{"id":10906,"date":"2022-12-23T17:33:52","date_gmt":"2022-12-23T09:33:52","guid":{"rendered":"http:\/\/www.szryc.com\/?p=10906"},"modified":"2022-12-23T17:33:52","modified_gmt":"2022-12-23T09:33:52","slug":"%e5%bc%80%e5%85%b3%e7%94%b5%e6%ba%90%e7%9a%84%e7%94%b5%e5%8e%8b%e5%8f%8d%e9%a6%88%e7%94%b5%e8%b7%af%ef%bc%8ctl431%e9%85%8d%e5%90%88%e5%85%89%e8%80%a6%e5%ae%9e%e4%be%8b%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=10906","title":{"rendered":"\u5f00\u5173\u7535\u6e90\u7684\u7535\u538b\u53cd\u9988\u7535\u8def\uff0cTL431\u914d\u5408\u5149\u8026\u5b9e\u4f8b\u8bbe\u8ba1"},"content":{"rendered":"

\u5f97\u76ca\u4e8e\u534a\u5bfc\u4f53<\/u>\u5de5\u4e1a<\/u>\u7684\u53d1\u5c55\uff0c\u5f00\u5173\u7535\u6e90<\/u>\u5e94\u7528\u8303\u56f4\u5df2\u7ecf\u975e\u5e38\u5e7f\u6cdb\u4e86\u3002<\/p>\n

\u4ece\u6211\u4eec\u8eab\u8fb9\u7684\u624b\u673a<\/u>\u5145\u7535\u5668\uff0c\u5230\u821e\u53f0\u706f\u5177\uff0c\u518d\u5230\u822a\u7a7a\u822a\u5929\uff0c\u90fd\u53ef\u4ee5\u770b\u5230\u5f00\u5173\u7535\u6e90\u7684\u8eab\u5f71\u3002<\/p>\n

\u5f00\u5173<\/p>\n

\u4e0d\u79ef\u8dec\u6b65\uff0c\u65e0\u4ee5\u81f3\u5343\u91cc\uff1b\u4e0d\u79ef\u5c0f\u6d41\uff0c\u65e0\u4ee5\u6210\u6c5f\u6d77\uff01<\/p>\n

\u65e9\u4e9b\u65f6\u5019\u4f5c\u8005\u5df2\u7ecf\u548c\u5927\u5bb6\u5206\u4eab\u4e86\u5149\u8026<\/u>\u548cTL431\u7684\u57fa\u7840\u77e5\u8bc6\uff0c\u8fd9\u6b21\u5c31\u4ee5\u8fd9\u4e24\u4e2a\u7535\u5b50\u5143\u5668\u4ef6<\/u>\u548c\u5927\u5bb6\u5206\u4eab\u4e00\u4e0b\u5f00\u5173\u7535\u6e90\u7684\u7535\u538b\u53cd\u9988\u7535\u8def<\/p>\n

\u5148\u770b\u4e00\u4e0b\u6574\u4f53\u7535\u8def<\/p>\n

\"b1c60e8c-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u5f00\u5173\u7535\u6e90\u6574\u4f53\u7535\u8def<\/p>\n

\u5f71\u54cd\u7535\u538b\u53cd\u9988\u7684\u7535\u5b50<\/u>\u5143\u5668\u4ef6\u5df2\u7ecf\u7528\u7ea2\u8272\u7b26\u53f7\u6807\u51fa\uff0c\u7535\u8def\u5df2\u7ecf\u4f7f\u7528\u7ea2\u8272\u7ebf\u6807\u51fa<\/p>\n

\u7535\u538b\u53cd\u9988\u90e8\u5206<\/p>\n

\"b1ec4188-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u7535\u538b\u53cd\u9988\u90e8\u5206<\/p>\n

\u5728\u5206\u6790\u7535\u8def\u524d\u9700\u8981\u6ce8\u610f\u7684\u5173\u952e\u70b9<\/p>\n

1.\u5149\u8026\u7684\u8f93\u5165\u7aef\uff08\u4e8c\u6781\u7ba1<\/u>\u7aef\uff09\u7684\u7535\u6d41<\/u>\u589e\u5927\u4f1a\u81f4\u4f7f\u8f93\u51fa\u7aef\u5bfc\u901a\u7a0b\u5ea6\u589e\u5927\uff08\u65e2\u6d41\u8fc7\u7684\u7535\u6d41\u589e\u5927\uff09<\/p>\n

2.\u5149\u8026\u7684\u8f93\u5165\u548c\u8f93\u51fa\u7aef\u7684\u7535\u6d41\u9075\u5faa\u6bd4\u503c\uff08\u5149\u8026\u7684CTR\uff09<\/p>\n

3.\u8f93\u5165TL431\u7684\u53c2\u8003\u6781REF\u7684\u7535\u538b\u589e\u5927\uff0cK\u6781\u5230A\u6781\u5bfc\u901a\u7a0b\u5ea6\u4f1a\u589e\u5927<\/p>\n

\u5f00\u59cb\u5206\u6790\u7535\u8def\u5566<\/p>\n

\u4ece\u4e0a\u9762\u7684\u5173\u952e\u70b9\u91cc\u6211\u4eec\u77e5\u9053\uff0c\u53ea\u8981\u53c2\u8003\u6781\u7684\u7535\u538b\u5347\u9ad8\uff0cTL431\u7684K\u6781\u5230A\u6781\u7684\u5bfc\u901a\u7535\u6d41\u5c31\u4f1a\u589e\u5927<\/p>\n

\"b207e5be-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u7535\u6d41\u589e\u5927<\/p>\n

\u4ece\u7535\u8def\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u7535\u963bR1\u548c\u5149\u8026PC817\u7684\u8f93\u5165\u7aef\u4e32\u8054\u540e\u548cR5\u5e76\u8054\uff0c\u518d\u548cTL431\u4e32\u8054<\/p>\n

TL431\u7684\u5bfc\u901a\u7535\u6d41\u589e\u5927\uff0c\u5149\u8026\u8f93\u5165\u7aef\u7535\u6d41\u4e5f\u4f1a\u589e\u5927\uff0c\u8f93\u51fa\u7aef\u7535\u6d41\u589e\u5927\uff0cR4\u7535\u538b\u589e\u5927\uff0cPWM\u5360\u7a7a\u6bd4\u964d\u4f4e<\/p>\n

\"b2193846-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u5149\u8026\u5bfc\u901a\u7a0b\u5ea6\u589e\u5927<\/p>\n

\u53cd\u4e4b\u8f93\u51fa\u7535\u538b\u4f4e\u4e8e\u8bbe\u5b9a\u7535\u538b\uff0c\u5149\u8026\u5bfc\u901a\u7a0b\u5ea6\u964d\u4f4e\uff0cUC3842\u5c31\u4f1a\u63d0\u9ad8PWM\u5360\u7a7a\u6bd4<\/p>\n

\u53ea\u5206\u6790\u539f\u7406\u6709\u4ec0\u4e48\u7528\uff1f\u5b9e\u9645\u4e0a\u5143\u5668\u4ef6\u600e\u4e48\u9009\u503c\u5462\uff1f<\/p>\n

\u540c\u5b66\u4eec\u80af\u5b9a\u5f88\u60f3\u77e5\u9053\u5177\u4f53\u7684\u53c2\u6570\u503c\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u8ba1\u7b97\u4e00\u4e0b\u5427<\/p>\n

\u5047\u5b9a\u5f00\u5173\u7535\u6e90\u8f93\u51fa\u7535\u538bVout= 12V<\/p>\n

\"b2384510-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u7535\u8def\u56fe<\/p>\n

1.\u8ba1\u7b97R2\u548cR3\u7684\u963b\u503c<\/p>\n

\"b24cd5e8-828a-11ed-8abf-dac502259ad0\"<\/p>\n

TL431\u5178\u578b\u7535\u8def<\/p>\n

\u7ec6\u5fc3\u7684\u540c\u5b66\u53ef\u80fd\u4f1a\u53d1\u73b0\u5728\u53cd\u9988\u7535\u8def\u4e2d\u627e\u4e0d\u5230\u56fe\u4e2d\u5708\u51fa\u7684R\u7684\u8eab\u5f71<\/p>\n

\u5176\u5b9eR\u5df2\u7ecf\u53d8\u6210\u53d8\u538b\u5668\u6b21\u7ea7\u7684\u7ed5\u7ec4\u4e86\uff08\u53d8\u538b\u5668\u53ef\u4ee5\u5b9e\u73b0\u963b\u6297\u5339\u914d\uff09<\/p>\n

\"b2696442-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u7535\u8def\u53d8\u6210\u8fd9\u6837\u4e86<\/p>\n

\u6211\u4eec\u53ea\u9700\u8981\u8ba9TL431\u7684\u53c2\u8003\u6781\u8f93\u5165\u7535\u538b\u4e3a2.5V\u5c31\u597d\u4e86<\/p>\n

\u5047\u5982R3\u4e3a1K\u6839\u636e\u516c\u5f0f\u53ef\u4ee5\u8ba1\u7b97\u5f97R2\u7b49\u4e8e3.8KR<\/p>\n

2.\u8bbe\u5b9a\u6d41\u8fc7\u5149\u8026PC817\u7684\u7535\u6d41\uff0c\u8ba1\u7b97R1<\/p>\n

\"b282bea6-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u5149\u8026\u8f93\u5165\u7535\u6d41IF\u548c\u7535\u6d41\u4f20\u8f93\u6bd4\u7684\u66f2\u7ebf\u56fe<\/p>\n

\u4ece\u66f2\u7ebf\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u5149\u8026\u7684CTR\u5728IF\u4e3a5~20mA\u65f6\u662f\u6bd4\u8f83\u5e73\u7f13\u7684<\/p>\n

\u6211\u4eec\u4ece\u4e2d\u9009\u62e9\u4e00\u4e2a\u7535\u6d41\uff0c\u6bd4\u5982IF = 10mA<\/p>\n

\"b29e2b3c-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u5149\u8026\u7684\u4e8c\u6781\u7ba1\u538b\u964d<\/p>\n

\u7535\u963bR1\u7684\u8ba1\u7b97\u9700\u7b26\u5408\u516c\u5f0fR1 <= (Vout - VF - Vref) \/ IF<\/p>\n

\u56e0\u4e3a\u7535\u963bR1\u6240\u5206\u5230\u7684\u7535\u538b\u52a0\u4e0a\u5149\u8026\u538b\u964d(1.2V)\u548cTL431\u6700\u5c0f\u8f93\u51fa\u7535\u538b(2.5V)\u4e0d\u53ef\u80fd\u5927\u4e8e\u8f93\u51fa\u7535\u538b\uff0c\u5426\u5219\u5149\u8026\u7535\u6d41IF\u5c06\u4e0b\u964d<\/p>\n

\u8ba1\u7b97R1\u9700\u5c0f\u4e8e\u7b49\u4e8e830\u03a9\uff0c\u6240\u4ee5R1\u53d6510\u03a9<\/p>\n

3.\u8ba1\u7b97R5<\/p>\n

\u5047\u5982\u5149\u8026\u4e0d\u5de5\u4f5c\u65f6(\u5149\u8026\u6ca1\u6709\u7535\u6d41\u65f6)\uff0c\u4e3a\u4f7fTL431\u6b63\u5e38\u5de5\u4f5c\uff0cTL431\u6700\u5c0f\u9700\u8981\u6d41\u8fc71mA\u7535\u6d41<\/p>\n

\"b2c5ae46-828a-11ed-8abf-dac502259ad0\"<\/p>\n

R5\u4e24\u7aef\u7535\u538b\u4e3a6.3V\uff0c\u6240\u4ee5R5\u9700\u5c0f\u4e8e6.3K\u03a9\uff0cR5\u53d64.7K\u03a9<\/p>\n

4.\u6839\u636e\u5f00\u5173\u7535\u6e90\u82af\u7247<\/u>\u8ba1\u7b97R4<\/p>\n

\"b2dd7f62-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u5f00\u5173\u7535\u6e90\u82af\u7247UC3842\u5185\u90e8\u7535\u8def<\/p>\n

\u901a\u8fc7\u82af\u7247\u5185\u90e8\u7535\u8def\u53ef\u4ee5\u770b\u5230\uff0cVFB\u811a\u7684\u8f93\u5165\u7535\u538b\u662f\u548c2.5V\u8fdb\u884c\u6bd4\u8f83\u7684<\/p>\n

\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8ba9VFB\u7684\u8f93\u5165\u7535\u538b\u662f2.5V<\/p>\n

\u6211\u4eec\u77e5\u9053PC817-A\u5149\u8026\u7684IF\u572810mA\u65f6\uff0cCTR\u5927\u7ea6\u662f130\uff0c\u6240\u4ee5\u5149\u8026\u7684\u8f93\u51fa\u7aef\u7684\u7535\u6d41\u662f13mA<\/p>\n

2.5V\/0.013A = 192\u03a9\uff0c\u6240\u4ee5R4 = 192\u03a9<\/p>\n

\"b364b9e6-828a-11ed-8abf-dac502259ad0\"<\/p>\n

\u8ba1\u7b97\u7ed3\u679c<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5f97\u76ca\u4e8e\u534a\u5bfc\u4f53\u5de5\u4e1a\u7684\u53d1\u5c55\uff0c\u5f00\u5173\u7535\u6e90\u5e94\u7528\u8303\u56f4\u5df2\u7ecf\u975e\u5e38\u5e7f\u6cdb\u4e86\u3002 \u4ece\u6211\u4eec\u8eab\u8fb9\u7684\u624b\u673a\u5145\u7535\u5668\uff0c\u5230\u821e\u53f0\u706f\u5177\uff0c\u518d\u5230\u822a\u7a7a\u822a\u5929\uff0c\u90fd […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/10906"}],"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=10906"}],"version-history":[{"count":1,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/10906\/revisions"}],"predecessor-version":[{"id":10920,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/10906\/revisions\/10920"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10906"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}