{"id":1419,"date":"2026-02-23T09:10:25","date_gmt":"2026-02-23T01:10:25","guid":{"rendered":"https:\/\/www.640629.xyz\/?p=1419"},"modified":"2026-02-23T15:11:04","modified_gmt":"2026-02-23T07:11:04","slug":"irf540n-n-ch-mosfet%e7%89%b9%e6%80%a7%e6%9b%b2%e7%b7%9a%e6%b8%ac%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.640629.xyz\/?p=1419","title":{"rendered":"IRF540N N-ch MOSFET \u7c21\u4ecb\u3001\u63a5\u8173\u6975\u6027\u8207\u7279\u6027\u66f2\u7dda\u6e2c\u91cf"},"content":{"rendered":"\n<p>\u4e00\u3001\u57fa\u672c\u7279\u6027\u8207\u63a5\u8173\u6975\u6027\u6e2c\u91cf<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d8b7939f750.png\" alt=\"\"\/><figcaption class=\"wp-element-caption\">IRF540N\u63a5\u8173\u5716<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d8b7943b124.png\" alt=\"\"\/><figcaption class=\"wp-element-caption\">IRF540N\u96fb\u8def\u7b26\u865f<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>\u57fa\u790e\u77e5\u8b58\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Gate \u70ba\u4e8c\u6c27\u5316\u77fd\u7d55\u7de3\uff0cR<sub>i <\/sub>\u2192 \u221e \u3002<\/li>\n\n\n\n<li>Source \u5230 Drain \u4e4b\u9593\u5b58\u5728\u5bc4\u751f\u4e8c\u6975\u9ad4\u3002<\/li>\n\n\n\n<li>Gate \u5230 Source \u4e4b\u9593\u5b58\u5728\u5bc4\u751f\u96fb\u5bb9 C<sub>gs <\/sub>\u3002<\/li>\n\n\n\n<li>V<sub>GS<\/sub> \u63a5\u6b63\u96fb\u58d3\uff0c\u7576 V<sub>GS<\/sub> \u5920\u5927\u6642\uff0cDrain\u548cSource\u4e4b\u9593\u611f\u61c9\u5f62\u6210\u901a\u9053\uff0cI<sub>D<\/sub> \u96fb\u6d41\u53ef\u6d41\u904e\u6b64\u901a\u9053\u3002<\/li>\n\n\n\n<li>\u5728\u7dda\u6027\u5340\u6642\uff0c I<sub>D<\/sub> \u96fb\u6d41\u8207 V<sub>DS<\/sub> \u96fb\u58d3\u6210\u6b63\u6bd4\u3002<\/li>\n\n\n\n<li>\u5728\u98fd\u548c\u5340\u6642\uff0c I<sub>D<\/sub> \u96fb\u6d41\u8207 V<sub>DS<\/sub> \u96fb\u58d3\u7121\u95dc\uff0c\u7531 V<sub>GS<\/sub> \u76f4\u63a5\u63a7\u5236\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u6e2c\u91cf\u8aaa\u660e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6307\u91dd\u5f0f\u96fb\u8868\u7f6e\u65bc R x 1k \u03a9 \u6a94\u3002<\/li>\n\n\n\n<li>\u4e09\u500b\u63a5\u8173\u77ed\u8def\u653e\u96fb\u3002<\/li>\n\n\n\n<li>\u627e\u51fa Gate\uff1a<br>(1) Gate \u548c Source \u4e0d\u901a ( \u2235 R<sub>i <\/sub>\u2192 \u221e )<br>(2) Gate \u548c Drain \u4e0d\u901a ( \u2235 R<sub>i <\/sub>\u2192 \u221e )<\/li>\n\n\n\n<li>\u78ba\u8a8d Drain\uff1a\u8207\u6563\u71b1\u7247\u9023\u63a5\u5728\u4e00\u8d77\u3002<\/li>\n\n\n\n<li>\u78ba\u8a8d Source\uff1aSource \u5230 Drain \u55ae\u5411\u5c0e\u901a ( \u2235\u5bc4\u751f\u4e8c\u6975\u9ad4 )<\/li>\n\n\n\n<li>V<sub>GS<\/sub> \u6216 V<sub>GD<\/sub> \u63a5<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u6b63<\/mark><\/strong>\u96fb\u58d3\u6642\uff0c\u611f\u61c9\u5f62\u6210\u901a\u9053\uff0c\u5bc4\u751f\u96fb\u5bb9 C<sub>gs <\/sub>\u5132\u80fd\uff0cSource \u5230 Drain \u53ef\u7dad\u6301\u96d9\u5411\u5c0e\u901a\u3002<\/li>\n\n\n\n<li>V<sub>GS<\/sub> \u6216 V<sub>GD<\/sub> \u63a5<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u8ca0<\/mark><\/strong>\u96fb\u58d3\u6642\uff0c\u901a\u9053\u622a\u6b62\uff0cSource \u5230 Drain \u55ae\u5411\u5c0e\u901a\u3002<\/li>\n<\/ol>\n<\/div>\n<\/div>\n\n\n\n<p>\u4e8c\u3001V<sub>GS<\/sub> &#8211; I<sub>D<\/sub>\u7279\u6027\u66f2\u7dda<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d5181850a98.png\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>\u8aaa\u660e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7576 V<sub>GS<\/sub> \u5920\u5927\u6642\uff0cDrain\u548cSource\u4e4b\u9593\u611f\u61c9\u5f62\u6210\u901a\u9053\uff0cI<sub>D<\/sub> \u96fb\u6d41\u53ef\u6d41\u904e\u6b64\u901a\u9053\u3002<\/li>\n\n\n\n<li>\u611f\u61c9\u901a\u9053\u6240\u9700\u8981\u7684\u6700\u5c0f\u96fb\u58d3\u7a31\u70ba\u81e8\u754c\u96fb\u58d3(threshold voltage) V<sub>th<\/sub> \u3002<\/li>\n\n\n\n<li>\u901a\u9053\u6df1\u6dfa\u53ef\u7531 V<sub>GS<\/sub> \u8abf\u6574\uff0c V<sub>GS<\/sub> \u6108\u5927\uff0c I<sub>D<\/sub> \u6108\u5927\u3002<\/li>\n\n\n\n<li>\u5728\u98fd\u548c\u5340\u6642\uff0c<strong> I<sub>D<\/sub> = K ( V<sub>GS<\/sub> &#8211; V<sub>th<\/sub>)<sup>2<\/sup><\/strong><\/li>\n<\/ol>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d8caf78864e.png\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d51877438a8.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">\u81e8\u754c\u96fb\u58d3 V<sub>th<\/sub> \u5927\u7d04\u5728 3 ~ 3.6 V \u4e4b\u9593<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<p>\u4e09\u3001V<sub>DS<\/sub> &#8211; I<sub>D<\/sub>\u7279\u6027\u66f2\u7dda<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d518d37c44b.png\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<p><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>\u8aaa\u660e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8abf\u6574\u53ef\u8b8a\u96fb\u963b VR \uff0c\u53ef\u6539\u8b8a V<sub>GS<\/sub> \u503c\u3002<\/li>\n\n\n\n<li>\u4e0d\u540c\u7684 V<sub>GS<\/sub> \u503c\uff0c\u4ee3\u8868\u4e0d\u540c\u7684\u901a\u9053\u6df1\u6dfa\uff0c\u53ef\u6c7a\u5b9a\u4e0d\u540c\u7684 I<sub>D<\/sub> \u96fb\u6d41\u5927\u5c0f\u3002<\/li>\n\n\n\n<li>\u5728\u7dda\u6027\u5340\u6642\uff0c I<sub>D<\/sub> \u96fb\u6d41\u8207 V<sub>DS<\/sub> \u96fb\u58d3\u6210\u6b63\u6bd4\u3002<\/li>\n\n\n\n<li>\u5728\u98fd\u548c\u5340\u6642\uff0c I<sub>D<\/sub> \u96fb\u6d41\u8207 V<sub>DS<\/sub> \u96fb\u58d3\u7121\u95dc\uff0c\u7531 V<sub>GS<\/sub> \u76f4\u63a5\u63a7\u5236\u3002<\/li>\n\n\n\n<li>\u7531\u6e2c\u5f97\u7684 I<sub>D<\/sub> \u3001 V<sub>GS<\/sub> \u53ca\u4e0a\u8ff0\u7684 V<sub>th<\/sub> \uff0c\u53ef\u7372\u5f97<br><strong>K = I<sub>D<\/sub> \/ (V<sub>GS<\/sub> &#8211; V<sub>th<\/sub>) <sup>2<\/sup><\/strong><\/li>\n<\/ol>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d8cc0e32ff6.png\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d518fe8764e.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">V<sub>GS1<\/sub> = 4 V, I<sub>D1<\/sub> = 6.4 mA<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d51900b1915.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">V<sub>GS2<\/sub> = 5 V, I<sub>D2<\/sub> = 20 mA<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/img.640629.xyz\/i\/67d51902dd71d.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">V<sub>GS3<\/sub> = 6 V, I<sub>D3<\/sub> = 31.1 mA<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-embed aligncenter is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"NMOS IRF540N VDS-ID \u7279\u6027\u66f2\u7dda\u6e2c\u91cf\u7d50\u679c\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/w0_lMGRAAvw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u57fa\u672c\u7279\u6027\u8207\u63a5\u8173\u6975\u6027\u6e2c\u91cf \u57fa\u790e\u77e5\u8b58\uff1a \u6e2c\u91cf\u8aaa\u660e\uff1a \u4e8c\u3001VGS &#8211; ID\u7279\u6027\u66f2\u7dda \u8aaa\u660e\uff1a \u4e09\u3001VD<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-1419","post","type-post","status-publish","format-standard","hentry","category-electronics-practice"],"_links":{"self":[{"href":"https:\/\/www.640629.xyz\/index.php?rest_route=\/wp\/v2\/posts\/1419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.640629.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.640629.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.640629.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.640629.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1419"}],"version-history":[{"count":29,"href":"https:\/\/www.640629.xyz\/index.php?rest_route=\/wp\/v2\/posts\/1419\/revisions"}],"predecessor-version":[{"id":1477,"href":"https:\/\/www.640629.xyz\/index.php?rest_route=\/wp\/v2\/posts\/1419\/revisions\/1477"}],"wp:attachment":[{"href":"https:\/\/www.640629.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.640629.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.640629.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}