{"id":3380,"date":"2021-08-26T01:24:49","date_gmt":"2021-08-26T01:24:49","guid":{"rendered":""},"modified":"2021-08-26T09:25:12","modified_gmt":"2021-08-26T01:25:12","slug":"%e5%88%a9%e7%94%a8%e5%8f%af%e6%89%a9%e5%b1%95%e7%94%b5%e6%b5%81%e8%b4%9f%e8%bd%bd%e6%8f%90%e4%be%9b%e6%81%92%e5%ae%9a%e7%94%b5%e9%98%bb%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3380","title":{"rendered":"\u5229\u7528\u53ef\u6269\u5c55\u7535\u6d41\u8d1f\u8f7d\u63d0\u4f9b\u6052\u5b9a\u7535\u963b\u6a21\u5f0f"},"content":{"rendered":"
\n\t\u5bf9\u7535\u6e90\u548c\u7535\u6c60<\/u>\u8fdb\u884c\u6d4b\u8bd5<\/u>\uff0c\u9700\u8981\u4f7f\u7528\u80fd\u591f\u5438\u6536\u5927\u7535\u6d41<\/u>\u5e76\u80fd\u6d88\u8017\u5927\u91cf\u529f\u7387\u7684\u7535\u6d41\u8d1f\u8f7d\u3002\u672c\u6587\u6240\u4ecb\u7ecd\u7684\u8fd9\u79cd\u7535\u6d41\u8d1f\u8f7d\u8bbe\u8ba1\u7b80\u5355\u800c\u53c8\u51c6\u786e\uff0c\u5b83\u53ea\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u8fd0\u7b97\u653e\u5927\u5668<\/u>\u548c\u4e00\u4e2a\u529f\u7387MOSFET<\/u>\u5c31\u53ef\u4ee5\u6784\u5efa\uff0c\u5982\u56fe1\u6240\u793a\u3002<\/p>\n
\n\t<\/p>\n
\n\t\u56fe1\uff1a\u8fd9\u79cd\u7535\u6d41\u8d1f\u8f7d\u975e\u5e38\u7b80\u5355\uff0c\u5e76\u8054\u591a\u4e2aMOSFET\u53ef\u4ee5\u5b9e\u73b0\u66f4\u5927\u7684\u7535\u6d41\u548c\u529f\u8017\u3002<\/p>\n
\n\t\u6d41\u8fc7Q1\u7684\u7535\u6d41\u53ef\u4ee5\u901a\u8fc7\u4e0b\u5f0f\u6c42\u5f97\uff1a<\/p>\n
\n\t <\/p>\n
\n\t\u8fd9\u4e2a\u7535\u6d41\u53ef\u4ee5\u901a\u8fc7\u6539\u53d8\u53c2\u8003\u7535\u538b\uff08VR<\/u>EF\uff09\u8f7b\u677e\u5b9e\u73b0\u63a7\u5236\u3002\u8fd0\u7b97\u653e\u5927\u5668\u5e94\u5177\u6709\u4f4e\u8f93\u5165\u5931\u8c03\u7535\u538b\uff0c\u5e76\u80fd\u91c7\u7528\u5355\u7535\u6e90\u4f9b\u7535\u3002<\/p>\n
\n\t\u5982\u679c\u8981\u4f7f\u7535\u8def<\/u>\u80fd\u591f\u5438\u6536\u5927\u7535\u6d41\u6216\u6d88\u8017\u6570\u5341\u74e6\u7684\u529f\u7387\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u8fd0\u7b97\u653e\u5927\u5668\u6765\u5bf9\u591a\u4e2a\u5e76\u8054\u5de5\u4f5c\u7684MOSFET\u8fdb\u884c\u63a7\u5236\u3002\u4f46\u662f\uff0c\u7b80\u5355\u5730\u5e76\u8054MOSFET\u4f1a\u4ea7\u751f\u4e24\u4e2a\u4e0d\u826f\u5f71\u54cd\u3002\u4e00\u65b9\u9762\uff0c\u4e0d\u540c\u7684\u6676\u4f53\u7ba1<\/u>\uff0c\u5373\u4f7f\u5b83\u4eec\u7684\u578b\u53f7\u76f8\u540c\uff0c\u5176\u5bfc\u901a\u9608\u503c\u901a\u5e38\u4e5f\u6709\u6240\u4e0d\u540c\uff0c\u5e76\u4e14\u5b83\u4eec\u7684\u9608\u503c\u5177\u6709\u8d1f\u6e29\u5ea6\u7cfb\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u9996\u5148\uff0c\u6bcf\u4e2a\u6676\u4f53<\/u>\u7ba1\u7684\u6f0f\u6781\u7535\u6d41\u4e4b\u95f4\u53ef\u80fd\u5b58\u5728\u5f88\u5927\u7684\u5dee\u5f02\uff0c\u4e00\u65e6\u6676\u4f53\u7ba1\u53d1\u70ed\uff0c\u5176\u9608\u503c\u5c31\u4f1a\u964d\u4f4e\uff0c\u8fd9\u53c8\u4f1a\u8fdb\u4e00\u6b65\u4f7f\u7535\u6d41\u589e\u5927\u800c\u4f7f\u4e4b\u53d8\u5f97\u66f4\u70ed\u3002<\/p>\n
\n\t\u4e3a\u4e86\u4f7f\u6676\u4f53\u7ba1\u7535\u6d41\u5747\u8861\uff0c\u53ef\u4ee5\u5bf9\u6bcf\u4e2a\u6676\u4f53\u7ba1\u7684\u6e90\u6781\u589e\u52a0\u4e00\u4e2a\u4e32\u8054\u7684\u5c0f\u7535\u963b\u5668<\/u>\u3002\u4e3a\u4e86\u4f7f\u5176\u6709\u6548\uff0c\u5fc5\u987b\u4f7f\u6e90\u6781\u7535\u963b<\/u>\u4e24\u7aef\u7684\u7535\u538b\u964d\u4e0e\u9608\u503c\u76f8\u5f53\uff0c\u8fd9\u5c31\u4f1a\u5360\u75281V\u7684\u5f88\u5927\u4e00\u90e8\u5206\u3002\u8fd9\u6837\uff0c\u5747\u8861\u7535\u963b\u5c31\u4f1a\u6d88\u8017\u5f88\u5927\u529f\u7387\uff0c\u5176\u4e24\u7aef\u7684\u538b\u964d\u4e5f\u5c31\u4f1a\u5360\u7528\u7535\u8def\u53ef\u5de5\u4f5c\u7684\u6700\u5c0f\u7535\u538b\u3002<\/p>\n
\n\t\u4e00\u79cd\u5efa\u7acb\u5927\u7535\u6d41\u3001\u9ad8\u529f\u7387\u8d1f\u8f7d\u7684\u66f4\u597d\u7684\u65b9\u6cd5\u662f\u5bf9\u6bcf\u4e2aMOSFET\u8fdb\u884c\u5206\u522b\u63a7\u5236\uff0c\u8fd9\u6837\u5c31\u80fd\u907f\u514d\u7531\u4e8e\u9608\u503c\u6563\u5e03\u800c\u5f15\u8d77\u7684\u7535\u6d41\u4e0d\u5e73\u8861\u3002\u56fe2\u6240\u793a\u7684\u7535\u8def\u5305\u542b\u4e24\u4e2a\u8fd9\u6837\u7684\u7535\u8def\u5757\uff0c\u4f46\u4e5f\u53ef\u4ee5\u6309\u9700\u6dfb\u52a0\u66f4\u591a\u3002\u5728\u8df3\u7ebf<\/u>J1\u95ed\u5408\u3001J2\u65ad\u5f00\u7684\u60c5\u51b5\u4e0b\uff0c\u7535\u8def\u4ee5\u6052\u6d41\u6a21\u5f0f\u5de5\u4f5c\uff0c\u603b\u8d1f\u8f7d\u7535\u6d41\u7531\u4e0b\u5f0f\u7ed9\u51fa\uff1a<\/p>\n
\n\t <\/p>\n
\n\t\u5982\u679c\u68c0\u6d4b\u7535\u963b\u7684\u6570\u503c\u76f8\u7b49\uff08R2=R5=RS<\/u>\uff09\uff0c\u5219\u603b\u8d1f\u8f7d\u7535\u6d41\u53ef\u4ee5\u7b80\u5316\u4e3a\uff1a<\/p>\n
\n\t <\/p>\n
\n\t<\/p>\n
\n\t\u56fe2\uff1a\u8fd9\u79cd\u7535\u6d41\u8d1f\u8f7d\u539f\u7406\u56fe\u4f7f\u7528\u4e86\u4e24\u4e2a\u72ec\u7acb\u63a7\u5236\u7684MOSFET\u3002<\/p>\n
\n\t\u8981\u6d4b\u91cf<\/u>\u603b\u8d1f\u8f7d\u7535\u6d41\uff0c\u5c31\u9700\u8981\u5bf9\u6bcf\u4e2a\u6676\u4f53\u7ba1\u7684\u7535\u6d41\u8fdb\u884c\u6c42\u548c\uff0c\u5728\u672c\u4f8b\u4e2d\u53ef\u4ee5\u901a\u8fc7\u5bf9\u6240\u6709\u68c0\u6d4b\u7535\u963b\u5668\u7684\u538b\u964d\u8fdb\u884c\u6c42\u548c\u6765\u5b9e\u73b0\u3002\u901a\u5e38\uff0c\u8fd9\u662f\u7531\u4e00\u4e2a\u53cd\u76f8\u52a0\u6cd5\u5668\u540e\u63a5\u4e00\u4e2a\u53cd\u76f8\u5668\u5b8c\u6210\u7684\uff0c\u4e5f\u5373\u4f7f\u7528\u4e24\u4e2a\u8fd0\u7b97\u653e\u5927\u5668\u6765\u642d\u5efa\u3002\u7f3a\u70b9\u662f\u7531\u4e8e\u52a0\u6cd5\u5668\u8f93\u51fa\u7aef\u4f1a\u53d1\u751f\u7535\u538b\u53cd\u8f6c\uff0c\u56e0\u6b64\u8fd9\u4e24\u4e2a\u8fd0\u653e\u9700\u8981\u4f7f\u7528\u53cc\u6781\u6027\u7535\u6e90\u4f9b\u7535\u3002<\/p>\n
\n\t\u672c\u8bbe\u8ba1\u5b9e\u4f8b\u4f7f\u7528\u4e86\u4e00\u79cd\u66f4\u7b80\u5355\u7684\u65b9\u6cd5\u6765\u5bf9\u7535\u538b\u964d\u8fdb\u884c\u6c42\u548c\uff0c\u90a3\u5c31\u662f\u4f7f\u7528\u7535\u963bR7\u548cR8\u4ee5\u53ca\u4ec5\u4e00\u4e2a\u8fd0\u7b97\u653e\u5927\u5668\u3002\u8fd9\u79cd\u52a0\u6cd5\u7684\u539f\u7406\u5982\u56fe3\u6240\u793a\u3002N\u4e2a\u7535\u963b\u5668\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5747\u7531\u4e00\u4e2a\u5177\u6709\u975e\u5e38\u4f4e\u963b\u6297<\/u>\u7684\u7535\u538b\u6e90\u9a71\u52a8\uff0c\u4e5f\u5373\u672c\u4f8b\u4e2d\u5728\u68c0\u6d4b\u7535\u963b\u5668\u4e24\u7aef\u65bd\u52a0\u538b\u964d\u65f6\u6240\u5f97\u5230\u7684\u7ed3\u679c\u3002<\/p>\n
\n\t<\/p>\n
\n\t\u56fe3\uff1a\u8fd9\u5f20\u56fe\u8bf4\u660e\u4e86\u5728VOUT\u5904\u6240\u5b9e\u73b0\u7684\u7535\u538b\u6c42\u548c\u3002<\/p>\n
\n\t\u5982\u679cVOUT\u7aef\u5b50\u6ca1\u6709\u7535\u6d41\u6d41\u51fa\uff0c\u5219\u6839\u636e\u57fa\u5c14\u970d\u592b\u5b9a\u5f8b\u53ef\u5f97\uff1a<\/p>\n
\n\t <\/p>\n
\n\t\u56e0\u6b64\uff1a<\/p>\n
\n\t <\/p>\n
\n\t\u5728\u6709\u4e24\u4e2a\u68c0\u6d4b\u7535\u963b\u5668\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u56fe2\u6240\u793a\uff0cU2A\u7684\u540c\u76f8\u8f93\u5165\u7aef\u7684\u7535\u538b\u662fR2\u548cR5\u4e24\u7aef\u538b\u964d\u4e4b\u548c\u7684\u4e00\u534a\u3002\u5728\u7ecf\u8fc72\u500d\u589e\u76ca\u7684U2A\u540e\uff0c\u8f93\u51fa\u7535\u538bIMON\u5c31\u662f\u4e24\u4e2a\u68c0\u6d4b\u7535\u963b\u5668\u7535\u538b\u7684\u603b\u548c\uff0c\u7528\u5b83\u5c31\u53ef\u4ee5\u76d1\u89c6\u603b\u8d1f\u8f7d\u7535\u6d41\u7684\u5927\u5c0f\u3002\u901a\u8fc7\u5e76\u8054\u6dfb\u52a0\u66f4\u591a\u7684\u57fa\u672c\u6a21\u5757\uff0c\u5c31\u53ef\u4ee5\u5bf9\u7535\u8def\u8fdb\u884c\u6269\u5c55\uff0c\u7136\u540e\u9488\u5bf9\u6a21\u5757\u6570\u91cf\u4f7f\u7528\u5f0f3\u548c\u5f0f5\uff0c\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u603b\u8d1f\u8f7d\u7535\u6d41\uff0c\u4ee5\u53caU2A\u653e\u5927\u4e4b\u524d\u7684\u68c0\u6d4b\u7535\u6d41\u8f93\u51fa\u3002\u4e3a\u65b9\u4fbf\u8d77\u89c1\uff0c\u5bf9\u4e8e\u4e09\u4e2a\u7535\u6e90\u5757\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u56db\u8fd0\u7b97\u653e\u5927\u5668\u3002<\/p>\n
\n\t\u6700\u540e\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u7535\u6d41\u8d1f\u8f7d\u8bbe\u7f6e\u6210\u6052\u5b9a\u7535\u963b\uff0c\u8fd9\u5728\u6d4b\u8bd5\u67d0\u4e9b\u7535\u6e90\u65f6\u5c31\u975e\u5e38\u6709\u7528\u3002\u5176\u5b9e\u73b0\u65b9\u6cd5\u662f\u63d0\u4f9b\u4e00\u90e8\u5206\u8d1f\u8f7d\u7535\u538bVL\u4f5c\u4e3a\u53c2\u8003\u7535\u538b\u3002\u5c06\u8df3\u7ebfJ2\u95ed\u5408\uff08J1\u65ad\u5f00\uff09\uff0cU1A\u548cU1B\u7684\u540c\u76f8\u8f93\u5165\u7aef\u7684\u7535\u538b\u5c31\u7531VL\u548c\u7531R9\u548cR10\u5f62\u6210\u7684\u5206\u538b\u5668\u6240\u51b3\u5b9a\uff0c\u56e0\u6b64\u8d1f\u8f7d\u7535\u6d41\u53d8\u4e3a\uff1a<\/p>\n
\n\t <\/p>\n
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\n\t <\/p>\n
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