{"id":75834,"date":"2026-02-13T09:26:14","date_gmt":"2026-02-13T01:26:14","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75834.html"},"modified":"2026-02-13T09:26:14","modified_gmt":"2026-02-13T01:26:14","slug":"%e5%b8%b8%e7%94%a8%e7%94%b5%e8%b7%af%e8%a7%a3%e6%9e%90-%e5%bc%80%e5%85%b3%e6%9c%ba%e7%94%b5%e8%b7%af%e8%ae%be%e8%ae%a1%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75834.html","title":{"rendered":"\u5e38\u7528\u7535\u8def\u89e3\u6790\u2014\u2014\u5f00\u5173\u673a\u7535\u8def\u8bbe\u8ba1\u5b9e\u6218"},"content":{"rendered":"

1. \u5f00\u5173\u673a\u7535\u8def\u7684\u91cd\u8981\u6027\u4e0e\u8bbe\u8ba1\u6311\u6218<\/h3>\n

\u5927\u5bb6\u597d，\u4eca\u5929\u6211\u60f3\u548c\u5927\u5bb6\u804a\u804a\u5d4c\u5165\u5f0f\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\u4e00\u4e2a\u975e\u5e38\u57fa\u7840\u4f46\u53c8\u6781\u5176\u91cd\u8981\u7684\u73af\u8282\u2014\u2014\u5f00\u5173\u673a\u7535\u8def\u7684\u8bbe\u8ba1\u3002\u4f5c\u4e3a\u4e00\u4e2a\u5728\u786c\u4ef6\u9886\u57df\u6478\u722c\u6eda\u6253\u591a\u5e74\u7684\u5de5\u7a0b\u5e08，\u6211\u6df1\u77e5\u5f00\u5173\u673a\u7535\u8def\u770b\u4f3c\u7b80\u5355，\u5b9e\u9645\u5374\u6697\u85cf\u7384\u673a\u3002\u5f88\u591a\u521d\u5b66\u8005\u5728\u8bbe\u8ba1\u65f6\u5bb9\u6613\u5ffd\u7565\u7ec6\u8282，\u5bfc\u81f4\u7cfb\u7edf\u4e0d\u7a33\u5b9a\u3001\u529f\u8017\u5f02\u5e38\u751a\u81f3\u65e0\u6cd5\u6b63\u5e38\u5f00\u5173\u673a\u3002\u5f00\u5173\u673a\u7535\u8def\u7684\u6838\u5fc3\u76ee\u6807\u5f88\u660e\u786e：\u5b9e\u73b0\u53ef\u9760\u7684\u5f00\u673a\u3001\u5173\u673a\u548c\u72b6\u6001\u7ef4\u6301，\u540c\u65f6\u517c\u987e\u4f4e\u529f\u8017\u548c\u7a33\u5b9a\u6027\u3002\u65e0\u8bba\u662f\u6d88\u8d39\u7535\u5b50\u4ea7\u54c1\u3001\u5de5\u4e1a\u63a7\u5236\u8bbe\u5907\u8fd8\u662f\u7269\u8054\u7f51\u7ec8\u7aef，\u90fd\u79bb\u4e0d\u5f00\u4e00\u4e2a\u8bbe\u8ba1\u4f18\u826f\u7684\u5f00\u5173\u673a\u7535\u8def\u3002<\/p>\n

\u5728\u5b9e\u9645\u9879\u76ee\u4e2d，\u5f00\u5173\u673a\u7535\u8def\u7684\u8bbe\u8ba1\u5f80\u5f80\u9700\u8981\u7ed3\u5408\u786c\u4ef6\u548c\u8f6f\u4ef6\u7684\u4f18\u52bf\u3002\u7eaf\u786c\u4ef6\u65b9\u6848\u867d\u7136\u54cd\u5e94\u5feb，\u4f46\u7075\u6d3b\u6027\u8f83\u5dee；\u7eaf\u8f6f\u4ef6\u65b9\u6848\u5219\u4f9d\u8d56\u5355\u7247\u673a\u7684\u5de5\u4f5c\u72b6\u6001，\u53ef\u80fd\u5728\u5f02\u5e38\u60c5\u51b5\u4e0b\u5931\u6548\u3002\u56e0\u6b64，\u8f6f\u786c\u4ef6\u7ed3\u5408\u7684\u8bbe\u8ba1\u65b9\u5f0f\u6210\u4e3a\u4e86\u4e3b\u6d41\u3002\u63a5\u4e0b\u6765，\u6211\u4f1a\u4ece\u57fa\u7840\u539f\u7406\u8bb2\u8d77，\u9010\u6b65\u6df1\u5165\u5230\u5b9e\u9645\u8bbe\u8ba1\u4e2d\u7684\u5173\u952e\u7ec6\u8282\u548c\u5e38\u89c1\u95ee\u9898，\u5e2e\u52a9\u5927\u5bb6\u5f7b\u5e95\u638c\u63e1\u5f00\u5173\u673a\u7535\u8def\u7684\u8bbe\u8ba1\u8981\u9886\u3002<\/p>\n

2. \u8f6f\u786c\u4ef6\u7ed3\u5408\u7684\u5f00\u5173\u673a\u7535\u8def\u8bbe\u8ba1<\/h3>\n

2.1 \u8f6f\u4ef6\u63a7\u5236\u578b\u5f00\u5173\u673a\u7535\u8def\u89e3\u6790<\/h4>\n

\u8f6f\u4ef6\u63a7\u5236\u578b\u5f00\u5173\u673a\u7535\u8def\u662f\u76ee\u524d\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u6700\u5e38\u89c1\u7684\u65b9\u6848\u4e4b\u4e00，\u5176\u6838\u5fc3\u601d\u60f3\u662f\u901a\u8fc7\u5355\u7247\u673a\u7684GPIO\u53e3\u63a7\u5236\u7535\u6e90\u7ba1\u7406\u6a21\u5757\u7684\u5f00\u5173\u72b6\u6001\u3002\u8fd9\u79cd\u65b9\u6848\u7684\u4f18\u70b9\u662f\u7075\u6d3b\u6027\u9ad8，\u53ef\u4ee5\u5b9e\u73b0\u590d\u6742\u7684\u5f00\u5173\u673a\u903b\u8f91，\u6bd4\u5982\u957f\u6309\u5173\u673a\u3001\u53cc\u51fb\u5524\u9192\u3001\u5b9a\u65f6\u5f00\u5173\u673a\u7b49\u529f\u80fd\u3002\u4e0b\u9762\u6211\u6765\u8be6\u7ec6\u5206\u6790\u4e00\u4e2a\u5178\u578b\u7684\u8f6f\u4ef6\u63a7\u5236\u578b\u5f00\u5173\u673a\u7535\u8def\u3002<\/p>\n

\u7535\u8def\u7684\u6838\u5fc3\u5143\u4ef6\u5305\u62ec\u4e00\u4e2a\u6309\u952e\u3001\u4e00\u4e2aMOSFET（\u901a\u5e38\u662fP-MOS\u6216N-MOS）\u3001\u4e00\u4e2a\u4e09\u6781\u7ba1（\u5982NPN\u578b）\u4ee5\u53ca\u82e5\u5e72\u7535\u963b\u548c\u7535\u5bb9\u3002\u5355\u7247\u673a\u901a\u8fc7\u4e24\u4e2aGPIO\u53e3\u53c2\u4e0e\u63a7\u5236：\u4e00\u4e2a\u8f93\u51fa\u53e3（\u5982IO1）\u7528\u4e8e\u63a7\u5236\u7535\u6e90\u5f00\u5173，\u53e6\u4e00\u4e2a\u8f93\u5165\u53e3（\u5982IO2）\u7528\u4e8e\u68c0\u6d4b\u6309\u952e\u72b6\u6001\u3002\u4e0a\u7535\u521d\u671f，\u5355\u7247\u673a\u7684IO1\u53e3\u9ed8\u8ba4\u8f93\u51fa\u9ad8\u7535\u5e73，\u4fdd\u6301\u4e09\u6781\u7ba1\u622a\u6b62\u72b6\u6001\u3002\u5f53\u7528\u6237\u6309\u4e0b\u6309\u952e\u65f6，\u6309\u952e\u5c06MOSFET\u7684\u6805\u6781（G\u6781）\u63a5\u5730，\u5bfc\u81f4MOSFET\u7684\u6e90\u6781（S\u6781）\u548c\u6f0f\u6781（D\u6781）\u4e4b\u95f4\u5bfc\u901a，\u4ece\u800c\u4e3a\u5355\u7247\u673a\u4f9b\u7535\u3002<\/p>\n

\u6b64\u65f6，\u5355\u7247\u673a\u7684IO2\u53e3\u4f1a\u68c0\u6d4b\u5230\u4f4e\u7535\u5e73，\u8868\u793a\u6309\u952e\u88ab\u6309\u4e0b\u3002\u5355\u7247\u673a\u542f\u52a8\u540e，IO1\u53e3\u7ee7\u7eed\u8f93\u51fa\u9ad8\u7535\u5e73，\u901a\u8fc7\u4e09\u6781\u7ba1\u7ef4\u6301MOSFET\u7684\u5bfc\u901a\u72b6\u6001，\u5373\u4f7f\u6309\u952e\u677e\u5f00，\u7cfb\u7edf\u4e5f\u80fd\u4fdd\u6301\u4f9b\u7535\u3002\u5173\u673a\u65f6，\u5355\u7247\u673a\u901a\u8fc7\u8f6f\u4ef6\u903b\u8f91\u68c0\u6d4b\u6309\u952e\u957f\u6309\u52a8\u4f5c（\u6bd4\u5982\u6301\u7eed\u6309\u4e0b3\u79d2），\u7136\u540e\u5c06IO1\u53e3\u62c9\u4f4e，\u4f7f\u4e09\u6781\u7ba1\u622a\u6b62，MOSFET\u5173\u95ed，\u4ece\u800c\u5207\u65ad\u7cfb\u7edf\u7535\u6e90\u3002\u8fd9\u79cd\u8bbe\u8ba1\u7684\u5173\u952e\u5728\u4e8e\u8f6f\u4ef6\u903b\u8f91\u7684\u7a33\u5b9a\u6027\u548c\u786c\u4ef6\u7535\u8def\u7684\u914d\u5408\u3002<\/p>\n

\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d，\u6211\u9047\u5230\u8fc7\u51e0\u4e2a\u5e38\u89c1\u95ee\u9898\u3002\u9996\u5148\u662f\u6309\u952e\u6296\u52a8\u95ee\u9898，\u5982\u679c\u8f6f\u4ef6\u6ca1\u6709\u53bb\u6296\u5904\u7406，\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8bef\u89e6\u53d1\u3002\u5176\u6b21\u662f\u7535\u6e90\u7a33\u5b9a\u6027\u95ee\u9898，\u5355\u7247\u673a\u521a\u4e0a\u7535\u65f6IO\u53e3\u72b6\u6001\u53ef\u80fd\u4e0d\u7a33\u5b9a，\u9700\u8981\u5728\u786c\u4ef6\u4e0a\u52a0\u4e0a\u62c9\u7535\u963b\u6216\u7535\u5bb9\u6ee4\u6ce2\u3002\u6700\u540e\u662f\u529f\u8017\u95ee\u9898，\u5f85\u673a\u65f6\u7535\u8def\u4e2d\u7684\u7535\u963b\u548c\u4e09\u6781\u7ba1\u4f1a\u6d88\u8017\u5c11\u91cf\u7535\u6d41，\u9700\u8981\u6839\u636e\u7cfb\u7edf\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u5143\u4ef6\u53c2\u6570\u3002<\/p>\n

2.2 \u786c\u4ef6\u63a7\u5236\u578b\u5f00\u5173\u673a\u7535\u8def\u89e3\u6790<\/h4>\n

\u786c\u4ef6\u63a7\u5236\u578b\u5f00\u5173\u673a\u7535\u8def\u5b8c\u5168\u4e0d\u4f9d\u8d56\u5355\u7247\u673a，\u4ec5\u901a\u8fc7\u6a21\u62df\u7535\u8def\u5b9e\u73b0\u5f00\u5173\u673a\u529f\u80fd\u3002\u8fd9\u79cd\u65b9\u6848\u7684\u4f18\u70b9\u662f\u53ef\u9760\u6027\u9ad8\u3001\u54cd\u5e94\u901f\u5ea6\u5feb，\u9002\u5408\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f，\u6216\u8005\u4f5c\u4e3a\u8f6f\u4ef6\u63a7\u5236\u7535\u8def\u7684\u5907\u4efd\u65b9\u6848\u3002\u4e0b\u9762\u6211\u6765\u62c6\u89e3\u4e00\u4e2a\u5178\u578b\u7684\u786c\u4ef6\u63a7\u5236\u578b\u5f00\u5173\u673a\u7535\u8def\u3002<\/p>\n

\u7535\u8def\u7684\u6838\u5fc3\u662f\u4e00\u4e2aRC\u5ef6\u65f6\u7535\u8def（\u7531\u7535\u963b\u548c\u7535\u5bb9\u7ec4\u6210）\u548c\u4e00\u4e2a\u4e09\u6781\u7ba1\u653e\u5927\u7535\u8def\u3002\u6309\u952e\u6309\u4e0b\u524d，\u7535\u5bb9\u901a\u8fc7\u7535\u963b\u5145\u7535，\u76f4\u5230\u7535\u538b\u63a5\u8fd1\u7535\u6e90\u7535\u538b（VIN）\u3002\u5f53\u6309\u952e\u6309\u4e0b\u65f6，\u7535\u5bb9\u653e\u7535，\u5bfc\u81f4\u4e09\u6781\u7ba1\u5bfc\u901a，\u8fdb\u800c\u5c06MOSFET\u7684\u6805\u6781\u63a5\u5730，\u4f7fMOSFET\u5bfc\u901a，\u7cfb\u7edf\u5f97\u7535\u3002\u7535\u5bb9\u653e\u7535\u8fc7\u7a0b\u4e2d，\u4e09\u6781\u7ba1\u4f9d\u9760\u7cfb\u7edf\u8f93\u51fa\u7684\u7535\u538b\u7ef4\u6301\u5bfc\u901a，\u76f4\u5230\u7535\u5bb9\u5b8c\u5168\u653e\u7535，\u4e09\u6781\u7ba1\u622a\u6b62，MOSFET\u5173\u95ed，\u7cfb\u7edf\u65ad\u7535\u3002<\/p>\n

\u8fd9\u79cd\u7535\u8def\u7684\u5173\u952e\u53c2\u6570\u662fRC\u65f6\u95f4\u5e38\u6570，\u5b83\u51b3\u5b9a\u4e86\u6309\u952e\u6309\u4e0b\u540e\u7cfb\u7edf\u7ef4\u6301\u4f9b\u7535\u7684\u65f6\u95f4\u3002\u901a\u8fc7\u8c03\u6574\u7535\u963b\u548c\u7535\u5bb9\u7684\u503c，\u53ef\u4ee5\u63a7\u5236\u5f00\u673a\u4fdd\u6301\u65f6\u95f4，\u907f\u514d\u56e0\u6309\u952e\u6296\u52a8\u6216\u77ed\u6682\u6309\u538b\u5bfc\u81f4\u7cfb\u7edf\u9891\u7e41\u5f00\u5173\u3002\u5173\u673a\u65f6，\u518d\u6b21\u6309\u4e0b\u6309\u952e\u4f1a\u5207\u65ad\u4e09\u6781\u7ba1\u7684\u57fa\u6781\u7535\u6d41，\u4f7f\u4e09\u6781\u7ba1\u622a\u6b62，MOSFET\u5173\u95ed\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f，\u8fd9\u79cd\u7eaf\u786c\u4ef6\u65b9\u6848\u65e0\u6cd5\u5b9e\u73b0\u590d\u6742\u7684\u5f00\u5173\u673a\u903b\u8f91，\u53ea\u80fd\u5b9e\u73b0\u57fa\u672c\u7684\u5f00\u5173\u529f\u80fd\u3002<\/p>\n

\u6211\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5e38\u7528\u8fd9\u79cd\u7535\u8def\u4f5c\u4e3a\u5e94\u6025\u5f00\u5173\u673a\u65b9\u6848，\u6bd4\u5982\u5728\u7cfb\u7edf\u8f6f\u4ef6\u6b7b\u673a\u65f6，\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u957f\u6309\u786c\u4ef6\u5f00\u5173\u5f3a\u5236\u5173\u673a\u3002\u8bbe\u8ba1\u65f6\u8981\u6ce8\u610f\u9009\u62e9\u4f4e\u6f0f\u7535\u6d41\u7684\u7535\u5bb9\u548c\u9ad8\u653e\u5927\u500d\u6570\u7684\u4e09\u6781\u7ba1，\u4ee5\u51cf\u5c11\u5f85\u673a\u529f\u8017\u548c\u63d0\u9ad8\u7535\u8def\u7075\u654f\u5ea6\u3002\u540c\u65f6，RC\u7535\u8def\u7684\u53c2\u6570\u9700\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u7cbe\u5fc3\u8ba1\u7b97，\u907f\u514d\u56e0\u6e29\u5ea6\u53d8\u5316\u6216\u5143\u4ef6\u8001\u5316\u5bfc\u81f4\u65f6\u95f4\u5e38\u6570\u6f02\u79fb\u3002<\/p>\n

3. \u5173\u952e\u5143\u4ef6\u9009\u578b\u4e0e\u53c2\u6570\u8bbe\u8ba1<\/h3>\n

3.1 MOSFET\u9009\u578b\u4e0e\u9a71\u52a8\u8bbe\u8ba1<\/h4>\n

\u5728\u5f00\u5173\u673a\u7535\u8def\u4e2d，MOSFET\u7684\u9009\u62e9\u81f3\u5173\u91cd\u8981，\u56e0\u4e3a\u5b83\u76f4\u63a5\u8d1f\u8d23\u7535\u6e90\u7684\u901a\u65ad\u63a7\u5236\u3002\u6211\u4e00\u822c\u4f1a\u4f18\u5148\u9009\u62e9P-MOSFET，\u56e0\u4e3a\u5b83\u7684\u5bfc\u901a\u7535\u963b\u5c0f\u3001\u9a71\u52a8\u7b80\u5355，\u9002\u5408\u7528\u5728\u7535\u6e90\u8def\u5f84\u4e0a\u3002\u9009\u578b\u65f6\u8981\u5173\u6ce8\u51e0\u4e2a\u5173\u952e\u53c2\u6570：\u6f0f\u6e90\u7535\u538b（VDS）\u3001\u8fde\u7eed\u6f0f\u6781\u7535\u6d41（ID）\u3001\u5bfc\u901a\u7535\u963b（RDS(on)）\u548c\u6805\u6781\u9608\u503c\u7535\u538b（VGS(th)）\u3002<\/p>\n

VDS\u5fc5\u987b\u5927\u4e8e\u7cfb\u7edf\u6700\u5927\u5de5\u4f5c\u7535\u538b，\u4e00\u822c\u7559\u51fa20%\u7684\u4f59\u91cf\u3002ID\u8981\u5927\u4e8e\u7cfb\u7edf\u6700\u5927\u5de5\u4f5c\u7535\u6d41，\u540c\u6837\u7559\u51fa\u4e00\u5b9a\u4f59\u91cf\u3002RDS(on)\u8d8a\u5c0f\u8d8a\u597d，\u56e0\u4e3a\u5bfc\u901a\u635f\u8017\u548c\u53d1\u70ed\u4e0e\u6b64\u76f4\u63a5\u76f8\u5173\u3002VGS(th)\u51b3\u5b9a\u4e86\u9a71\u52a8\u7535\u538b\u7684\u8981\u6c42，\u4e00\u822c\u9009\u62e9\u9608\u503c\u7535\u538b\u8f83\u4f4e（\u59822V\u4ee5\u4e0b）\u7684MOSFET，\u4fbf\u4e8e\u75283.3V\u62165V\u5355\u7247\u673a\u76f4\u63a5\u9a71\u52a8\u3002\u5982\u679c\u9a71\u52a8\u7535\u538b\u4e0d\u8db3，\u53ef\u80fd\u9700\u8981\u589e\u52a0\u4e09\u6781\u7ba1\u6216\u4e13\u7528\u9a71\u52a8\u82af\u7247\u3002<\/p>\n

\u9a71\u52a8\u7535\u8def\u8bbe\u8ba1\u4e5f\u5f88\u91cd\u8981\u3002\u6211\u4e60\u60ef\u5728MOSFET\u7684\u6805\u6781\u4e32\u8054\u4e00\u4e2a10-100\u03a9\u7684\u7535\u963b，\u7528\u4e8e\u6291\u5236\u632f\u8361\u548c\u51cf\u5c0f\u51b2\u51fb\u7535\u6d41\u3002\u540c\u65f6，\u5728\u6805\u6781\u548c\u6e90\u6781\u4e4b\u95f4\u52a0\u4e00\u4e2a10k-100k\u7684\u7535\u963b，\u786e\u4fddMOSFET\u5728\u4e0d\u786e\u5b9a\u72b6\u6001\u4e0b\u4e0d\u4f1a\u8bef\u5bfc\u901a\u3002\u5bf9\u4e8e\u9ad8\u9891\u5f00\u5173\u5e94\u7528，\u8fd8\u9700\u8981\u8003\u8651\u6805\u6781\u7535\u8377\u548c\u5f00\u5173\u901f\u5ea6，\u4f46\u5f00\u5173\u673a\u7535\u8def\u4e00\u822c\u5bf9\u901f\u5ea6\u8981\u6c42\u4e0d\u9ad8，\u66f4\u5173\u6ce8\u53ef\u9760\u6027\u548c\u529f\u8017\u3002<\/p>\n

3.2 \u7535\u963b\u4e0e\u7535\u5bb9\u7684\u9009\u578b\u8ba1\u7b97<\/h4>\n

\u7535\u963b\u548c\u7535\u5bb9\u662f\u5f00\u5173\u673a\u7535\u8def\u4e2d\u7684\u65e0\u540d\u82f1\u96c4，\u5b83\u4eec\u867d\u7136\u4e0d\u503c\u94b1，\u4f46\u5bf9\u7535\u8def\u6027\u80fd\u5f71\u54cd\u5de8\u5927\u3002\u4e0a\u62c9\u7535\u963b\u7684\u4f5c\u7528\u662f\u786e\u4fdd\u4fe1\u53f7\u7ebf\u5728\u4e0d\u786e\u5b9a\u72b6\u6001\u4e0b\u5904\u4e8e\u5df2\u77e5\u7535\u5e73，\u907f\u514d\u8bef\u89e6\u53d1\u3002\u6211\u4e00\u822c\u9009\u62e910k\u03a9\u4f5c\u4e3a\u4e0a\u62c9\u7535\u963b\u7684\u9ed8\u8ba4\u503c，\u8fd9\u4e2a\u503c\u5728\u529f\u8017\u548c\u9a71\u52a8\u80fd\u529b\u4e4b\u95f4\u53d6\u5f97\u4e86\u826f\u597d\u5e73\u8861\u3002\u5982\u679c\u7cfb\u7edf\u5bf9\u529f\u8017\u6781\u5176\u654f\u611f，\u53ef\u4ee5\u589e\u5927\u5230100k\u03a9\u751a\u81f31M\u03a9，\u4f46\u8981\u6ce8\u610f\u6297\u5e72\u6270\u80fd\u529b\u4f1a\u4e0b\u964d\u3002<\/p>\n

\u4e0b\u62c9\u7535\u963b\u7528\u4e8e\u5728\u6309\u952e\u677e\u5f00\u65f6\u5c06\u6805\u6781\u62c9\u5230\u5730，\u9632\u6b62MOSFET\u56e0\u6d6e\u7a7a\u800c\u8bef\u5bfc\u901a\u3002\u4e0b\u62c9\u7535\u963b\u7684\u503c\u901a\u5e38\u6bd4\u4e0a\u62c9\u7535\u963b\u5c0f，\u4e00\u822c\u53d61k-10k\u03a9，\u4ee5\u786e\u4fdd\u80fd\u591f\u5feb\u901f\u653e\u7535\u3002\u7535\u5bb9\u4e3b\u8981\u7528\u4e8e\u5ef6\u65f6\u548c\u6ee4\u6ce2，\u5f00\u5173\u673a\u7535\u8def\u4e2d\u5e38\u7528\u7684\u662f0.1\u03bcF-10\u03bcF\u7684\u9676\u74f7\u7535\u5bb9\u6216\u7535\u89e3\u7535\u5bb9\u3002RC\u65f6\u95f4\u5e38\u6570\u7684\u8ba1\u7b97\u516c\u5f0f\u662f\u03c4 = R \u00d7 C，\u6bd4\u598210k\u7535\u963b\u548c10\u03bcF\u7535\u5bb9\u7ec4\u6210\u7684\u65f6\u95f4\u5e38\u6570\u662f0.1\u79d2，\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7684\u5ef6\u65f6\u65f6\u95f4\u8c03\u6574\u53c2\u6570\u3002<\/p>\n

\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d，\u6211\u901a\u5e38\u4f1a\u5148\u7528\u8ba1\u7b97\u503c，\u7136\u540e\u901a\u8fc7\u5b9e\u9a8c\u5fae\u8c03\u3002\u6bd4\u5982\u8f6f\u4ef6\u5f00\u5173\u673a\u7535\u8def\u4e2d\u7684\u6309\u952e\u68c0\u6d4b\u5ef6\u65f6，\u4e00\u822c\u8bbe\u7f6e\u4e3a20-50ms，\u65e2\u80fd\u6ee4\u9664\u6296\u52a8\u53c8\u4e0d\u4f1a\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002\u786c\u4ef6\u7535\u8def\u4e2d\u7684\u4fdd\u6301\u65f6\u95f4\u901a\u5e38\u8bbe\u4e3a1-5\u79d2，\u4fdd\u8bc1\u7cfb\u7edf\u6709\u8db3\u591f\u65f6\u95f4\u542f\u52a8\u5e76\u63a5\u7ba1\u63a7\u5236\u3002\u6240\u6709\u7535\u963b\u5e94\u9009\u62e91%\u7cbe\u5ea6\u7684\u91d1\u5c5e\u819c\u7535\u963b，\u7535\u5bb9\u5e94\u9009\u62e9X5R\u6216X7R\u6750\u8d28\u7684\u9676\u74f7\u7535\u5bb9，\u6e29\u5ea6\u7279\u6027\u8f83\u597d\u3002<\/p>\n

4. \u5b9e\u9645\u8bbe\u8ba1\u4e2d\u7684\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848<\/h3>\n

4.1 \u529f\u8017\u63a7\u5236\u4e0e\u5f85\u673a\u4f18\u5316<\/h4>\n

\u5f00\u5173\u673a\u7535\u8def\u7684\u5f85\u673a\u529f\u8017\u662f\u5f88\u591a\u5de5\u7a0b\u5e08\u5934\u75bc\u7684\u95ee\u9898，\u7279\u522b\u662f\u7535\u6c60\u4f9b\u7535\u7684\u8bbe\u5907\u3002\u6211\u66fe\u7ecf\u5728\u4e00\u4e2a\u7269\u8054\u7f51\u9879\u76ee\u4e2d，\u56e0\u4e3a\u5ffd\u7565\u4e86\u4e00\u4e2a\u4e0a\u62c9\u7535\u963b\u7684\u529f\u8017，\u5bfc\u81f4\u5f85\u673a\u65f6\u95f4\u7f29\u77ed\u4e8630%\u3002\u540e\u6765\u901a\u8fc7\u4ed4\u7ec6\u8ba1\u7b97\u548c\u6d4b\u91cf，\u624d\u53d1\u73b0\u662f100k\u4e0a\u62c9\u7535\u963b\u57283.3V\u7cfb\u7edf\u4e2d\u670933\u03bcA\u7684\u7535\u6d41，\u5bf9\u4e8e\u8981\u6c42\u5f85\u673a\u7535\u6d41\u5c0f\u4e8e10\u03bcA\u7684\u7cfb\u7edf\u6765\u8bf4\u8fd9\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6cd5\u662f\u591a\u65b9\u9762\u7684\u3002\u9996\u5148\u53ef\u4ee5\u9009\u62e9\u66f4\u5927\u963b\u503c\u7684\u4e0a\u62c9\u7535\u963b，\u6bd4\u59821M\u03a9，\u8fd9\u6837\u7535\u6d41\u5c31\u964d\u52303.3\u03bcA\u3002\u4f46\u8981\u6ce8\u610f\u7535\u963b\u592a\u5927\u4f1a\u964d\u4f4e\u6297\u5e72\u6270\u80fd\u529b，\u9700\u8981\u5728PCB\u5e03\u5c40\u65f6\u8ba9\u7535\u963b\u5c3d\u91cf\u9760\u8fd1MOSFET\u6805\u6781，\u51cf\u5c11\u5929\u7ebf\u6548\u5e94\u3002\u5176\u6b21\u53ef\u4ee5\u8003\u8651\u5728\u5f85\u673a\u65f6\u5b8c\u5168\u65ad\u5f00\u4e0d\u5fc5\u8981\u7684\u7535\u8def，\u6bd4\u5982\u7528MOSFET\u4f5c\u4e3a\u7535\u6e90\u5f00\u5173，\u800c\u4e0d\u662f\u59cb\u7ec8\u4f9b\u7535\u7684LDO\u3002<\/p>\n

\u53e6\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\u662f\u6f0f\u7535\u6d41\u3002MOSFET\u5373\u4f7f\u5728\u5173\u65ad\u72b6\u6001\u4e0b\u4e5f\u6709\u5fae\u5c0f\u6f0f\u7535\u6d41，\u7279\u522b\u662f\u9ad8\u6e29\u73af\u5883\u4e0b\u3002\u9009\u62e9\u4f4e\u6f0f\u7535\u6d41\u7684MOSFET（\u6bd4\u5982\u5c0f\u4e8e1\u03bcA）\u5f88\u91cd\u8981\u3002\u7535\u5bb9\u4e5f\u4f1a\u4ea7\u751f\u6f0f\u7535\u6d41，\u7279\u522b\u662f\u7535\u89e3\u7535\u5bb9，\u56e0\u6b64\u5728\u9ad8\u8981\u6c42\u573a\u5408\u5e94\u8be5\u4f7f\u7528\u9676\u74f7\u7535\u5bb9\u6216\u8584\u819c\u7535\u5bb9\u3002\u6211\u4e60\u60ef\u5728\u8bbe\u8ba1\u5b8c\u6210\u540e\u7528\u7535\u6d41\u8868\u5b9e\u9645\u6d4b\u91cf\u5f85\u673a\u529f\u8017，\u786e\u4fdd\u8fbe\u5230\u9884\u671f\u76ee\u6807\u3002<\/p>\n

4.2 \u7a33\u5b9a\u6027\u4e0e\u6297\u5e72\u6270\u8bbe\u8ba1<\/h4>\n

\u5f00\u5173\u673a\u7535\u8def\u7684\u7a33\u5b9a\u6027\u76f4\u63a5\u5173\u7cfb\u5230\u7528\u6237\u4f53\u9a8c，\u8c01\u90fd\u4e0d\u5e0c\u671b\u81ea\u5df1\u7684\u8bbe\u5907\u83ab\u540d\u5176\u5999\u5173\u673a\u6216\u65e0\u6cd5\u5f00\u673a\u3002\u5f71\u54cd\u7a33\u5b9a\u6027\u7684\u56e0\u7d20\u5f88\u591a，\u5305\u62ec\u7535\u6e90\u566a\u58f0\u3001ESD\u3001\u6e29\u5ea6\u53d8\u5316\u548c\u5143\u4ef6\u8001\u5316\u7b49\u3002\u6211\u5728\u8bbe\u8ba1\u65f6\u901a\u5e38\u4f1a\u91c7\u53d6\u591a\u91cd\u4fdd\u62a4\u63aa\u65bd\u3002<\/p>\n

\u9996\u5148\u662f\u7535\u6e90\u53bb\u8026，\u5728\u6bcf\u4e2aIC\u7684\u7535\u6e90\u5f15\u811a\u9644\u8fd1\u653e\u7f6e0.1\u03bcF\u548c10\u03bcF\u7535\u5bb9，\u6ee4\u9664\u9ad8\u9891\u548c\u4f4e\u9891\u566a\u58f0\u3002\u5176\u6b21\u662fESD\u4fdd\u62a4，\u5728\u6309\u952e\u548c\u63a5\u53e3\u5904\u6dfb\u52a0TVS\u7ba1\u6216ESD\u4fdd\u62a4\u4e8c\u6781\u7ba1，\u9632\u6b62\u9759\u7535\u635f\u574f\u3002\u5bf9\u4e8e\u6e29\u5ea6\u5f71\u54cd，\u9009\u62e9\u6e29\u5ea6\u7cfb\u6570\u5c0f\u7684\u5143\u4ef6，\u5982\u91d1\u5c5e\u819c\u7535\u963b\u548cX7R\u7535\u5bb9，\u5e76\u5728\u6781\u7aef\u6e29\u5ea6\u73af\u5883\u4e0b\u6d4b\u8bd5\u7535\u8def\u6027\u80fd\u3002<\/p>\n

\u8f6f\u4ef6\u65b9\u9762\u4e5f\u9700\u8981\u8003\u8651\u7a33\u5b9a\u6027\u3002\u6bd4\u5982\u6309\u952e\u68c0\u6d4b\u8981\u6709\u53bb\u6296\u7b97\u6cd5，\u901a\u5e38\u91c7\u7528\u8f6f\u4ef6\u5ef6\u65f6\u6216\u786c\u4ef6RC\u6ee4\u6ce2\u7ed3\u5408\u8f6f\u4ef6\u786e\u8ba4\u7684\u65b9\u5f0f\u3002\u5f00\u5173\u673a\u903b\u8f91\u8981\u6709\u8d85\u65f6\u673a\u5236，\u9632\u6b62\u957f\u6309\u6309\u952e\u5bfc\u81f4\u7cfb\u7edf\u5f02\u5e38\u3002\u6211\u8fd8\u4f1a\u6dfb\u52a0\u770b\u95e8\u72d7\u5b9a\u65f6\u5668，\u5728\u7cfb\u7edf\u6b7b\u673a\u65f6\u81ea\u52a8\u590d\u4f4d\u3002\u8fd9\u4e9b\u63aa\u65bd\u770b\u4f3c\u7b80\u5355，\u4f46\u80fd\u6781\u5927\u63d0\u9ad8\u7cfb\u7edf\u53ef\u9760\u6027\u3002<\/p>\n

5. \u5b9e\u6218\u6848\u4f8b：\u4f4e\u529f\u8017\u7269\u8054\u7f51\u8bbe\u5907\u7684\u5f00\u5173\u673a\u7535\u8def\u8bbe\u8ba1<\/h3>\n

\u8ba9\u6211\u5206\u4eab\u4e00\u4e2a\u5b9e\u9645\u9879\u76ee\u4e2d\u7684\u6848\u4f8b\u2014\u2014\u4e00\u6b3e\u57fa\u4e8e\u7535\u6c60\u4f9b\u7535\u7684\u7269\u8054\u7f51\u4f20\u611f\u5668\u8bbe\u5907\u3002\u8fd9\u4e2a\u8bbe\u5907\u8981\u6c42\u5f85\u673a\u7535\u6d41\u5c0f\u4e8e5\u03bcA，\u5de5\u4f5c\u65f6\u95f4\u81f3\u5c111\u5e74，\u540c\u65f6\u652f\u6301\u6309\u952e\u5f00\u5173\u673a\u548c\u8fdc\u7a0b\u5524\u9192\u529f\u80fd\u3002\u7ecf\u8fc7\u591a\u6b21\u8fed\u4ee3，\u6211\u6700\u7ec8\u9009\u62e9\u4e86\u8f6f\u786c\u4ef6\u7ed3\u5408\u7684\u65b9\u6848\u3002<\/p>\n

\u786c\u4ef6\u90e8\u5206\u4f7f\u7528\u4e00\u4e2a\u4f4eVgs(th)\u7684P-MOSFET（SI2301）\u4f5c\u4e3a\u4e3b\u5f00\u5173，\u6805\u6781\u901a\u8fc7\u4e00\u4e2a100k\u7535\u963b\u4e0a\u62c9\u52303.3V，\u4e00\u4e2a1M\u7535\u963b\u4f5c\u4e3a\u4e0b\u62c9\u3002\u6309\u952e\u76f4\u63a5\u8fde\u63a5MOSFET\u6805\u6781\u548c\u5730，\u540c\u65f6\u901a\u8fc7\u4e00\u4e2a100k\u7535\u963b\u8fde\u63a5\u5230\u5355\u7247\u673a\u7684\u8f93\u5165\u53e3\u3002\u7535\u5bb9\u9009\u62e91\u03bcF\u7684X7R\u9676\u74f7\u7535\u5bb9，\u7528\u4e8e\u8f6f\u4ef6\u53bb\u6296\u548c\u5ef6\u65f6\u3002<\/p>\n

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