%bb%9d%e7%bc%98%e5%9e%8b%e5%8f%8d%e6%bf%80%e5%bc%8f%e8%bd%ac%e6%8d%a2%e5%99%a8%e7%94%b5%e8%b7%af%e8%ae%be%e8%ae%a1%ef%bc%9a%e4%b8%bb%e8%a6%81%e9%83%a8%e4%bb%b6%e7%9a%84%e9%80%89%e5%ae%9a%ef%bc%8dmo","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/acdc\/acdc_pwm\/acdc_pwm01\/1221","title":{"rendered":"\u7edd\u7f18\u578b\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u7535\u8def\u8bbe\u8ba1\uff1a\u4e3b\u8981\u90e8\u4ef6\u7684\u9009\u5b9a\uff0dMOSFET\u76f8\u5173(\u4e00)"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-1228 size-medium\" src=\"\/upload\/2017\/05\/8A_mosfet2-300x236.jpg\" alt=\"8A_mosfet\" width=\"300\" height=\"236\"><br \/>\n\u53d8\u538b\u5668\u7684\u8bbe\u8ba1\u7ed3\u675f\uff0c\u63a5\u4e0b\u6765\u662f\u5f00\u5173\u5143\u4ef6\uff0c\u672c\u8282\u8bf4\u660eMOSFET Q1\u7684\u9009\u5b9a\u548c\u76f8\u5173\u7535\u8def\u6784\u6210\u3002<\/p>\n<p>\u6700\u521d\uff0c\u6839\u636e\u5f00\u5173\u7535\u538b\u6216\u7535\u6d41\u7b49\u6765\u9009\u5b9aMOSFET Q1\u3002\u5bf9\u6b64\uff0c\u672c\u7a3f\u5c06\u8bf4\u660e\u201c\u4e3b\u8981\u90e8\u4ef6\u7684\u9009\u5b9a\uff0dMOSFET\u76f8\u5173 \u51761\u201d\u3002<\/p>\n<p>\u63a5\u7740\u51b3\u5b9a\u8c03\u6574MOSFET\u6805\u6781\u9a71\u52a8\u7684\u7535\u8def\u3001\u4e8c\u6781\u7ba1 D4\u3001\u7535\u963bR5\u3001R6\uff0c\u800c\u4e14\uff0c\u51b3\u5b9a\u9650\u6d41\u548c\u659c\u7387\u8865\u507f\u4e0a\u5fc5\u8981\u7684\u7535\u6d41\u68c0\u6d4b\u7535\u963bR8\u3002\u8fd9\u90e8\u5206\u5c06\u5728\u201c\u4e3b\u8981\u90e8\u4ef6\u7684\u9009\u5b9a\uff0dMOSFET\u76f8\u5173 \u51762\u201d\u4e2d\u8bf4\u660e\u3002<\/p>\n<p>\u5148\u8bf4\u660e\u6b64\u90e8\u5206\u7535\u8def\u5982\u4f55\u8bf4\u660e\u3002\u4ee5D4\u3001R5\u3001R6\u8c03\u6574\u4eceIC\u7684OUT\uff08PWM\u8f93\u51fa\uff09\u7aef\u8f93\u51fa\u7684\u4fe1\u53f7\uff0c\u8ba9MOSFET Q1\u80fd\u591f\u6b63\u786e\u5de5\u4f5c\uff0c\u7136\u540e\u518d\u9a71\u52a8MOSFET\u7684\u6805\u6781\u3002MOSFET Q1\u5f00\/\u5173\u7ecf\u8fc7\u6574\u6d41\u4e14\u6d41\u5411\u53d8\u538b\u5668 T1\u4e00\u6b21\u4fa7\u7684\u9ad8\u7535\u538b\uff0c\u5c06\u5176\u7535\u80fd\u4f20\u9001\u81f3\u4e8c\u6b21\u4fa7\u3002Q1\u5728ON\u65f6Ids\u6d41\u52a8\uff0c\u4f46\u56e0\u4e3a\u5e76\u975e\u65e0\u9650\u5236\u6d41\u52a8\uff0c\u662f\u6545\u5229\u7528R8\u68c0\u6d4b\u7535\u6d41\u5e76\u52a0\u4ee5\u9650\u5236\u3002\u8bf7\u53c2\u7167\u201c<a href=\"\/knowledge\/acdc\/acdc_pwm\/acdc_pwm01\/889\">\u7edd\u7f18\u578b\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u7535\u8def\u8bbe\u8ba1<\/a>\u201d\u9879\u4e2d\u7684\u6574\u4f53\u7535\u8def\u5185\u5bb9\u3002<\/p>\n<p><strong>MOSFET Q1\u7684\u9009\u5b9a<\/strong><\/p>\n<p>\u9996\u5148\uff0c\u8981\u5148\u7406\u89e3\u53ea\u6709\u7eb8\u4e0a\u8c08\u5175\u662f\u96be\u4ee5\u8fdb\u884cMOSFET\u7684\u9009\u5b9a\uff0c\u4f46\u4ecd\u7136\u5fc5\u987b\u4f9d\u8d56\u8fc7\u5f80\u7684\u7ecf\u9a8c\u6cd5\u5219\u3002\u800c\u4e14\uff0c\u6700\u540e\u5b9e\u673a\u786e\u8ba4\u5fc5\u987b\u964d\u989d\u81f3\u54ea\u4e2a\u7a0b\u5ea6\u540e\uff0c\u518d\u6765\u51b3\u5b9aMOSFET\u3002<\/p>\n<p>MOSFET\u7684\u9009\u5b9a\u65f6\uff0c\u57fa\u672c\u7684\u63a2\u8ba8\u4e8b\u9879\u6709\u4ee5\u4e0b\u51e0\u4e2a\u3002<\/p>\n<ul class=\"line-none\">\n<li>\u6700\u5927\u6f0f\u6781\uff0d\u6e90\u6781\u95f4\u7535\u538b\uff08Vds\uff09<\/li>\n<li>\u5cf0\u503c\u7535\u6d41<\/li>\n<li>\u5bfc\u901a\u7535\u963b\uff08Ron\uff09\u7684\u635f\u8017<\/li>\n<li>\u5c01\u88c5\u6700\u5927\u5bb9\u8bb8\u635f\u8017\uff08Pd\uff09<\/li>\n<\/ul>\n<p>\u672a\u66fe\u6709\u8fc7\u76f8\u5173\u7ecf\u9a8c\u6cd5\u5219\u65f6\uff0c\u5c06\u6ca1\u6709\u4efb\u4f55\u6839\u636e\u5e2e\u52a9\u81ea\u5df1\u505a\u51fa\u9009\u62e9\uff0c\u6b64\u65f6\u53ef\u4ee5\u8003\u8651Vds\u548cIds\u3002<\/p>\n<p>\u2460 Vds(max)<\/p>\n<p>\u53ef\u7ecf\u7531\u4e0b\u5217\u516c\u5f0f\u7b97\u8ba1Vds(max)\u3002<\/p>\n<p>Vds(max) = Vin(max)+VOR+Vspike<br \/>\n=264V\u00d71.41\uff0b(12V\uff0b1V)\u00d730\/6\uff0bVspike\uff1d437V\uff0bVspike*<\/p>\n<p>VOR\uff1aVO\uff1dVout\uff0bVF\u4e58\u4e0a\u53d8\u538b\u5668\u7684\u531d\u6570\u6bd4Np\uff1aNs\u53c2\u7167\u201c<a href=\"\/knowledge\/acdc\/acdc_pwm\/acdc_pwm01\/940\">\u53d8\u538b\u5668\u8bbe\u8ba1\uff08\u6570\u503c\u8ba1\u7b97\uff09<\/a>\u201d\u3002<br \/>\nVin(max\uff09\uff1a\u53ef\u652f\u6301\u6700\u5927AC\u7535\u538b\u5cf0\u503c\uff08264V\u00d7\u221a2\uff09<br \/>\nVspike\uff1a\u5cf0\u6ce2\u7535\u538b<br \/>\n*\u4e0d\u5bb9\u6613\u8ba1\u7b97Vspike\uff0c\u56e0\u6b64\u672c\u4f8b\u9898\u4e2d\uff0c\u5728\u589e\u52a0\u7f13\u51b2\u7535\u8def\u7684\u524d\u63d0\u4e0b\uff0c\u6839\u636e\u7ecf\u9a8c\u6cd5\u5219\u51b3\u5b9a\u4e3a400V\u3002<\/p>\n<p>\u2461 Ids<\/p>\n<p>Ids\u4ee5\u9009\u5b9aIppk\u00d72\u5de6\u53f3\u7684\u5143\u4ef6\u4e3a\u6807\u51c6\u3002\u6839\u636e\u201c\u53d8\u538b\u5668\u8bbe\u8ba1\uff08\u6570\u503c\u8ba1\u7b97\uff09\u201dIppk\uff1d2.32A<\/p>\n<p>Ids\uff1d2.32\u00d72\uff1d4.64A<\/p>\n<p>\u6839\u636e\u4e0a\u8ff0\u7ed3\u679c\uff0c\u9009\u5b9aVds(max)\u8fbe800V\u5de6\u53f3\u3001Ids\u8fbe5A\u5de6\u53f3\u7684MOSFET\u3002\u4f8b\u9898\u7684\u7535\u8def\u9009\u5b9a极悦娱乐\u7684R8005ANX\uff08800V\u30015A\uff09\u3002\u6b64\u5916\uff0c\u8be5MOSFET\u7684\u5bfc\u901a\u7535\u963b 1.6\u03a9\uff0c\u5c01\u88c5\u5219\u662fTO-220F\u3002<\/p>\n<p>\u518d\u6765\uff0c\u5b9e\u9645\u4f7f\u7528\u4e0a\u8ff0\u7684MOSFET\uff0c\u5728\u7535\u8def\u6d4b\u91cfVds\u3001Ids\u548c\u53d1\u70ed\u72b6\u51b5\uff0c\u786e\u8ba4\u964d\u989d\u8db3\u591f\u3002\u8f93\u5165\u7535\u538b\u4f4e\u65f6\uff0cMOSFET\u7684ON\u65f6\u95f4\u4f1a\u53d8\u957f\uff0c\u56e0\u5bfc\u901a\u7535\u963bRon\u635f\u8017\u53d1\u70ed\u589e\u5927\uff0c\u7279\u522b\u662f\u91c7\u7528\u56fd\u9645\u901a\u7528\u89c4\u683c\u8f93\u5165\uff08AC85V\uff5eAC264V\uff09\u65f6\u66f4\u662f\u5fc5\u987b\u591a\u52a0\u6ce8\u610f\u3002\u5fc5\u8981\u65f6\u52a0\u88c5\u6563\u70ed\u5668\u4f5c\u4e3a\u6563\u70ed\u5bf9\u7b56\u3002<\/p>\n<p>\u89c6MOSFET\u7684\u5382\u5546\u800c\u5b9a\uff0c\u63d0\u51fa\u635f\u8017\u7684\u6d4b\u91cf\u65b9\u6cd5\u6216\u8fdb\u884c\u786e\u8ba4\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u793a\u4f8b\u4ec5\u4f9b\u53c2\u8003\u3002<\/p>\n<p class=\"text-c\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1233 size-full\" src=\"\/upload\/2017\/05\/8A_MOSFET_loss.jpg\" alt=\"8A_MOSFET_loss\" width=\"540\" height=\"540\"><\/p>\n<p class=\"text-c\"><a href=\"https:\/\/www.wfjydl.com\/web\/china\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" src=\"\/upload\/2017\/05\/8A_hp_12.jpg\" alt=\"8A_hp_12\" width=\"700\" height=\"730\" class=\"size-full wp-image-1234\"><\/a><\/p>\n<p>\u4ece\u6458\u5f55\u7f51\u7ad9\u753b\u9762\u4e2d\u7684\u2460\u5f00\u59cb\uff0c\u64cd\u4f5c\u9f20\u6807\u4f9d\u5e8f\u70b9\u51fb\u540e\uff0c\u5c31\u53ef\u4ee5\u9605\u89c8\u8ba1\u7b97\u5143\u4ef6\u6e29\u5ea6\u548c\u5224\u5b9a\u80fd\u5426\u4f7f\u7528\u7684\u65b9\u6cd5\u3002\u5bf9\u4e8e\u5b9e\u673a\u64cd\u4f5c\u65f6\u7684\u786e\u8ba4\u4f5c\u4e1a\u5e94\u8be5\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p>\u56e0\u800c\uff0c\u6700\u7ec8\u9009\u5b9aMOSFET\u3002\u5230\u6b64\uff0c\u81f3\u4e8e\u6805\u6781\u9a71\u52a8\u8c03\u6574\u7535\u8def\u548c\u7535\u6d41\u68c0\u6d4b\u7535\u963b\u5c06\u5728\u201c\u4e3b\u8981\u90e8\u4ef6\u7684\u9009\u5b9a\uff0dMOSFET\u76f8\u5173 \u51762\u201d\u4e2d\u8bf4\u660e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u53d8\u538b\u5668\u7684\u8bbe\u8ba1\u7ed3\u675f\uff0c\u63a5\u4e0b\u6765\u662f\u5f00\u5173\u5143\u4ef6\uff0c\u672c\u8282\u8bf4\u660eMOSFET Q1\u7684\u9009\u5b9a\u548c\u76f8\u5173\u7535\u8def\u6784\u6210\u3002 \u6700\u521d\uff0c\u6839\u636e\u5f00\u5173\u7535\u538b\u6216\u7535\u6d41\u7b49\u6765\u9009\u5b9aMOSFET Q1\u3002\u5bf9\u6b64\uff0c\u672c\u7a3f\u5c06\u8bf4\u660e\u201c\u4e3b\u8981\u90e8\u4ef6\u7684\u9009\u5b9a\uff0dMOSFET\u76f8\u5173 \u51761\u201d\u3002 \u63a5\u7740\u51b3\u5b9a\u8c03\u6574MOSF [&hellip;]","protected":false},"author":1,"featured_media":20774,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[12],"tags":[175,302,303,304,305],"class_list":["post-4415","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-acdc_pwm01","tag-mosfet","tag-303","tag-304","tag-305"],"acf":[],"wps_subtitle":"","_links":{"self":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/4415","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/comments?post=4415"}],"version-history":[{"count":9,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/4415\/revisions"}],"predecessor-version":[{"id":20775,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/4415\/revisions\/20775"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media\/20774"}],"wp:attachment":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media?parent=4415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/categories?post=4415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/tags?post=4415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}