{"id":3276,"date":"2021-08-16T06:52:35","date_gmt":"2021-08-16T06:52:35","guid":{"rendered":""},"modified":"2021-08-16T14:53:05","modified_gmt":"2021-08-16T06:53:05","slug":"%e5%b8%b8%e8%a7%81%e7%9a%84mosfet%e9%a9%b1%e5%8a%a8%e6%96%b9%e5%bc%8f%ef%bc%8c%e9%a9%b1%e5%8a%a8%e7%94%b5%e8%b7%af%e7%9a%84%e5%8f%82%e6%95%b0%e8%ae%a1%e7%ae%97","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3276","title":{"rendered":"\u5e38\u89c1\u7684MOSFET\u9a71\u52a8\u65b9\u5f0f\uff0c\u9a71\u52a8\u7535\u8def\u7684\u53c2\u6570\u8ba1\u7b97"},"content":{"rendered":"

\n\t\u5728\u7b80\u5355\u7684\u4e86\u89e3MOS\u7ba1\u7684\u57fa\u672c\u539f\u7406\u4ee5\u53ca\u76f8\u5173\u53c2\u6570\u540e\uff0c\u5982\u4f55\u5728\u5b9e\u9645\u7684\u7535\u8def<\/u>\u4e2d\u8fd0\u7528\u662f\u6211\u4eec\u52aa\u529b\u7684\u65b9\u5411\u3002\u6bd4\u5982\u5728\u5b9e\u9645\u7684MOS\u9a71\u52a8\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u5982\u4f55\u53bb\u6839\u636e\u9700\u6c42\u642d\u5efa\u7535\u8def\uff0c\u8ba1\u7b97\u53c2\u6570\uff0c\u6839\u636e\u7279\u6027\u5b8c\u5584\u7535\u8def\uff0c\u6839\u636e\u5b9e\u9645\u9700\u6c42\u7559\u4f59\u91cf\u7b49\u7b49\uff0c\u5728\u8fd9\u4e9b\u7ea6\u675f\u6761\u4ef6\u4e0b\u642d\u5efa\u4e00\u4e2a\u76f8\u5bf9\u5b8c\u5584\u7684\u7535\u8def\u3002\u53c2\u8003\u4e86\u4e00\u4e9b\u8d44\u6599\u540e\uff0c\u5c31\u6211\u76ee\u524d\u7684\u9700\u6c42\u548c\u81ea\u8eab\u7684\u7406\u89e3\u529b\u5206\u4eab\u76f8\u5173\u7684\u4e00\u4e9b\u7b14\u8bb0\u548c\u7406\u89e3\u3002<\/p>\n

\n\t1. \u5e38\u89c1\u7684MOSFET<\/u>\u9a71\u52a8\u65b9\u5f0f<\/p>\n

\n\t\u76f4\u63a5\u9a71\u52a8<\/p>\n

\n\t\u6700\u7b80\u5355\u7684\u9a71\u52a8\u65b9\u5f0f\uff0c\u6bd4\u5982\u7528\u5355\u7247\u673a<\/u>\u8f93\u51faPWM\u4fe1\u53f7\u6765\u9a71\u52a8\u8f83\u5c0f\u7684MOS\u3002\u4f7f\u7528\u8fd9\u79cd\u9a71\u52a8\u65b9\u5f0f\uff0c\u5e94\u6ce8\u610f\u51e0\u70b9\uff1b\u4e00\u662f\u5b9e\u9645PWM\u548cMOS\u7684\u8d70\u7ebf\u8ddd<\/u>\u79bb\u5fc5\u5b9a\u5bfc\u81f4\u5bc4\u751f\u7535\u611f\u5f15\u8d77\u9707\u8361\u566a\u58f0\uff0c\u4e8c\u662f\u82af\u7247\u7684\u9a71\u52a8\u5cf0\u503c\u7535\u6d41<\/u>\uff0c\u56e0\u4e3a\u4e0d\u540c\u82af\u7247\u5bf9\u5916\u9a71\u52a8\u80fd\u529b\u4e0d\u4e00\u6837\u3002\u4e09\u662fMOS\u7684\u5bc4\u751f\u7535\u5bb9Cgs\u3001Cgd\u5982\u679c\u6bd4\u8f83\u5927\uff0c\u5bfc\u901a\u5c31\u9700\u8981\u5927\u7684\u80fd\u91cf\uff0c\u6ca1\u6709\u8db3\u591f\u7684\u5cf0\u503c\u7535\u6d41\uff0c\u5bfc\u901a\u7684\u901f\u5ea6\u5c31\u4f1a\u6bd4\u8f83\u6162\u3002<\/p>\n

\n\t\"o4YBAGCfK--AGpbsAADvY0cxrig211.png\"<\/p>\n

\n\t\u56fe\u817e\u67f1\/\u63a8\u62c9\u5f0f\u9a71\u52a8\u7535\u8def<\/p>\n

\n\t\u7531\u4e24\u4e2a\u4e09\u6781\u7ba1<\/u>\u6784\u6210\uff0c\u4e0a\u7ba1\u662fNPN\u578b\uff0c\u4e0b\u7ba1\u662fPNP\u578b\u4e09\u6781\u7ba1\uff0c\u4e24\u5bf9\u7ba1\u5171\u5c04\u8054\u63a5\u5904\u4e3a\u8f93\u51fa\u7aef\uff0c\u7ed3\u6784\u7c7b\u4f3c\u4e8e\u4e59\u7c7b\u63a8\u633d\u529f\u7387\u653e\u5927\u5668<\/u>\u3002\u5229\u7528\u8fd9\u79cd\u62d3\u6251\u653e\u5927\u9a71\u52a8\u4fe1\u53f7\uff0c\u589e\u5f3a\u7535\u6d41\u80fd\u529b\u3002\uff08\u9a71\u52a8IC\u5185\u90e8\u4e5f\u662f\u96c6\u6210\u4e86\u7c7b\u4f3c\u7684\u7ed3\u6784\uff09<\/p>\n

\n\t\"pIYBAGCfK_WABaS3AAEPgaWSiRw797.png\"<\/p>\n

\n\t\u9694\u79bb\u5f0f\u9a71\u52a8\u7535\u8def<\/p>\n

\n\t\u4e3a\u4e86\u6ee1\u8db3\u5b89\u5168\u9694\u79bb\u4e5f\u4f1a\u7528\u53d8\u538b\u5668<\/u>\u9a71\u52a8\u3002\u5982\u56fe\u5176\u4e2dR1\u6291\u5236\u632f\u8361\uff0cC1\u9694\u76f4\u6d41\u901a\u4ea4\u6d41\u540c\u65f6\u9632\u6b62\u78c1\u82af\u9971\u548c\u3002\u9694\u79bb\u5f0f\u7684\u9a71\u52a8\u7535\u8def\u4e0d\u592a\u5e38\u89c1\uff0c\u5c31\u4e0d\u505a\u8fc7\u591a\u7684\u4e86\u89e3\u3002<\/p>\n

\n\t\"pIYBAGCfLAqAMMeCAADea_wVjJY174.png\"<\/p>\n

\n\t\u5c0f\u7ed3\uff1a\u5f53\u7136\u9664\u4ee5\u4e0a\u9a71\u52a8\u7535\u8def\u4e4b\u5916\uff0c\u8fd8\u6709\u5f88\u591a\u5176\u5b83\u5f62\u5f0f\u7684\u9a71\u52a8\u7535\u8def\u3002\u5bf9\u4e8e\u5404\u79cd\u5404\u6837\u7684\u9a71\u52a8\u7535\u8def\u5e76\u6ca1\u6709\u4e00\u79cd\u662f\u6700\u597d\u7684\uff0c\u53ea\u80fd\u7ed3\u5408\u5177\u4f53\u5e94\u7528\uff0c\u9009\u62e9\u6700\u5408\u9002\u7684\u62d3\u6251\u3002<\/p>\n

\n\t2. \u9a71\u52a8\u7535\u8def\u7684\u53c2\u6570\u8ba1\u7b97<\/p>\n

\n\t\u6211\u7684\u5b9e\u9645\u5de5\u4f5c\u4e2d\u78b0\u5230\u6700\u591a\u7684\u9a71\u52a8\u7535\u8def\u662f\u4ee5\u4e0b\u8fd9\u79cd\u80fd\u591f\u63a7\u5236\u5f00\u5173\u901f\u5ea6\u7684\u9a71\u52a8\u7535\u8def\uff0c\u6211\u5c31\u4ee5\u5b83\u4e3e\u4f8b\u505a\u8fdb\u4e00\u6b65\u7684\u5206\u6790\u3002<\/p>\n

\n\t\"o4YBAGCfLBCAIgkfAAY11ys6fng199.png\"<\/p>\n

\n\t\u5982\u56fe\uff0c\u5728\u9a71\u52a8\u7535\u963b<\/u>Rg2\u4e0a\u5e76\u8054\u4e00\u4e2a\u4e8c\u6781\u7ba1<\/u>\u3002\u5176\u4e2dD1\u5e38\u7528\u5feb\u6062\u590d\u4e8c\u6781\u7ba1\uff0c\u4f7f\u5173\u65ad\u65f6\u95f4\u51cf\u5c0f\u540c\u65f6\u51cf\u5c0f\u5173\u65ad\u635f\u8017\uff0cRg1\u53ef\u4ee5\u9650\u5236\u5173\u65ad\u7535\u6d41\uff0cR1\u4e3amos\u7ba1\u6805\u6e90\u6781\u7684\u4e0b\u62c9\u7535\u963b\uff0c\u7ed9mos\u7ba1\u6805\u6781\u79ef\u7d2f\u7684\u7535\u8377\u63d0\u4f9b\u6cc4\u653e\u56de\u8def\u3002\uff08\u6839\u636eMOSFET\u6805\u6781\u9ad8\u8f93\u5165\u963b\u6297<\/u>\u7684\u7279\u6027\uff0c\u4e00\u70b9\u70b9\u9759\u7535\u6216\u8005\u5e72\u6270\u90fd\u53ef\u80fd\u5bfc\u81f4MOS\u7ba1\u8bef\u5bfc\u901a\uff0c\u6240\u4ee5R1\u4e5f\u8d77\u964d\u4f4e\u8f93\u5165\u963b\u6297\u4f5c\u7528\uff0c\u4e00\u822c\u53d6\u503c\u572810k~\u51e0\u5341k\uff09<\/p>\n

\n\tLp\u4e3a\u9a71\u52a8\u8d70\u7ebf\u7684\u6742\u6563\u5bc4\u751f\u7535\u611f\uff0c\u5305\u62ec\u9a71\u52a8IC\u5f15\u811a\u3001MOS\u5f15\u811a\u3001PCB\u8d70\u7ebf<\/u>\u7684\u611f\u6297\uff0c\u7cbe\u786e\u7684\u6570\u503c\u5f88\u96be\u786e\u5b9a\uff0c\u901a\u5e38\u53d6\u51e0\u5341nH\u3002<\/p>\n

\n\t\u9a71\u52a8\u7535\u963bRg\u7684\u8ba1\u7b97<\/p>\n

\n\t\u9a71\u52a8\u8d70\u7ebf\u7684\u5bc4\u751f\u7535\u611f\u548cMOS\u7ba1\u7684\u7ed3\u7535\u5bb9<\/u>\u4f1a\u7ec4\u6210\u4e00\u4e2aLC\u632f\u8361\u7535\u8def\uff0c\u5982\u679c\u9a71\u52a8\u82af\u7247\u7684\u8f93\u51fa\u7aef\u76f4\u63a5\u5230\u6805\u6781\u7684\u8bdd\uff0c\u5728PWM\u6ce2\u7684\u4e0a\u5347\u4e0b\u964d\u6cbf\u4f1a\u4ea7\u751f\u5f88\u5927\u7684\u9707\u8361\uff0c\u5bfc\u81f4MOS\u7ba1\u6025\u5267\u53d1\u70ed\u751a\u81f3\u7206\u70b8\uff0c\u4e00\u822c\u7684\u89e3\u51b3\u65b9\u6cd5\u662f\u5728\u6805\u6781\u4e32\u8054\u7535\u963b\uff0c\u964d\u4f4eLC\u632f\u8361\u7535\u8def\u7684Q\u503c\uff0c\u4f7f\u9707\u8361\u8fc5\u901f\u8870\u51cf\u6389\u3002<\/p>\n

\n\t\"pIYBAGCfLBaAcAnDAAZLVF3VwlA283.png\"<\/p>\n

\n\t\u9a71\u52a8\u7535\u963b\u4e0b\u9650\u503c\uff1a\u5f53mos\u5f00\u901a\u77ac\u95f4\uff0cVcc\u901a\u8fc7\u9a71\u52a8\u7535\u963b\u7ed9Ciss=Cgs+Cgd\u5145\u7535\uff0c\u5982\u4e0a\u56fe\u6240\u793a\uff08\u5ffd\u7565\u4e0b\u62c9\u7535\u963bR1\u7684\u5f71\u54cd\uff09\u3002\u6839\u636eLC\u9707\u8361\u7535\u8def\u6a21\u578b\uff0c\u53ef\u4ee5\u5217\u51fa\u56de\u8def\u5728\u590d\u9891\u57df\u5185\u5bf9\u5e94\u7684\u65b9\u7a0b\u3002<\/p>\n

\n\t\"o4YBAGCfLB2AJk69AAD07rWIiog911.png\"<\/p>\n

\n\t\u6c42\u89e3\u51faig\uff0c\u5e76\u5316\u4e3a\u5178\u578b\u4e8c\u9636\u7cfb\u7edf\u7684\u5f62\u5f0f<\/p>\n

\n\t\"pIYBAGCfLCKAYXDQAAHdac92EkA265.png\"<\/p>\n

\n\t\u518d\u6839\u636eLC\u632f\u8361\u7535\u8def\u6c42\u89e3\u4e8c\u9636\u7cfb\u7edf\u963b\u5c3c\u7cfb\u6bd4<\/p>\n

\n\t\"o4YBAGCfLCiAVV1QAAEZZIqcFAM659.png\"<\/p>\n

\n\t\u90a3\u4e48\u6839\u636eLC\u632f\u8361\u7535\u8def\u7684\u7279\u6027\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u9a71\u52a8\u7535\u6d41ig\u4e0d\u53d1\u751f\u9707\u8361\uff0c\u8be5\u7cfb\u7edf\u8981\u5904\u4e8e\u8fc7\u963b\u5c3c\u7684\u72b6\u6001\uff1b\u5373\u963b\u5c3c\u6bd4\u5fc5\u987b\u5927\u4e8e1\uff0c\u5219\u65b9\u7a0b\u5f0f\u89e3\u5f97Rg=Rg1+Rg2\u7684\u4e0b\u9650\u8303\u56f4<\/p>\n

\n\t\"pIYBAGCfLC-AGaMAAAD7Ti4Zkt4431.png\"<\/p>\n

\n\t\u9a71\u52a8\u5173\u65ad\u7535\u963b\u4e0a\u9650\u503c\uff1aMOS\u5173\u65ad\u65f6\uff0cVds\u4f1a\u4ea7\u751f\u5f88\u5927\u7684dv\/dt\uff0c\u90a3\u4e48\u7531\u4e8e\u5bc4\u751f\u7535\u5bb9Cgd\u7684\u5b58\u5728\uff0c\u5c31\u4f1a\u5bf9\u56de\u8def\u8fdb\u884c\u653e\u7535\u7ee7\u800c\u4ea7\u751f\u8f83\u5927\u7684\u7535\u6d41\uff0c\u6839\u636e\u516c\u5f0f\uff1aIc=Cdv\/dt\u3002\u90a3\u4e48\u56de\u8def\u4e0aIgd\u6d41\u8fc7\u9a71\u52a8\u7535\u963bRg\uff0c\u53c8\u4f1a\u5728GS\u95f4\u4ea7\u751f\u4e00\u4e2a\u7535\u538bVgoff=IgdxRg\u3002\u8fd9\u6837\u6211\u4eec\u7684\u65b9\u5411\u5c31\u662f\u4e0d\u80fd\u8ba9\u5176\u9ad8\u4e8eMOS\u5bfc\u901a\u7684\u95e8\u69db\u7535\u538bVth\u4ee5\u907f\u514d\u8bef\u5bfc\u901a\u3002<\/p>\n

\n\t\"o4YBAGCfLDWAGs6WAAWhpcz-kJA749.png\"<\/p>\n

\n\t\u90a3\u4e48\u5217\u51fa\u4e0d\u7b49\u5f0f<\/p>\n

\n\t\"pIYBAGCfLDuAanNMAADPfALUrfY139.png\"<\/p>\n

\n\t\u5219\u89e3\u5f97\u9a71\u52a8\u7535\u963bRgoff=Rg1\u7684\u53d6\u503c\u8303\u56f4<\/p>\n

\n\t\"o4YBAGCfLEGAFmqxAAG2t1tTCuw821.png\"<\/p>\n

\n\t\u603b\u7ed3\uff1a<\/p>\n

\n\t\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e\u7406\u8bba\u516c\u5f0f\uff0c\u4ee5\u907f\u514d\u9a71\u52a8\u7535\u6d41\u4e0d\u53d1\u751f\u9707\u8361\u4e3a\u6761\u4ef6\u8ba1\u7b97\u51faRg1+Rg2\u7684\u4e0b\u9650\u8303\u56f4\uff0c\u4ee5\u907f\u514d\u5173\u65ad\u8bef\u5bfc\u901a\u4e3a\u6761\u4ef6\u5f97\u51fa\u9a71\u52a8\u4e0a\u9650\u503c\u5373\u5f97\u5230Rg1\u7684\u53d6\u503c\u8303\u56f4\u3002<\/p>\n

\n\t\u7136\u540e\u518d\u6839\u636e\u5b9e\u9645\u7684\u5b9e\u9a8c\u5728\u8003\u8651\u635f\u8017\u3001EMI\u3001\u4ee5\u53ca\u5e94\u7528\u5728\u6865\u5f0f\u62d3\u6251\u4e2d\u7684\u6b7b\u533a\u63a7\u5236\u7b49\u4f18\u5316\u65b9\u5411\u4e0a\uff0c\u4e0d\u65ad\u8c03\u8bd5\u51fa\u60f3\u8981\u7279\u6027\u53c2\u6570\u3002\u90a3\u4e48\uff0c\u901a\u8fc7\u57fa\u672c\u7684\u5206\u6790\u540e\uff0c\u6211\u4eec\u4e5f\u5f97\u51fa\u4e00\u4e2aMOS\u9a71\u52a8\u7535\u8def\u8bbe\u8ba1\u7684\u5927\u65b9\u5411\uff1b\u4e00\u4e2a\u597d\u7684MOSFET\u9a71\u52a8\u7535\u8def\u5e94\u5f53\u6709\u4ee5\u4e0b\u51e0\u70b9\u8981\u6c42\uff1a<\/p>\n

\n\t\uff081\uff09 \u5bfc\u901a\u65f6\uff0c\u9a71\u52a8\u7535\u8def\u5e94\u80fd\u63d0\u4f9b\u8db3\u591f\u5927\u7684\u5145\u7535\u7535\u6d41\u4f7fMOSFET\u6805\u6e90\u6781\u95f4\u7535\u538b\u8fc5\u901f\u4e0a\u5347\u5230\u6240\u9700\u503c\uff0c\u4fdd\u8bc1\u5f00\u5173<\/u>\u7ba1\u80fd\u5feb\u901f\u5f00\u901a\u4e14\u4e0d\u5b58\u5728\u4e0a\u5347\u6cbf\u7684\u9ad8\u9891\u632f\u8361\u3002<\/p>\n

\n\t\uff082\uff09 \u5f00\u5173\u5bfc\u901a\u671f\u95f4\u9a71\u52a8\u7535\u8def\u80fd\u4fdd\u8bc1MOSFET\u6805\u6e90\u6781\u95f4\u7535\u538b\u4fdd\u6301\u7a33\u5b9a\u4e14\u53ef\u9760\u5bfc\u901a\u3002<\/p>\n

\n\t\uff083\uff09 \u5173\u65ad\u77ac\u95f4\u9a71\u52a8\u7535\u8def\u8981\u63d0\u4f9b\u4e00\u4e2a\u5c3d\u53ef\u80fd\u4f4e\u963b\u6297\u7684\u901a\u8def\u4f9bMOSFET\u6805\u6e90\u6781\u95f4\u7535\u5bb9\u7535\u538b\u7684\u5feb\u901f\u6cc4\u653e\uff0c\u4fdd\u8bc1\u5f00\u5173\u7ba1\u80fd\u5feb\u901f\u5173\u65ad\uff0c\u540c\u65f6\u53ef\u4ee5\u63d0\u4f9b\u8d1f\u538b\u4ee5\u907f\u514d\u5e72\u6270\u548c\u8bef\u5bfc\u901a\u3002<\/p>\n

\n\t\uff084\uff09 \u9a71\u52a8\u7535\u8def\u7ed3\u6784\u7b80\u5355\u53ef\u9760\u3001\u635f\u8017\u5c0f\uff0c\u8fd8\u8981\u6839\u636e\u60c5\u51b5\u9694\u79bb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728\u7b80\u5355\u7684\u4e86\u89e3MOS\u7ba1\u7684\u57fa\u672c\u539f\u7406\u4ee5\u53ca\u76f8\u5173\u53c2\u6570\u540e\uff0c\u5982\u4f55\u5728\u5b9e\u9645\u7684 \u7535\u8def \u4e2d\u8fd0\u7528\u662f\u6211\u4eec\u52aa\u529b\u7684\u65b9\u5411\u3002\u6bd4\u5982\u5728\u5b9e\u9645\u7684MOS\u9a71\u52a8\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u5982\u4f55\u53bb\u6839\u636e\u9700\u6c42\u642d\u5efa\u7535\u8def\uff0c\u8ba1\u7b97\u53c2\u6570\uff0c\u6839\u636e\u7279\u6027\u5b8c\u5584\u7535<\/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\/3276"}],"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=3276"}],"version-history":[{"count":0,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/3276\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3276"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}