{"id":1820,"date":"2018-12-18T07:35:41","date_gmt":"2018-12-18T07:35:41","guid":{"rendered":""},"modified":"2018-12-18T15:36:10","modified_gmt":"2018-12-18T07:36:10","slug":"mos%e5%bc%80%e5%85%b3%e7%ae%a1%e7%9a%84%e9%80%89%e6%8b%a9%e5%8f%8a%e5%8e%9f%e7%90%86%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1820","title":{"rendered":"MOS\u5f00\u5173\u7ba1\u7684\u9009\u62e9\u53ca\u539f\u7406\u5e94\u7528"},"content":{"rendered":"

\n\t\u4e00\u822c\u60c5\u51b5\u4e0b\u666e\u904d\u7528\u4e8e\u9ad8\u7aef\u9a71\u52a8\u7684MOS\uff0c\u5bfc\u901a\u65f6\u9700\u8981\u662f\u6805\u6781\u7535\u538b\u5927\u4e8e\u6e90\u6781\u7535\u538b\uff0c\u800c\u9ad8\u7aef\u9a71\u52a8\u7684MOS\u7ba1\u5bfc\u901a\u65f6\u6e90\u6781\u7535\u538b\u4e0e\u6f0f\u6781\u7535\u538b(VCC)\u76f8\u540c\uff0c\u6240\u4ee5\u8fd9\u65f6\u6805\u6781\u7535\u538b\u8981\u6bd4VCC\u59274V\u621610V\u3002\u5982\u679c\u5728\u540c\u4e00\u4e2a\u7cfb\u7edf\u91cc\uff0c\u8981\u5f97\u5230\u6bd4VCC\u5927\u7684\u7535\u538b\uff0c\u5c31\u8981\u4e13\u95e8\u7684\u5347\u538b\u7535\u8def\u4e86\u3002\u5f88\u591a\u9a6c\u8fbe\u9a71\u52a8\u5668\u90fd\u96c6\u6210\u4e86\u7535\u8377\u6cf5\uff0c\u8981\u6ce8\u610f\u7684\u662f\u5e94\u8be5\u9009\u62e9\u5408\u9002\u7684\u5916\u63a5\u7535\u5bb9\uff0c\u4ee5\u5f97\u5230\u8db3\u591f\u7684\u77ed\u8def\u7535\u6d41\u53bb\u9a71\u52a8MOS\u7ba1\u3002<\/p>\n

\n\tMOS\u7ba1\u662f\u7535\u538b\u9a71\u52a8\uff0c\u6309\u7406\u8bf4\u53ea\u8981\u6805\u6781\u7535\u538b\u5230\u5230\u5f00\u542f\u7535\u538b\u5c31\u80fd\u5bfc\u901aDS\uff0c\u6805\u6781\u4e32\u591a\u5927\u7535\u963b\u5747\u80fd\u5bfc\u901a\u3002\u4f46\u5982\u679c\u8981\u6c42\u5f00\u5173\u9891\u7387\u8f83\u9ad8\u65f6\uff0c\u6805\u5bf9\u5730\u6216VCC\u53ef\u4ee5\u770b\u505a\u662f\u4e00\u4e2a\u7535\u5bb9\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u7535\u5bb9\u6765\u8bf4\uff0c\u4e32\u7684\u7535\u963b\u8d8a\u5927\uff0c\u6805\u6781\u8fbe\u5230\u5bfc\u901a\u7535\u538b\u65f6\u95f4\u8d8a\u957f\uff0cMOS\u5904\u4e8e\u534a\u5bfc\u901a\u72b6\u6001\u65f6\u95f4\u4e5f\u8d8a\u957f\uff0c\u5728\u534a\u5bfc\u901a\u72b6\u6001\u5185\u963b\u8f83\u5927\uff0c\u53d1\u70ed\u4e5f\u4f1a\u589e\u5927\uff0c\u6781\u6613\u635f\u574fMOS\uff0c\u6240\u4ee5\u9ad8\u9891\u65f6\u6805\u6781\u6805\u6781\u4e32\u7684\u7535\u963b\u4e0d\u4f46\u8981\u5c0f\uff0c\u4e00\u822c\u8981\u52a0\u524d\u7f6e\u9a71\u52a8\u7535\u8def\u7684\u3002<\/p>\n

\n\t\u4e0b\u9762\u6211\u4eec\u5148\u6765\u4e86\u89e3\u4e00\u4e0b<\/p>\n

\n\tMOS\u7ba1\u5f00\u5173\u7684\u57fa\u7840\u77e5\u8bc6<\/p>\n

\n\t1<\/p>\n

\n\tMOS\u7ba1\u79cd\u7c7b\u548c\u7ed3\u6784<\/p>\n

\n\tMOSFET\u7ba1\u662fFET\u7684\u4e00\u79cd(\u53e6\u4e00\u79cd\u662fJFET)\uff0c\u53ef\u4ee5\u88ab\u5236\u9020\u6210\u589e\u5f3a\u578b\u6216\u8017\u5c3d\u578b\uff0cP\u6c9f\u9053\u6216N\u6c9f\u9053\u51714\u79cd\u7c7b\u578b\uff0c\u4f46\u5b9e\u9645\u5e94\u7528\u7684\u53ea\u6709\u589e\u5f3a\u578b\u7684N\u6c9f\u9053MOS\u7ba1\u548c\u589e\u5f3a\u578b\u7684P\u6c9f\u9053MOS\u7ba1\uff0c\u6240\u4ee5\u901a\u5e38\u63d0\u5230NMOS\uff0c\u6216\u8005PMOS\u6307\u7684\u5c31\u662f\u8fd9\u4e24\u79cd\u3002<\/p>\n

\n\t\u5bf9\u4e8e\u8fd9\u4e24\u79cd\u589e\u5f3a\u578bMOS\u7ba1\uff0c\u6bd4\u8f83\u5e38\u7528\u7684\u662fNMOS —— \u539f\u56e0\u662f\u5bfc\u901a\u7535\u963b\u5c0f\uff0c\u4e14\u5bb9\u6613\u5236\u9020\uff0c\u6240\u4ee5\u5f00\u5173\u7535\u6e90\u548c\u9a6c\u8fbe\u9a71\u52a8\u7684\u5e94\u7528\u4e2d\uff0c\u4e00\u822c\u90fd\u7528NMOS\u3002<\/p>\n

\n\tMOS\u7ba1\u7684\u4e09\u4e2a\u7ba1\u811a\u4e4b\u95f4\u6709\u5bc4\u751f\u7535\u5bb9\u5b58\u5728\uff0c\u8fd9\u4e0d\u662f\u6211\u4eec\u9700\u8981\u7684\uff0c\u800c\u662f\u7531\u4e8e\u5236\u9020\u5de5\u827a\u9650\u5236\u4ea7\u751f\u7684\u3002\u5bc4\u751f\u7535\u5bb9\u7684\u5b58\u5728\u4f7f\u5f97\u5728\u8bbe\u8ba1\u6216\u9009\u62e9\u9a71\u52a8\u7535\u8def\u7684\u65f6\u5019\u8981\u9ebb\u70e6\u4e00\u4e9b\uff0c\u4f46\u6ca1\u6709\u529e\u6cd5\u907f\u514d\uff0c\u540e\u8fb9\u518d\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

\n\t\u5728MOS\u7ba1\u7684\u6f0f\u6781\u548c\u6e90\u6781\u4e4b\u95f4\u6709\u4e00\u4e2a\u5bc4\u751f\u4e8c\u6781\u7ba1\uff0c\u8fd9\u4e2a\u53eb\u4f53\u4e8c\u6781\u7ba1\uff0c\u5728\u9a71\u52a8\u611f\u6027\u8d1f\u8f7d(\u5982\u9a6c\u8fbe)\uff0c\u8fd9\u4e2a\u4e8c\u6781\u7ba1\u5f88\u91cd\u8981\u3002\u987a\u4fbf\u8bf4\u4e00\u53e5\uff0c\u4f53\u4e8c\u6781\u7ba1\u53ea\u5728\u5355\u4e2a\u7684MOS\u7ba1\u4e2d\u5b58\u5728\uff0c\u5728\u96c6\u6210\u7535\u8def\u82af\u7247\u5185\u90e8\u901a\u5e38\u662f\u6ca1\u6709\u7684\u3002<\/p>\n

\n\t2<\/p>\n

\n\tMOS\u7ba1\u5bfc\u901a\u7279\u6027<\/p>\n

\n\t\u5bfc\u901a\u7684\u610f\u601d\u662f\u4f5c\u4e3a\u5f00\u5173\uff0c\u76f8\u5f53\u4e8e\u5f00\u5173\u95ed\u5408\u3002<\/p>\n

\n\tNMOS\u7684\u7279\u6027\uff0cVgs\u5927\u4e8e\u4e00\u5b9a\u7684\u503c\u5c31\u4f1a\u5bfc\u901a\uff0c\u9002\u5408\u7528\u4e8e\u6e90\u6781\u63a5\u5730\u65f6\u7684\u60c5\u51b5(\u4f4e\u7aef\u9a71\u52a8)\uff0c\u53ea\u8981\u6805\u6781\u7535\u538b\u8fbe\u52304V\u621610V\u5c31\u53ef\u4ee5\u4e86\u3002PMOS\u7684\u7279\u6027\uff0cVgs\u5c0f\u4e8e\u4e00\u5b9a\u7684\u503c\u5c31\u4f1a\u5bfc\u901a\uff0c\u9002\u5408\u7528\u4e8e\u6e90\u6781\u63a5VCC\u65f6\u7684\u60c5\u51b5(\u9ad8\u7aef\u9a71\u52a8)\u3002<\/p>\n

\n\t\u4f46\u662f\uff0c\u867d\u7136PMOS\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u7528\u4f5c\u9ad8\u7aef\u9a71\u52a8\uff0c\u4f46\u7531\u4e8e\u5bfc\u901a\u7535\u963b\u5927\uff0c\u4ef7\u683c\u8d35\uff0c\u66ff\u6362\u79cd\u7c7b\u5c11\u7b49\u539f\u56e0\uff0c\u5728\u9ad8\u7aef\u9a71\u52a8\u4e2d\uff0c\u901a\u5e38\u8fd8\u662f\u4f7f\u7528NMOS\u3002<\/p>\n

\n\t3<\/p>\n

\n\tMOS\u5f00\u5173\u7ba1\u635f\u5931<\/p>\n

\n\t\u4e0d\u7ba1\u662fNMOS\u8fd8\u662fPMOS\uff0c\u5bfc\u901a\u540e\u90fd\u6709\u5bfc\u901a\u7535\u963b\u5b58\u5728\uff0c\u8fd9\u6837\u7535\u6d41\u5c31\u4f1a\u5728\u8fd9\u4e2a\u7535\u963b\u4e0a\u6d88\u8017\u80fd\u91cf\uff0c\u8fd9\u90e8\u5206\u6d88\u8017\u7684\u80fd\u91cf\u53eb\u505a\u5bfc\u901a\u635f\u8017\u3002\u9009\u62e9\u5bfc\u901a\u7535\u963b\u5c0f\u7684MOS\u7ba1\u4f1a\u51cf\u5c0f\u5bfc\u901a\u635f\u8017\u3002\u73b0\u5728\u7684\u5c0f\u529f\u7387MOS\u7ba1\u5bfc\u901a\u7535\u963b\u4e00\u822c\u5728\u51e0\u5341\u6beb\u6b27\u5de6\u53f3\uff0c\u51e0\u6beb\u6b27\u7684\u4e5f\u6709\u3002<\/p>\n

\n\tMOS\u5728\u5bfc\u901a\u548c\u622a\u6b62\u7684\u65f6\u5019\uff0c\u4e00\u5b9a\u4e0d\u662f\u5728\u77ac\u95f4\u5b8c\u6210\u7684\u3002MOS\u4e24\u7aef\u7684\u7535\u538b\u6709\u4e00\u4e2a\u4e0b\u964d\u7684\u8fc7\u7a0b\uff0c\u6d41\u8fc7\u7684\u7535\u6d41\u6709\u4e00\u4e2a\u4e0a\u5347\u7684\u8fc7\u7a0b\uff0c\u5728\u8fd9\u6bb5\u65f6\u95f4\u5185\uff0cMOS\u7ba1\u7684\u635f\u5931\u662f\u7535\u538b\u548c\u7535\u6d41\u7684\u4e58\u79ef\uff0c\u53eb\u505a\u5f00\u5173\u635f\u5931\u3002\u901a\u5e38\u5f00\u5173\u635f\u5931\u6bd4\u5bfc\u901a\u635f\u5931\u5927\u5f97\u591a\uff0c\u800c\u4e14\u5f00\u5173\u9891\u7387\u8d8a\u5feb\uff0c\u635f\u5931\u4e5f\u8d8a\u5927\u3002<\/p>\n

\n\t\u5bfc\u901a\u77ac\u95f4\u7535\u538b\u548c\u7535\u6d41\u7684\u4e58\u79ef\u5f88\u5927\uff0c\u9020\u6210\u7684\u635f\u5931\u4e5f\u5c31\u5f88\u5927\u3002\u7f29\u77ed\u5f00\u5173\u65f6\u95f4\uff0c\u53ef\u4ee5\u51cf\u5c0f\u6bcf\u6b21\u5bfc\u901a\u65f6\u7684\u635f\u5931\uff1b\u964d\u4f4e\u5f00\u5173\u9891\u7387\uff0c\u53ef\u4ee5\u51cf\u5c0f\u5355\u4f4d\u65f6\u95f4\u5185\u7684\u5f00\u5173\u6b21\u6570\u3002\u8fd9\u4e24\u79cd\u529e\u6cd5\u90fd\u53ef\u4ee5\u51cf\u5c0f\u5f00\u5173\u635f\u5931\u3002<\/p>\n

\n\t4<\/p>\n

\n\tMOS\u7ba1\u9a71\u52a8<\/p>\n

\n\t\u8ddf\u53cc\u6781\u6027\u6676\u4f53\u7ba1\u76f8\u6bd4\uff0c\u4e00\u822c\u8ba4\u4e3a\u4f7fMOS\u7ba1\u5bfc\u901a\u4e0d\u9700\u8981\u7535\u6d41\uff0c\u53ea\u8981GS\u7535\u538b\u9ad8\u4e8e\u4e00\u5b9a\u7684\u503c\uff0c\u5c31\u53ef\u4ee5\u4e86\u3002\u8fd9\u4e2a\u5f88\u5bb9\u6613\u505a\u5230\uff0c\u4f46\u662f\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u901f\u5ea6\u3002<\/p>\n

\n\t\u5728MOS\u7ba1\u7684\u7ed3\u6784\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u5728GS\u548cGD\u4e4b\u95f4\u5b58\u5728\u5bc4\u751f\u7535\u5bb9\uff0c\u800cMOS\u7ba1\u7684\u9a71\u52a8\uff0c\u5b9e\u9645\u4e0a\u5c31\u662f\u5bf9\u7535\u5bb9\u7684\u5145\u653e\u7535\u3002\u5bf9\u7535\u5bb9\u7684\u5145\u7535\u9700\u8981\u4e00\u4e2a\u7535\u6d41\uff0c\u56e0\u4e3a\u5bf9\u7535\u5bb9\u5145\u7535\u77ac\u95f4\u53ef\u4ee5\u628a\u7535\u5bb9\u770b\u6210\u77ed\u8def\uff0c\u6240\u4ee5\u77ac\u95f4\u7535\u6d41\u4f1a\u6bd4\u8f83\u5927\u3002\u9009\u62e9\/\u8bbe\u8ba1MOS\u7ba1\u9a71\u52a8\u65f6\u7b2c\u4e00\u8981\u6ce8\u610f\u7684\u662f\u53ef\u63d0\u4f9b\u77ac\u95f4\u77ed\u8def\u7535\u6d41\u7684\u5927\u5c0f\u3002<\/p>\n

\n\t\u800c\u5728\u8fdb\u884cMOSFET\u7684\u9009\u62e9\u65f6\uff0c\u56e0\u4e3aMOSFET\u6709\u4e24\u5927\u7c7b\u578b\uff1aN\u6c9f\u9053\u548cP\u6c9f\u9053\u3002\u5728\u529f\u7387\u7cfb\u7edf\u4e2d\uff0cMOSFET\u53ef\u88ab\u770b\u6210\u7535\u6c14\u5f00\u5173\u3002\u5f53\u5728N\u6c9f\u9053MOSFET\u7684\u6805\u6781\u548c\u6e90\u6781\u95f4\u52a0\u4e0a\u6b63\u7535\u538b\u65f6\uff0c\u5176\u5f00\u5173\u5bfc\u901a\u3002\u5bfc\u901a\u65f6\uff0c\u7535\u6d41\u53ef\u7ecf\u5f00\u5173\u4ece\u6f0f\u6781\u6d41\u5411\u6e90\u6781\u3002\u6f0f\u6781\u548c\u6e90\u6781\u4e4b\u95f4\u5b58\u5728\u4e00\u4e2a\u5185\u963b\uff0c\u79f0\u4e3a\u5bfc\u901a\u7535\u963bRDS(ON)\u3002<\/p>\n

\n\t\u5fc5\u987b\u6e05\u695aMOSFET\u7684\u6805\u6781\u662f\u4e2a\u9ad8\u963b\u6297\u7aef\uff0c\u56e0\u6b64\uff0c\u603b\u662f\u8981\u5728\u6805\u6781\u52a0\u4e0a\u4e00\u4e2a\u7535\u538b\uff0c\u8fd9\u5c31\u662f\u540e\u9762\u4ecb\u7ecd\u7535\u8def\u56fe\u4e2d\u6805\u6781\u6240\u63a5\u7535\u963b\u81f3\u5730\u3002\u5982\u679c\u6805\u6781\u4e3a\u60ac\u7a7a\uff0c\u5668\u4ef6\u5c06\u4e0d\u80fd\u6309\u8bbe\u8ba1\u610f\u56fe\u5de5\u4f5c\uff0c\u5e76\u53ef\u80fd\u5728\u4e0d\u6070\u5f53\u7684\u65f6\u523b\u5bfc\u901a\u6216\u5173\u95ed\uff0c\u5bfc\u81f4\u7cfb\u7edf\u4ea7\u751f\u6f5c\u5728\u7684\u529f\u7387\u635f\u8017\u3002\u5f53\u6e90\u6781\u548c\u6805\u6781\u95f4\u7684\u7535\u538b\u4e3a\u96f6\u65f6\uff0c\u5f00\u5173\u5173\u95ed\uff0c\u800c\u7535\u6d41\u505c\u6b62\u901a\u8fc7\u5668\u4ef6\u3002\u867d\u7136\u8fd9\u65f6\u5668\u4ef6\u5df2\u7ecf\u5173\u95ed\uff0c\u4f46\u4ecd\u7136\u6709\u5fae\u5c0f\u7535\u6d41\u5b58\u5728\uff0c\u8fd9\u79f0\u4e4b\u4e3a\u6f0f\u7535\u6d41\uff0c\u5373IDSS\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u7b2c\u4e00\u6b65\uff1a\u9009\u7528N\u6c9f\u9053\u8fd8\u662fP\u6c9f\u9053<\/p>\n

\n\t\u4e3a\u8bbe\u8ba1\u9009\u62e9\u6b63\u786e\u5668\u4ef6\u7684\u7b2c\u4e00\u6b65\u662f\u51b3\u5b9a\u91c7\u7528N\u6c9f\u9053\u8fd8\u662fP\u6c9f\u9053MOSFET\u3002\u5728\u5178\u578b\u7684\u529f\u7387\u5e94\u7528\u4e2d\uff0c\u5f53\u4e00\u4e2aMOSFET\u63a5\u5730\uff0c\u800c\u8d1f\u8f7d\u8fde\u63a5\u5230\u5e72\u7ebf\u7535\u538b\u4e0a\u65f6\uff0c\u8be5MOSFET\u5c31\u6784\u6210\u4e86\u4f4e\u538b\u4fa7\u5f00\u5173\u3002\u5728\u4f4e\u538b\u4fa7\u5f00\u5173\u4e2d\uff0c\u5e94\u91c7\u7528N\u6c9f\u9053MOSFET\uff0c\u8fd9\u662f\u51fa\u4e8e\u5bf9\u5173\u95ed\u6216\u5bfc\u901a\u5668\u4ef6\u6240\u9700\u7535\u538b\u7684\u8003\u8651\u3002<\/p>\n

\n\t\u5f53MOSFET\u8fde\u63a5\u5230\u603b\u7ebf\u53ca\u8d1f\u8f7d\u63a5\u5730\u65f6\uff0c\u5c31\u8981\u7528\u9ad8\u538b\u4fa7\u5f00\u5173\u3002\u901a\u5e38\u4f1a\u5728\u8fd9\u4e2a\u62d3\u6251\u4e2d\u91c7\u7528P\u6c9f\u9053MOSFET\uff0c\u8fd9\u4e5f\u662f\u51fa\u4e8e\u5bf9\u7535\u538b\u9a71\u52a8\u7684\u8003\u8651\u3002<\/p>\n

\n\t\u7b2c\u4e8c\u6b65\uff1a\u786e\u5b9a\u989d\u5b9a\u7535\u6d41<\/p>\n

\n\t\u7b2c\u4e8c\u6b65\u662f\u9009\u62e9MOSFET\u7684\u989d\u5b9a\u7535\u6d41\uff0c\u89c6\u7535\u8def\u7ed3\u6784\u800c\u5b9a\uff0c\u8be5\u989d\u5b9a\u7535\u6d41\u5e94\u662f\u8d1f\u8f7d\u5728\u6240\u6709\u60c5\u51b5\u4e0b\u80fd\u591f\u627f\u53d7\u7684\u6700\u5927\u7535\u6d41\u3002\u4e0e\u7535\u538b\u7684\u60c5\u51b5\u76f8\u4f3c\uff0c\u8bbe\u8ba1\u4eba\u5458\u5fc5\u987b\u786e\u4fdd\u6240\u9009\u7684MOSFET\u80fd\u627f\u53d7\u8fd9\u4e2a\u989d\u5b9a\u7535\u6d41\uff0c\u5373\u4f7f\u5728\u7cfb\u7edf\u4ea7\u751f\u5c16\u5cf0\u7535\u6d41\u65f6\u3002\u4e24\u4e2a\u8003\u8651\u7684\u7535\u6d41\u60c5\u51b5\u662f\u8fde\u7eed\u6a21\u5f0f\u548c\u8109\u51b2\u5c16\u5cf0\u3002<\/p>\n

\n\t\u5728\u8fde\u7eed\u5bfc\u901a\u6a21\u5f0f\u4e0b\uff0cMOSFET\u5904\u4e8e\u7a33\u6001\uff0c\u6b64\u65f6\u7535\u6d41\u8fde\u7eed\u901a\u8fc7\u5668\u4ef6\u3002\u8109\u51b2\u5c16\u5cf0\u662f\u6307\u6709\u5927\u91cf\u7535\u6d8c(\u6216\u5c16\u5cf0\u7535\u6d41)\u6d41\u8fc7\u5668\u4ef6\uff0c\u4e00\u65e6\u786e\u5b9a\u4e86\u8fd9\u4e9b\u6761\u4ef6\u4e0b\u7684\u6700\u5927\u7535\u6d41\uff0c\u53ea\u9700\u76f4\u63a5\u9009\u62e9\u80fd\u627f\u53d7\u8fd9\u4e2a\u6700\u5927\u7535\u6d41\u7684\u5668\u4ef6\u4fbf\u53ef\u3002<\/p>\n

\n\t\u9009\u597d\u989d\u5b9a\u7535\u6d41\u540e\uff0c\u8fd8\u5fc5\u987b\u8ba1\u7b97\u5bfc\u901a\u635f\u8017\u3002\u5728\u5b9e\u9645\u60c5\u51b5\u4e0b\uff0cMOSFET\u5e76\u4e0d\u662f\u7406\u60f3\u7684\u5668\u4ef6\uff0c\u56e0\u4e3a\u5728\u5bfc\u7535\u8fc7\u7a0b\u4e2d\u4f1a\u6709\u7535\u80fd\u635f\u8017\uff0c\u8fd9\u79f0\u4e4b\u4e3a\u5bfc\u901a\u635f\u8017\u3002MOSFET\u5728“\u5bfc\u901a”\u65f6\u5c31\u50cf\u4e00\u4e2a\u53ef\u53d8\u7535\u963b\uff0c\u7531\u5668\u4ef6\u7684RDS(ON)\u6240\u786e\u5b9a\uff0c\u5e76\u968f\u6e29\u5ea6\u800c\u663e\u7740\u53d8\u5316\u3002<\/p>\n

\n\t\u5668\u4ef6\u7684\u529f\u7387\u8017\u635f\u53ef\u7531Iload2×RDS(ON)\u8ba1\u7b97\uff0c\u7531\u4e8e\u5bfc\u901a\u7535\u963b\u968f\u6e29\u5ea6\u53d8\u5316\uff0c\u56e0\u6b64\u529f\u7387\u8017\u635f\u4e5f\u4f1a\u968f\u4e4b\u6309\u6bd4\u4f8b\u53d8\u5316\u3002\u5bf9MOSFET\u65bd\u52a0\u7684\u7535\u538bVGS\u8d8a\u9ad8\uff0cRDS(ON)\u5c31\u4f1a\u8d8a\u5c0f\uff0c\u53cd\u4e4bRDS(ON)\u5c31\u4f1a\u8d8a\u9ad8\u3002<\/p>\n

\n\t\u5bf9\u7cfb\u7edf\u8bbe\u8ba1\u4eba\u5458\u6765\u8bf4\uff0c\u8fd9\u5c31\u662f\u53d6\u51b3\u4e8e\u7cfb\u7edf\u7535\u538b\u800c\u9700\u8981\u6298\u4e2d\u6743\u8861\u7684\u5730\u65b9\u3002\u5bf9\u4fbf\u643a\u5f0f\u8bbe\u8ba1\u6765\u8bf4\uff0c\u91c7\u7528\u8f83\u4f4e\u7684\u7535\u538b\u6bd4\u8f83\u5bb9\u6613(\u8f83\u4e3a\u666e\u904d)\uff0c\u800c\u5bf9\u4e8e\u5de5\u4e1a\u8bbe\u8ba1\uff0c\u53ef\u91c7\u7528\u8f83\u9ad8\u7684\u7535\u538b\u3002\u6ce8\u610fRDS(ON)\u7535\u963b\u4f1a\u968f\u7740\u7535\u6d41\u8f7b\u5fae\u4e0a\u5347\uff0c\u5173\u4e8eRDS(ON)\u7535\u963b\u7684\u5404\u79cd\u7535\u6c14\u53c2\u6570\u53d8\u5316\u53ef\u5728\u5236\u9020\u5546\u63d0\u4f9b\u7684\u6280\u672f\u8d44\u6599\u8868\u4e2d\u67e5\u5230\u3002<\/p>\n

\n\t\u7b2c\u4e09\u6b65\uff1a\u786e\u5b9a\u70ed\u8981\u6c42<\/p>\n

\n\t\u9009\u62e9MOSFET\u7684\u4e0b\u4e00\u6b65\u662f\u8ba1\u7b97\u7cfb\u7edf\u7684\u6563\u70ed\u8981\u6c42\u3002\u8bbe\u8ba1\u4eba\u5458\u5fc5\u987b\u8003\u8651\u4e24\u79cd\u4e0d\u540c\u7684\u60c5\u51b5\uff0c\u5373\u6700\u574f\u60c5\u51b5\u548c\u771f\u5b9e\u60c5\u51b5\u3002\u5efa\u8bae\u91c7\u7528\u9488\u5bf9\u6700\u574f\u60c5\u51b5\u7684\u8ba1\u7b97\u7ed3\u679c\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u7ed3\u679c\u63d0\u4f9b\u66f4\u5927\u7684\u5b89\u5168\u4f59\u91cf\uff0c\u80fd\u786e\u4fdd\u7cfb\u7edf\u4e0d\u4f1a\u5931\u6548\u3002\u5728MOSFET\u7684\u8d44\u6599\u8868\u4e0a\u8fd8\u6709\u4e00\u4e9b\u9700\u8981\u6ce8\u610f\u7684\u6d4b\u91cf\u6570\u636e\uff0c\u6bd4\u5982\u5c01\u88c5\u5668\u4ef6\u7684\u534a\u5bfc\u4f53\u7ed3\u4e0e\u73af\u5883\u4e4b\u95f4\u7684\u70ed\u963b\uff0c\u4ee5\u53ca\u6700\u5927\u7684\u7ed3\u6e29\u3002<\/p>\n

\n\t\u5668\u4ef6\u7684\u7ed3\u6e29\u7b49\u4e8e\u6700\u5927\u73af\u5883\u6e29\u5ea6\u52a0\u4e0a\u70ed\u963b\u4e0e\u529f\u7387\u8017\u6563\u7684\u4e58\u79ef(\u7ed3\u6e29=\u6700\u5927\u73af\u5883\u6e29\u5ea6 [\u70ed\u963b×\u529f\u7387\u8017\u6563])\uff0c\u6839\u636e\u8fd9\u4e2a\u65b9\u7a0b\u53ef\u89e3\u51fa\u7cfb\u7edf\u7684\u6700\u5927\u529f\u7387\u8017\u6563\uff0c\u5373\u6309\u5b9a\u4e49\u76f8\u7b49\u4e8eI2×RDS(ON)\u3002\u7531\u4e8e\u8bbe\u8ba1\u4eba\u5458\u5df2\u786e\u5b9a\u5c06\u8981\u901a\u8fc7\u5668\u4ef6\u7684\u6700\u5927\u7535\u6d41\uff0c\u56e0\u6b64\u53ef\u4ee5\u8ba1\u7b97\u51fa\u4e0d\u540c\u6e29\u5ea6\u4e0b\u7684RDS(ON)\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5728\u5904\u7406\u7b80\u5355\u70ed\u6a21\u578b\u65f6\uff0c\u8bbe\u8ba1\u4eba\u5458\u8fd8\u5fc5\u987b\u8003\u8651\u534a\u5bfc\u4f53\u7ed3\/\u5668\u4ef6\u5916\u58f3\u53ca\u5916\u58f3\/\u73af\u5883\u7684\u70ed\u5bb9\u91cf\uff0c\u5373\u8981\u6c42\u5370\u5237\u7535\u8def\u677f\u548c\u5c01\u88c5\u4e0d\u4f1a\u7acb\u5373\u5347\u6e29\u3002<\/p>\n

\n\t\u901a\u5e38\uff0c\u4e00\u4e2aPMOS\u7ba1\uff0c\u4f1a\u6709\u5bc4\u751f\u7684\u4e8c\u6781\u7ba1\u5b58\u5728\uff0c\u8be5\u4e8c\u6781\u7ba1\u7684\u4f5c\u7528\u662f\u9632\u6b62\u6e90\u6f0f\u7aef\u53cd\u63a5\uff0c\u5bf9\u4e8ePMOS\u800c\u8a00\uff0c\u6bd4\u8d77NMOS\u7684\u4f18\u52bf\u5728\u4e8e\u5b83\u7684\u5f00\u542f\u7535\u538b\u53ef\u4ee5\u4e3a0,\u800cDS\u7535\u538b\u4e4b\u95f4\u7535\u538b\u76f8\u5dee\u4e0d\u5927\uff0c\u800cNMOS\u7684\u5bfc\u901a\u6761\u4ef6\u8981\u6c42VGS\u8981\u5927\u4e8e\u9608\u503c\uff0c\u8fd9\u5c06\u5bfc\u81f4\u63a7\u5236\u7535\u538b\u5fc5\u7136\u5927\u4e8e\u6240\u9700\u7684\u7535\u538b\uff0c\u4f1a\u51fa\u73b0\u4e0d\u5fc5\u8981\u7684\u9ebb\u70e6\u3002<\/p>\n

\n\t\u9009\u7528PMOS\u4f5c\u4e3a\u63a7\u5236\u5f00\u5173\uff0c\u6709\u4e0b\u9762\u4e24\u79cd\u5e94\u7528\uff1a<\/p>\n

\n\t1<\/p>\n

\n\t<\/p>\n

\n\t\u7531PMOS\u6765\u8fdb\u884c\u7535\u538b\u7684\u9009\u62e9\uff0c\u5f53V8V\u5b58\u5728\u65f6\uff0c\u6b64\u65f6\u7535\u538b\u5168\u90e8\u7531V8V\u63d0\u4f9b\uff0c\u5c06PMOS\u5173\u95ed\uff0cVBAT\u4e0d\u63d0\u4f9b\u7535\u538b\u7ed9VSIN\uff0c\u800c\u5f53V8V\u4e3a\u4f4e\u65f6\uff0cVSIN\u75318V\u4f9b\u7535\u3002\u6ce8\u610fR120\u7684\u63a5\u5730\uff0c\u8be5\u7535\u963b\u80fd\u5c06\u6805\u6781\u7535\u538b\u7a33\u5b9a\u5730\u62c9\u4f4e\uff0c\u786e\u4fddPMOS\u7684\u6b63\u5e38\u5f00\u542f\uff0c\u8fd9\u4e5f\u662f\u524d\u6587\u6240\u63cf\u8ff0\u7684\u6805\u6781\u9ad8\u963b\u6297\u6240\u5e26\u6765\u7684\u72b6\u6001\u9690\u60a3\u3002D9\u548cD10\u7684\u4f5c\u7528\u5728\u4e8e\u9632\u6b62\u7535\u538b\u7684\u5012\u704c\u3002D9\u53ef\u4ee5\u7701\u7565\u3002\u8fd9\u91cc\u8981\u6ce8\u610f\u5230\u5b9e\u9645\u4e0a\u8be5\u7535\u8def\u7684DS\u63a5\u53cd\uff0c\u8fd9\u6837\u7531\u9644\u751f\u4e8c\u6781\u7ba1\u5bfc\u901a\u5bfc\u81f4\u4e86\u5f00\u5173\u7ba1\u7684\u529f\u80fd\u4e0d\u80fd\u8fbe\u5230\uff0c\u5b9e\u9645\u5e94\u7528\u8981\u6ce8\u610f\u3002<\/p>\n

\n\t2<\/p>\n

\n\t<\/p>\n

\n\t\u6765\u770b\u8fd9\u4e2a\u7535\u8def\uff0c\u63a7\u5236\u4fe1\u53f7PGC\u63a7\u5236V4.2\u662f\u5426\u7ed9P_GPRS\u4f9b\u7535\u3002\u6b64\u7535\u8def\u4e2d\uff0c\u6e90\u6f0f\u4e24\u7aef\u6ca1\u6709\u63a5\u53cd\uff0cR110\u4e0eR113\u5b58\u5728\u7684\u610f\u4e49\u5728\u4e8eR110\u63a7\u5236\u6805\u6781\u7535\u6d41\u4e0d\u81f3\u4e8e\u8fc7\u5927\uff0cR113\u63a7\u5236\u6805\u6781\u7684\u5e38\u6001\uff0c\u5c06R113\u4e0a\u62c9\u4e3a\u9ad8\uff0c\u622a\u81f3PMOS\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u770b\u4f5c\u662f\u5bf9\u63a7\u5236\u4fe1\u53f7\u7684\u4e0a\u62c9\u3002\u5f53MCU\u5185\u90e8\u7ba1\u811a\u5e76\u6ca1\u6709\u4e0a\u62c9\u65f6\uff0c\u5373\u8f93\u51fa\u4e3a\u5f00\u6f0f\u65f6\uff0c\u5e76\u4e0d\u80fd\u9a71\u52a8PMOS\u5173\u95ed\uff0c\u6b64\u65f6\uff0c\u5c31\u9700\u8981\u5916\u90e8\u7535\u538b\u7ed9\u4e88\u7684\u4e0a\u62c9\uff0c\u6240\u4ee5\u7535\u963bR113\u8d77\u5230\u4e86\u4e24\u4e2a\u4f5c\u7528\u3002R110\u53ef\u4ee5\u66f4\u5c0f\uff0c\u5230100\u6b27\u59c6\u4e5f\u53ef\u3002<\/p>\n

\n\t5<\/p>\n

\n\tMOS\u7ba1\u7684\u5f00\u5173\u7279\u6027<\/p>\n

\n\t\u9759\u6001\u7279\u6027<\/p>\n

\n\tMOS\u7ba1\u4f5c\u4e3a\u5f00\u5173\u5143\u4ef6\uff0c\u540c\u6837\u662f\u5de5\u4f5c\u5728\u622a\u6b62\u6216\u5bfc\u901a\u4e24\u79cd\u72b6\u6001\u3002\u7531\u4e8eMOS\u7ba1\u662f\u7535\u538b\u63a7\u5236\u5143\u4ef6\uff0c\u6240\u4ee5\u4e3b\u8981\u7531\u6805\u6e90\u7535\u538buGS\u51b3\u5b9a\u5176\u5de5\u4f5c\u72b6\u6001\u3002<\/p>\n

\n\t\u5de5\u4f5c\u7279\u6027\u5982\u4e0b\uff1a<\/p>\n

\n\tuGS\u5f00\u542f\u7535\u538bUT\uff1aMOS\u7ba1\u5de5\u4f5c\u5728\u622a\u6b62\u533a\uff0c\u6f0f\u6e90\u7535\u6d41iDS\u57fa\u672c\u4e3a0\uff0c\u8f93\u51fa\u7535\u538buDS≈UDD\uff0cMOS\u7ba1\u5904\u4e8e“\u65ad\u5f00”\u72b6\u6001\uff0c\u5176\u7b49\u6548\u7535\u8def\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n

\n\t<\/p>\n

\n\tuGS>\u5f00\u542f\u7535\u538bUT\uff1aMOS\u7ba1\u5de5\u4f5c\u5728\u5bfc\u901a\u533a\uff0c\u6f0f\u6e90\u7535\u6d41iDS=UDD\/(RD rDS)\u3002\u5176\u4e2d\uff0crDS\u4e3aMOS\u7ba1\u5bfc\u901a\u65f6\u7684\u6f0f\u6e90\u7535\u963b\u3002\u8f93\u51fa\u7535\u538bUDS=UDD·rDS\/(RD rDS)\uff0c\u5982\u679crDS\u300aRD\uff0c\u5219uDS≈0V\uff0cMOS\u7ba1\u5904\u4e8e“\u63a5\u901a”\u72b6\u6001\uff0c\u5176\u7b49\u6548\u7535\u8def\u5982\u4e0a\u56fe(c)\u6240\u793a\u3002<\/p>\n

\n\t\u52a8\u6001\u7279\u6027<\/p>\n

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