{"id":996,"date":"2018-09-17T09:43:49","date_gmt":"2018-09-17T09:43:49","guid":{"rendered":""},"modified":"2018-09-17T17:44:25","modified_gmt":"2018-09-17T09:44:25","slug":"%e6%8e%a2%e8%ae%a8%e5%8a%9f%e7%8e%87mosfet%e5%8f%98%e5%8c%96%e5%af%b9%e7%94%b5%e6%b5%81%e5%92%8c%e7%94%b5%e5%8e%8b%e5%9b%9e%e8%b7%af%e8%a1%8c%e4%b8%ba%e7%9a%84%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=996","title":{"rendered":"\u63a2\u8ba8\u529f\u7387MOSFET\u53d8\u5316\u5bf9\u7535\u6d41\u548c\u7535\u538b\u56de\u8def\u884c\u4e3a\u7684\u5f71\u54cd"},"content":{"rendered":"

\n\t1.1 \u7a33\u5b9a\u56de\u8def\u6bd4\u8f83:\u7535\u538b\u56de\u8def\u8c03\u8282\uff0c\u7535\u6d41\u56de\u8def\u9650\u5236\u3002<\/p>\n

\n\t\u672c\u7ae0\u8ba8\u8bba\u529f\u7387MOSFET<\/u>\u53d8\u5316\u5bf9\u4e24\u4e2a\u56de\u8def(\u7535\u6d41\u548c\u7535\u538b)\u884c\u4e3a\u7684\u5f71\u54cd\u3002\u7531\u4e8eMOSFET\u53ea\u5f71\u54cd\u529f\u7387\u5355\u5143\uff0c\u6240\u4ee5\u7406\u8bba\u7814\u7a76\u53ea\u9002\u7528\u4e8e\u529f\u7387\u5355\u5143\u6a21\u578b\u3002<\/p>\n

\n\t <\/div>\n

\n\t1.1.1 \u6a21\u5757\u56fe<\/p>\n

\n\t\u4e0b\u9762\u7684\u6846\u56fe\u8868\u793a\u7535\u5b50\u8c03\u8282\u56de\u8def\u7684\u7b49\u6548\u884c\u4e3a\u3002<\/p>\n

\n\t<\/p>\n

\n\t1.1.2 MOSFET\u53c2\u6570\u5bf9\u7535\u538b\u8c03\u8282\u56de\u8def\u7684\u5f71\u54cd<\/p>\n

\n\tØ \u7535\u538b\u63a7\u5236\u5de5\u4f5c\u6a21\u5f0f\u4e0b\u7684\u529f\u7387\u5355\u5143\u4f20\u9012\u529f\u80fd<\/p>\n

\n\t\u4ece\u786c\u4ef6\u6587\u6863(POWER MOSFETs\u7528\u6237\u6307\u5357)\u6211\u4eec\u6709\u4ee5\u4e0b\u6a21\u578b:<\/p>\n

\n\t<\/p>\n

\n\t“”\u7ebf\u6027\u9f13\u98ce\u673a\u5e94\u7528:<\/p>\n

\n\t- \u5bf9\u4e8e\u6240\u9009\u7535\u538b\u8c03\u8282\u7684\u975e\u5e38\u5c0f\u7684\u5e26\u5bbd(\u5927\u7ea6100Hz)\uff0c\u6781\u70b9\u7684\u4e8c\u9636\u9879\u548c\u96f6\u9879\u90fd\u662f\u53ef\u4ee5\u5ffd\u7565\u7684\u3002<\/p>\n

\n\t- \u56e0\u4e3ag\u3002Rs<\/u>h < < 1,\u9759\u6001\u589e\u76caAVo≈gR\u3002<\/p>\n

\n\t- \u6240\u4ee5\u4f20\u9012\u529f\u80fd\u770b\u8d77\u6765\u50cf\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u4e00\u9636\u6ee4\u6ce2\u5668<\/u>:<\/p>\n

\n\t<\/p>\n

\n\t\u5907\u6ce8:<\/p>\n

\n\t\u5b8c\u6574\u7684\u6f14\u793a\u53ef\u5728“\u7535\u529bmosfet\u7528\u6237\u6307\u5357”\u9644\u5f55\u3002<\/p>\n

\n\tØ \u7ed3\u8bba:<\/p>\n

\n\t\u7535\u538b\u63a7\u5236\u5de5\u4f5c\u6a21\u5f0f\u4e0b\u7684\u4f20\u9012\u529f\u80fd\u53d6\u51b3\u4e8e\u8de8\u5bfcg\u3001Cg\u3001Ce\u7535\u5bb9\u5668<\/u>\u548c\u8d1f\u8f7d\u3002\u56e0\u6b64\uff0c\u5fc5\u987b\u8bc4\u4f30\u65b0\u578bMOSFET\u5bf9\u7535\u538b\u56de\u8def\u7684\u5f71\u54cd\u3002<\/p>\n

\n\t1.1.3 MOSFET\u53c2\u6570\u5bf9\u7535\u6d41\u9650\u5236\u56de\u8def\u7684\u5f71\u54cd<\/p>\n

\n\tØ \u5728\u7535\u6d41\u63a7\u5236\u5de5\u4f5c\u6a21\u5f0f\u4e0b\u7684\u52a8\u529b\u5355\u5143\u4f20\u9012\u529f\u80fd<\/p>\n

\n\t\u4ece\u786c\u4ef6\u6587\u6863(POWER MOSFETs\u7528\u6237\u6307\u5357)\u6211\u4eec\u6709\u4ee5\u4e0b\u6a21\u578b:<\/p>\n

\n\t<\/p>\n

\n\t\u6211\u4eec\u8ba4\u4e3aCg+Ce\u548cGg*R*Cg\u76f8\u6bd4\u592a\u5c0f\u4e86:<\/p>\n

\n\t<\/p>\n

\n\t\u5907\u6ce8:<\/p>\n

\n\t\u5b8c\u6574\u7684\u6f14\u793a\u53ef\u5728“\u7535\u529bmosfet\u7528\u6237\u6307\u5357”\u9644\u5f55\u3002<\/p>\n

\n\tØ \u7ed3\u8bba<\/p>\n

\n\t\u7535\u538b\u63a7\u5236\u5de5\u4f5c\u6a21\u5f0f\u4e0b\u7684\u4f20\u9012\u529f\u80fd\u53d6\u51b3\u4e8e\u8de8\u5bfcg\u3001Cg\u3001Ce\u7535\u5bb9\u5668\u548c\u8d1f\u8f7d\u3002\u56e0\u6b64\uff0c\u5fc5\u987b\u8bc4\u4f30\u65b0\u7684MOSFET\u5bf9\u7535\u6d41\u5faa\u73af\u7684\u5f71\u54cd\u3002<\/p>\n

\n\t1.1.4 \u95ed\u73af\u7a33\u5b9a\u6027\u5206\u6790<\/p>\n

\n\t\u672c\u7814\u7a76\u7684\u76ee\u7684\u662f\u7528\u65b0\u7684MOSFET (IRF3305\u548c\u82f1\u98de\u51cc<\/u>IPP80N06S2-05)\u6765\u6f14\u793a\u4e24\u4e2a\u56de\u8def(\u7535\u673a\u7535\u538b\u548c\u7535\u673a\u7535\u6d41)\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n

\n\t\u539f\u7406:\u901a\u8fc7\u5728\u7a33\u5b9a\u5de5\u4f5c\u70b9\u5468\u56f4\u65bd\u52a0\u4e00\u4e2a\u5c0f\u6270\u52a8\uff0c\u6211\u4eec\u89c2\u5bdf\u7cfb\u7edf\u5982\u4f55\u53cd\u5e94\uff0c\u6ce8\u610f\u6bcf\u4e2a\u6270\u52a8\u9891\u7387\u7684\u589e\u76ca\u548c\u76f8\u4f4d\u503c\u3002\u8981\u63a2\u7d22\u7684\u9891\u7387\u503c\u4e00\u822c\u57284 - 50S\u7684\u8303\u56f4\u5185[10hz, 100Khz]\u3002<\/p>\n

\n\t\u901a\u8fc7\u5728bode\u56fe\u4e2d\u5e94\u7528Nyquist\u6807\u51c6\uff0c\u6211\u4eec\u8ba4\u4e3a\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u4fdd\u8bc1\u4e86(\u5305\u62ec\u6a21\u578b\u4e0a\u7684\u4e0d\u786e\u5b9a\u6027)\u5982\u679c\u5f97\u5230\u4ee5\u4e0b\u6761\u4ef6:<\/p>\n

\n\tØ Mφ> 45°\u5178\u578b(Mφ=\u76f8\u4f4d\u8fdf\u6ede\u6ce8\u610f\u5230,\u589e\u76ca\u7b49\u4e8e0 db + 180°,\u4e0e\u76f8\u4f4d\u8fdf\u6ede< 0)\u3002<\/p>\n

\n\tØ Mg > 12 dB\u7684\u5178\u578b(Mg =\u8870\u51cf\u6ce8\u610f\u5230180°\u76f8\u4f4d\u8fdf\u6ede)\u3002<\/p>\n

\n\t\u6846\u56fe\u6982\u62ec\u4e86\u8fd9\u4e00\u4e00\u822c\u539f\u5219:<\/p>\n

\n\t<\/p>\n

\n\t1.1.4.1 \u7535\u673a\u7535\u538b\u5faa\u73af\u7a33\u5b9a<\/p>\n

\n\tv \u6a21\u62df\u65b9\u6848<\/p>\n

\n\t<\/p>\n

\n\t\u4e3a\u4e86\u9a8c\u8bc1\u5176\u7a33\u5b9a\u6027\uff0c\u5bf9VBAT ={3.5V, 13.5V\u548c16V} 3\u4e2a\u503c\u8fdb\u884c\u4e86\u4eff\u771f\u3002<\/p>\n

\n\tv \u4eff\u771f\u7ed3\u679c<\/p>\n

\n\tIPP IRF3305 MOSFET\u5728VBAT={6.5V, 13.5\u548c16V}\u548cDC\u8bf7\u6c42= 5V\u7684\u4eff\u771f\u7ed3\u679c:<\/p>\n

\n\t<\/p>\n

\n\tv \u7ed3\u8bba:<\/span><\/p>\n

\n\t\u6211\u4eec\u89c2\u5bdf\u5230\u8fb9\u7f18\u9636\u6bb5(\u9636\u6bb5\u4ef7\u503c\u5f53\u589e\u76ca= 1\u4f0f\u7279\u5206\u8d1d)\u9ad8\u4e8e45°\u76843\u573a\u6548\u7535\u6676\u4f53\u5728\u7535\u538b\u7535\u6e90(13.5 v\u548c3.5 v,16 v)\u548c\u76f4\u6d41\u8bf7\u6c42\u7684\u503c\u65e0\u5173\u3002\u56e0\u6b64\uff0c\u57283mosfet\u7684\u4f5c\u7528\u4e0b\uff0c\u7535\u538b\u8c03\u8282\u56de\u8def\u662f\u7a33\u5b9a\u7684\u3002<\/p>\n

\n\t1.1.1.1 \u7535\u6d41\u73af\u7a33\u5b9a<\/p>\n

\n\tv \u6a21\u62df\u65b9\u6848<\/p>\n

\n\t<\/p>\n

\n\tv \u4eff\u771f\u7ed3\u679c<\/p>\n

\n\tIPP 80N06S2-05 MOSFET\u5728VBAT = 13\u30015V\u548cDC\u8bf7\u6c42= 5V\u65f6\u7684\u4eff\u771f\u7ed3\u679c:<\/p>\n

\n\t<\/p>\n

\n\tv \u7ed3\u8bba:<\/p>\n

\n\t\u6211\u4eec\u89c2\u5bdf\u5230\u8fb9\u7f18\u9636\u6bb5(\u9636\u6bb5\u4ef7\u503c\u5f53\u589e\u76ca= 1\u4f0f\u7279\u5206\u8d1d)\u9ad8\u4e8e45°\u76843\u573a\u6548\u7535\u6676\u4f53\u5728\u7535\u538b\u7535\u6e90(13.5 v\u548c3.5 v,16 v)\u548c\u76f4\u6d41\u8bf7\u6c42\u7684\u503c\u65e0\u5173\u3002\u56e0\u6b64\uff0c\u57283mosfet\u7684\u4f5c\u7528\u4e0b\uff0c\u7535\u538b\u8c03\u8282\u56de\u8def\u662f\u7a33\u5b9a\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

1.1\u7a33\u5b9a\u56de\u8def\u6bd4\u8f83:\u7535\u538b\u56de\u8def\u8c03\u8282\uff0c\u7535\u6d41\u56de\u8def\u9650\u5236\u3002 \u672c\u7ae0\u8ba8\u8bba\u529f\u7387 MOSFET \u53d8\u5316\u5bf9\u4e24\u4e2a\u56de\u8def(\u7535\u6d41\u548c\u7535\u538b)\u884c\u4e3a\u7684\u5f71\u54cd\u3002\u7531\u4e8eMOSFET\u53ea\u5f71\u54cd\u529f\u7387\u5355\u5143\uff0c\u6240\u4ee5\u7406\u8bba\u7814\u7a76\u53ea\u9002\u7528\u4e8e\u529f\u7387\u5355\u5143\u6a21\u578b\u3002 1.1.1\u6a21<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/996"}],"collection":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=996"}],"version-history":[{"count":0,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/996\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=996"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}