{"id":70,"date":"2016-04-03T22:48:07","date_gmt":"2016-04-03T22:48:07","guid":{"rendered":""},"modified":"2016-04-04T06:48:29","modified_gmt":"2016-04-03T22:48:29","slug":"%e9%9d%9e%e9%9a%94%e7%a6%bbled%e9%a9%b1%e5%8a%a8%e7%94%b5%e6%ba%90%e6%9e%b6%e6%9e%84%e7%94%b5%e6%84%9f%e7%9a%84%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=70","title":{"rendered":"\u975e\u9694\u79bbLED\u9a71\u52a8\u7535\u6e90\u67b6\u6784\u7535\u611f\u7684\u8bbe\u8ba1"},"content":{"rendered":"

\u901a\u8fc7\u7535\u611f\u4e2d\u9700\u8981\u7684LED\u7684\u7eb9\u6ce2\u7535\u6d41\u6765\u786e\u5b9a\u7535\u611f\u91cf\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u7eb9\u6ce2\u7535\u6d41\u662fLED\u6709\u6548\u7535\u6d41\u768430\uff05\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cLED\u7684\u7535\u6d41\u6709\u6548\u503c\u4e3a350mA\u3002
\n 
\n\u4e0b\u4e00\u6b65\u662f\u786e\u5b9aLED\u8d1f\u8f7d\u7684\u538b\u964d\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5f53\u8d1f\u8f7d\u4e3a10\u9897LED\u4e00\u4e32\uff0c\u6bcf\u9897LED\u5728\u989d\u5b9a\u7535\u6d41\u4e0b\u7684\u538b\u964d\u4e3a3.0V\uff0c\u90a3\u4e48\u603b\u5171\u7684LED\u538b\u964d\u4e3a30V\u3002
\n 
\n\u73b0\u5728\u77e5\u9053\u88ab\u8c03\u6574\u540e\u7684\u8f93\u5165\u5de5\u4f5c\u7535\u538b\uff1aVIN= 120V*1.41=169V\uff0c\u90a3\u4e48\u5f00\u5173\u8109\u51b2\u5360\u7a7a\u6bd4\u767e\u5206\u6bd4\u53ef\u786e\u5b9a\uff1a
\nD=VLEDs\/ Vin =30\/169=0.177
\n\u7136\u540e\uff0c\u9700\u8981\u77e5\u9053\u5f00\u5173\u9891\u7387\uff0c\u5728\u672c\u4f8b\u4e2dfosc\uff1d50 KHz\uff0c\u90a3\u4e48\uff0cMOS\u7684\u5f00\u901a\u65f6\u95f4\u53ef\u4ee5\u8ba1\u7b97\u51fa\u6765\uff1a
\nTON=D\/fosc=3.5ms
\n\u6700\u540e\u7535\u611f\u503c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u7684\u7b97\u5f0f\u5f97\u5230\uff1a
\nL=( VIN - VLEDs)* TON \/(0.3* ILED)=4.6 mH
\n 
\n\u786e\u5b9a\u8f93\u5165\u5927\u7535\u5bb9
\n\u5b89\u653e\u4e00\u4e2a\u8f93\u5165\u7684\u6ee4\u6ce2\u7535\u5bb9\u662f\u4e3a\u4e86\u9632\u6b62AC\u56de\u8def\u7535\u538b\u9ad8\u4e8e\u4e24\u500dLED\u8d1f\u8f7d\u7535\u538b\uff0c\u8003\u8651\u5230\u901a\u8fc7\u7535\u5bb9\u670915\uff05\u7684\u7535\u538b\u7eb9\u6ce2\uff0c\u8f93\u5165\u7535\u5bb9\u7684\u6700\u5c0f\u503c\u53ef\u901a\u8fc7\u5982\u4e0b\u7684\u7b80\u5355\u8ba1\u7b97\u5f97\u51fa\uff1a
\nCMIN=ILED* V LEDs*0.06\/ VIN\uff3e2=22uF
\n\u5728\u8fd9\u91cc\u5c31\u53ef\u4ee5\u4f7f\u752822uF\/250V\u7684\u7535\u5bb9\u3002
\n 
\n\u5728\u56fe\u4e00\u7535\u8def\u7684\u88ab\u52a8PFC\u7535\u8def\u4e2dCMIN\u7684\u5904\u7528\u5230\u4e24\u4e2a\u4e32\u8054\u7684\u7535\u5bb9\u3002\u8fd9\u4e24\u4e2a\u4e00\u6837\u7684\u7535\u5bb9\u7535\u538b\u53ef\u4e3a\u8f93\u5165\u7535\u538b\u7684\u4e00\u534a\uff0c\u5bb9\u91cf\u662f\u8f93\u5165\u7535\u5bb9\u5bb9\u91cf\u7684\u4e24\u500d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u901a\u8fc7\u7535\u611f\u4e2d\u9700\u8981\u7684LED\u7684\u7eb9\u6ce2\u7535\u6d41\u6765\u786e\u5b9a\u7535\u611f\u91cf\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u7eb9\u6ce2\u7535\u6d41\u662fLED\u6709\u6548\u7535\u6d41\u768430\uff05\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cLED\u7684\u7535\u6d41\u6709\u6548\u503c\u4e3a350mA\u3002 \u4e0b\u4e00\u6b65\u662f\u786e\u5b9aLED\u8d1f\u8f7d\u7684\u538b\u964d\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5f53\u8d1f\u8f7d\u4e3a<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/70"}],"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=70"}],"version-history":[{"count":0,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/70\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=70"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=70"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}