{"id":2866,"date":"2019-10-29T10:05:57","date_gmt":"2019-10-29T10:05:57","guid":{"rendered":""},"modified":"2019-10-29T18:06:22","modified_gmt":"2019-10-29T10:06:22","slug":"%e5%9f%ba%e4%ba%8epfc%e5%8a%9f%e8%83%bd%e7%9a%84%e5%ae%a4%e5%a4%96led%e8%b7%af%e7%81%af%e7%94%b5%e6%ba%90%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2866","title":{"rendered":"\u57fa\u4e8ePFC\u529f\u80fd\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\u8bbe\u8ba1"},"content":{"rendered":"

\n\t0 \u5f15\u8a00<\/p>\n

\n\tLED<\/u>\u8def\u706f\u662f\u4f4e\u7535\u538b\u3001\u5927\u7535\u6d41<\/u>\u7684\u9a71\u52a8\u5668\u4ef6\uff0c\u5176\u53d1\u5149\u7684\u5f3a\u5ea6\u7531\u6d41\u8fc7LED\u7684\u7535\u6d41\u51b3\u5b9a\uff0c\u7535\u6d41\u8fc7\u5f3a\u4f1a\u5f15\u8d77LED\u7684\u8870\u51cf\uff0c\u7535\u6d41\u8fc7\u5f31\u4f1a\u5f71\u54cdLED\u7684\u53d1\u5149\u5f3a\u5ea6\uff0c\u56e0\u6b64LED\u7684\u9a71\u52a8\u9700\u8981\u63d0\u4f9b\u6052\u6d41\u7535\u6e90\uff0c\u4ee5\u4fdd\u8bc1\u5927\u529f\u7387LED\u4f7f\u7528\u7684\u5b89\u5168\u6027\uff0c\u540c\u65f6\u8fbe\u5230\u7406\u60f3\u7684\u53d1\u5149\u5f3a\u5ea6\u3002\u7528\u5e02\u7535\u9a71\u52a8\u5927\u529f\u7387LED\u9700\u8981\u89e3\u51b3\u964d\u538b\u3001\u9694\u79bb\u3001PFC<\/u>(\u529f\u7387\u56e0\u7d20\u6821\u6b63)\u548c\u6052\u6d41\u95ee\u9898\uff0c\u8fd8\u9700\u6709\u6bd4\u8f83\u9ad8\u7684\u8f6c\u6362\u6548\u7387\uff0c\u6709\u8f83\u5c0f\u7684\u4f53\u79ef\uff0c\u80fd\u957f\u65f6\u95f4\u5de5\u4f5c\uff0c\u6613\u6563\u70ed\uff0c\u4f4e\u6210\u672c\uff0c\u6297\u7535\u78c1\u5e72\u6270\uff0c\u548c\u8fc7\u6e29\u3001\u8fc7\u6d41\u3001\u77ed\u8def<\/u>\u3001\u5f00\u8def<\/u>\u4fdd\u62a4\u7b49\u3002\u65b9\u6848\u91c7\u7528\u6709\u6e90PFC\u529f\u80fd\u7535\u8def<\/u>\u8bbe\u8ba1\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\uff0c\u5185\u7f6e\u5b8c\u6574\u7684EMC<\/u>\u7535\u8def\u548c\u9ad8\u6548\u9632\u96f7\u7535\u8def\uff0c\u7b26\u5408\u5b89\u89c4\u548c\u7535\u78c1\u517c\u5bb9\u7684\u8981\u6c42\u3002\u6700\u540e\u6d4b\u8bd5<\/u>\u7ed3\u679c\u4e5f\u8868\u660e\uff0c\u672c\u65b9\u6848\u6240\u8bbe\u8ba1\u7684PFC\u5f00\u5173\u7535\u6e90<\/u>\u6027\u80fd\u826f\u597d\u3001\u53ef\u9760\u3001\u7ecf\u6d4e\u5b9e\u60e0\u4e14\u6548\u7387\u9ad8\uff0c\u5728LED\u8def\u706f\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u53d6\u5f97\u6ee1\u610f\u7684\u6548\u679c\u3002<\/p>\n

\n\t <\/div>\n

\n\t1 \u7cfb\u7edf\u603b\u4f53\u6846\u56fe<\/p>\n

\n\t\u91c7\u7528\u9694\u79bb\u53d8\u538b\u5668<\/u>\u3001PFC\u63a7\u5236\u5b9e\u73b0\u7684\u5f00\u5173<\/u>\u7535\u6e90\uff0c\u8f93\u51fa\u6052\u538b\u6052\u6d41\u7684\u7535\u538b\uff0c\u9a71\u52a8LED\u8def\u706f\u3002\u7535\u8def\u7684\u603b\u4f53\u6846\u56fe\u5982\u56fe1\u6240\u793a\u3002<\/p>\n

\n\t\"\u57fa\u4e8ePFC\u529f\u80fd\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\u8bbe\u8ba1\"<\/p>\n

\n\tLED\u6297\u6d6a\u6d8c\u7684\u80fd\u529b\u662f\u6bd4\u8f83\u5dee\u7684\uff0c\u7279\u522b\u662f\u6297\u53cd\u5411\u7535\u538b\u80fd\u529b\u3002\u52a0\u5f3a\u8fd9\u65b9\u9762\u7684\u4fdd\u62a4\u4e5f\u5f88\u91cd\u8981\u3002LED\u8def\u706f\u88c5\u5728\u6237\u5916\u66f4\u8981\u52a0\u5f3a\u6d6a\u6d8c\u9632\u62a4\u3002\u7531\u4e8e\u7535\u7f51\u8d1f\u8f7d\u7684\u542f\u7529\u548c\u96f7\u51fb\u7684\u611f\u5e94\uff0c\u4ece\u7535\u7f51\u7cfb\u7edf\u4f1a\u4fb5\u5165\u5404\u79cd\u6d6a\u6d8c\uff0c\u6709\u4e9b\u6d6a\u6d8c\u4f1a\u5bfc\u81f4LED\u7684\u635f\u574f\u3002\u56e0\u6b64LED\u9a71\u52a8\u7535\u6e90\u5e94\u5177\u6709\u6291\u5236\u6d6a\u6d8c\u4fb5\u5165\uff0c\u4fdd\u62a4LED\u4e0d\u88ab\u635f\u574f\u7684\u80fd\u529b\u3002EMI\u6ee4\u6ce2\u7535\u8def\u4e3b\u8981\u9632\u6b62\u7535\u7f51\u4e0a\u7684\u8c10\u6ce2\u5e72\u6270\u4e32\u5165\u6a21\u5757\uff0c\u5f71\u54cd\u63a7\u5236\u7535\u8def\u7684\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n

\n\t\u4e09\u76f8\u4ea4\u6d41\u7535\u7ecf\u8fc7\u5168\u6865\u6574\u6d41\u540e\u53d8\u6210\u8109\u52a8\u7684\u76f4\u6d41\u5728\u6ee4\u6ce2\u7535\u5bb9<\/u>\u548c\u7535\u611f<\/u>\u7684\u4f5c\u7528\u4e0b\uff0c\u8f93\u51fa\u76f4\u6d41\u7535\u538b\u3002\u4e3b\u5f00\u5173DC\/AC\u7535\u8def\u5c06\u76f4\u6d41\u7535\u8f6c\u6362\u4e3a\u9ad8\u9891\u8109\u51b2\u7535\u538b\u5728\u53d8\u538b\u5668\u7684\u6b21\u7ea7\u8f93\u51fa\u3002\u53d8\u538b\u5668\u8f93\u51fa\u7684\u9ad8\u9891\u8109\u51b2\u7ecf\u8fc7\u9ad8\u9891\u6574\u6d41\u3001LC\u6ee4\u6ce2\u548cEMI\u6ee4\u6ce2\uff0c\u8f93\u51faLED\u8def\u706f\u9700\u8981\u7684\u76f4\u6d41\u7535\u6e90\u3002<\/p>\n

\n\tPWM\u63a7\u5236\u7535\u8def\u91c7\u7528\u7535\u538b\u7535\u6d41\u53cc\u73af\u63a7\u5236\uff0c\u4ee5\u5b9e\u73b0\u5bf9\u8f93\u51fa\u7535\u538b\u7684\u8c03\u6574\u548c\u8f93\u51fa\u7535\u6d41\u7684\u9650\u5236\u3002\u53cd\u9988\u7f51\u7edc\u91c7\u7528\u6052\u6d41\u6052\u538b\u5668\u4ef6TSM101\u548c\u6bd4\u8f83\u5668<\/u>\uff0c\u53cd\u9988\u4fe1\u53f7\u901a\u8fc7\u5149\u8026<\/u>\u9001\u7ed9PFC\u5668L6561.\u7531\u4e8e\u4f7f\u7528\u4e86PFC\u5668\u4ef6\u4f7f\u6a21\u5757\u7684\u529f\u7387\u56e0\u6570\u8fbe\u52300.95.<\/p>\n

\n\t2 DC\/DC<\/u>\u53d8\u6362\u5668\u8bbe\u8ba1<\/p>\n

\n\tDC\/DC\u53d8\u6362\u5668\u7684\u7c7b\u578b\u6709\u591a\u79cd\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u7528\u7535\u5b89\u5168\uff0c\u672c\u8bbe\u8ba1\u65b9\u6848\u9009\u4e3a\u9694\u79bb\u5f0f\u3002\u9694\u79bb\u5f0fDC\/DC\u53d8\u6362\u5f62\u5f0f\u53c8\u53ef\u8fdb\u4e00\u6b65\u7ec6\u5206\u4e3a\u6b63\u6fc0\u5f0f\u3001\u53cd\u6fc0\u5f0f\u3001\u534a\u6865\u5f0f\u3001\u5168\u6865\u5f0f\u548c\u63a8\u633d\u5f0f\u7b49\u3002\u5176\u4e2d\uff0c\u534a\u6865\u5f0f\u3001\u5168\u6865\u5f0f\u548c\u63a8\u633d\u5f0f\u901a\u5e38\u7528\u4e8e\u5927\u529f\u7387\u8f93\u51fa\u573a\u5408\uff0c\u5176\u6fc0\u52b1\u7535\u8def\u590d\u6742\uff0c\u5b9e\u73b0\u8d77\u6765\u8f83\u56f0\u96be;\u800c\u6b63\u6fc0\u5f0f\u548c\u53cd\u6fc0\u5f0f\u7535\u8def\u5219\u7b80\u5355\u6613\u884c\uff0c\u4f46\u7531\u4e8e\u53cd\u6fc0\u5f0f\u6bd4\u6b63\u6fc0\u5f0f\u66f4\u9002\u5e94\u8f93\u5165\u7535\u538b\u6709\u53d8\u5316\u7684\u60c5\u51b5\uff0c\u4e14\u672c\u7535\u6e90\u7cfb\u7edf\u4e2dPFC\u8f93\u51fa\u7535\u538b\u4f1a\u53d1\u751f\u8f83\u5927\u7684\u53d8\u5316\uff0c\u6545DC\/DC\u53d8\u6362\u91c7\u7528\u53cd\u6fc0\u65b9\u5f0f\uff0c\u6709\u5229\u4e8e\u786e\u4fdd\u8f93\u51fa\u7535\u538b\u7a33\u5b9a\u4e0d\u53d8\u3002<\/p>\n

\n\t\u53cd\u6fc0\u5f0f\u5f00\u5173\u7535\u6e90\u4e3b\u8981\u5e94\u7528\u4e8e\u8f93\u51fa\u529f\u7387\u4e3a5~150W\u7684\u60c5\u51b5\u3002\u8fd9\u79cd\u7535\u6e90\u7ed3\u6784\u662f\u7531Buck-Boost\u7ed3\u6784\u63a8\u6f14\u5e76\u52a0\u4e0a\u9694\u79bb\u53d8\u538b\u5668\u800c\u5f97\u5230\uff0c\u5982\u56fe2\u6240\u793a\u3002\u5728\u53cd\u6fc0\u5f0f\u62d3\u6251\u4e2d\uff0c\u7531\u53d8\u538b\u5668\u4f5c\u4e3a\u50a8\u80fd\u5143\u4ef6\u3002\u5f00\u5173\u7ba1\u5bfc\u901a\u65f6\uff0c\u53d8\u538b\u5668\u50a8\u5b58\u80fd\u91cf\uff0c\u8d1f\u8f7d\u7535\u6d41\u7531\u8f93\u51fa\u6ee4\u6ce2\u7535\u5bb9\u63d0\u4f9b;\u5f00\u5173\u7ba1\u5173\u65ad\u65f6\uff0c\u53d8\u538b\u5668\u5c06\u50a8\u5b58\u7684\u80fd\u91cf\u4f20\u9001\u5230\u8d1f\u8f7d\u548c\u8f93\u51fa\u6ee4\u6ce2\u7535\u5bb9\uff0c\u4ee5\u8865\u507f\u7535\u5bb9\u5355\u72ec\u63d0\u4f9b\u8d1f\u8f7d\u7535\u6d41\u65f6\u6d88\u8017\u7684\u80fd\u91cf\u3002<\/p>\n

\n\t\"\u57fa\u4e8ePFC\u529f\u80fd\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\u8bbe\u8ba1\"<\/p>\n

\n\t\u56fe\u4e2dT1\u4e3a\u9ad8\u9891\u9694\u79bb\u53d8\u538b\u5668\uff0cVQ1\u4e3aCMOS\u529f\u7387\u4e09\u6781\u7ba1<\/u>17N80C3,VD7\u548cVD8\u662f\u77ac\u53d8\u6291\u5236\u4e8c\u6781\u7ba1<\/u>\uff0cVD6\u4e3a\u5feb\u6062\u590d\u4e8c\u6781\u7ba1\uff0cVD5\u4e3a\u53cc\u4e8c\u6781\u7ba1\uff0cC3\u3001C4\u3001C5\u548cC6\u4e3a\u7535\u89e3\u7535\u5bb9\u5668<\/u>\u3002Ubout\u662f\u6765\u81ea\u6574\u6d41\u6865<\/u>\u7684\u8109\u52a8\u76f4\u6d41\u4fe1\u53f7\uff0cGD\u662f\u6765\u81ea\u529f\u7387\u56e0\u6570\u6821\u6b63\u7535\u8def\u7684\u63a7\u5236\u4fe1\u53f7\u3002\u53d8\u538b\u5668\u7684\u5f15\u7ebfl\u548c2\u7ec4\u6210\u4e00\u4e2a\u7ed5\u7ec4\uff0c\u7ed9PFC\u5668\u4ef6\u63d0\u4f9b\u5de5\u4f5c\u7535\u6e90\uff0c\u5f15\u7ebf11\u548c12\u7ec4\u6210\u4e00\u4e2a\u7ed5\u7ec4\uff0c\u4e3a\u6052\u6d41\u6052\u538b\u5668\u4ef6\u548c\u6bd4\u8f83\u5668\u63d0\u4f9b\u5de5\u4f5c\u7535\u6e90\u3002<\/p>\n

\n\t3 \u53cd\u9988\u7f51\u7edc\u7535\u8def\u8bbe\u8ba1<\/p>\n

\n\t3.1\u6052\u6d41\u6052\u538b\u7535\u8def<\/p>\n

\n\t\u672c\u8bbe\u8ba1\u4f7f\u7528\u6052\u6d41\u6052\u538b\u63a7\u5236\u5668\u4ef6TSM101\u8c03\u8282\u8f93\u51fa\u7535\u538b\u548c\u7535\u6d41\uff0c\u4f7f\u4e4b\u7a33\u5b9a\u3002\u7535\u8def\u5982\u56fe3\u6240\u793a\u3002\u901a\u8fc7TSM101\u7684\u63a7\u5236\u4f5c\u7528\uff0c\u4fdd\u8bc1\u4e86\u7535\u6e90\u6052\u6d41(CC)\u548c\u6052\u538b(CV)\u5de5\u4f5c\u3002\u56fe3\u4e2d\uff0cUout+\u548cUout-\u662f\u9694\u79bb\u53d8\u538b\u5668\u7ecf\u8fc7\u53cc\u4e8c\u6781\u7ba1\u548c\u7535\u89e3\u7535\u5bb9\u5668\u6ee4\u6ce2\u7684\u7535\u538b\uff0c\u518d\u7ecf\u7535\u611fL4\u548c\u7535\u5bb9\u6ee4\u6ce2<\/u>\u540e\u7684\u8f93\u51fa\u4e3aUout+\u548cUout-,\u4e3a\u672c\u7535\u6e90\u6a21\u5757<\/u>\u7684\u8f93\u51fa\u7535\u538b\uff0c\u76f4\u63a5\u52a0\u5728LED\u8def\u706f\u4e0a\u3002\u53ef\u8c03\u7535\u963b<\/u>\u5668RV1\u548cRV2\u5206\u522b\u8c03\u8282\u8f93\u51fa\u7535\u538b\u548c\u7535\u6d41\u7684\u5927\u5c0f\u3002R10\u548cR11\u4e3a22mΩ\u7684\u7535\u963b<\/u>\uff0c\u5206\u522b\u5bf9\u7535\u6e90\u8f93\u51fa\u7684\u7535\u538b\u548c\u7535\u6d41\u91c7\u6837\u3002TMS101\u7684\u8f93\u51faTOUT\u901a\u8fc7\u5149\u7535\u8026\u5408\u5668<\/u>\u3001\u53ef\u63a7\u7845<\/u>\u548c\u4e09\u6781\u7ba1\u7b49\u7535\u8def\u9001\u5230L6561\u7684\u5f15\u811a5,\u901a\u8fc7\u53cd\u9988\u7535\u8def\u5b9e\u73b0\u6052\u6d41\u63a7\u5236\u3002\u5668\u4ef6\u5f15\u811a8\u63a5\u8f85\u52a9\u7535\u6e90\uff0c\u5f15\u811a4\u63a5\u53d8\u538b\u5668T1\u526f\u8fb9\u5730\u3002<\/p>\n

\n\t\"\u57fa\u4e8ePFC\u529f\u80fd\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\u8bbe\u8ba1\"<\/p>\n

\n\t3.2\u6bd4\u8f83\u5668\u7535\u8def<\/p>\n

\n\t\u91c7\u7528\u6bd4\u8f83\u5668LM258,\u7535\u8def\u5982\u56fe4\u6240\u793a\u3002<\/p>\n

\n\t\"\u57fa\u4e8ePFC\u529f\u80fd\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\u8bbe\u8ba1\"<\/p>\n

\n\t\u8f93\u51fa\u7aef\u7684\u91c7\u6837\u7535\u963b\u4e24\u7aef\u7684\u7535\u538b\u4fe1\u53f7VR<\/u>+\u548cVR-\u9001\u5230\u6bd4\u8f83\u5668LM258,\u901a\u8fc7\u4e0e\u9884\u8bbe\u7535\u538b\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ea7\u751f\u7535\u538b\u53cd\u9988\u4fe1\u53f7DOUT.VF\u4e3a\u53d8\u538b\u5668T1\u526f\u8fb9\u7ed5\u7ec4\u4ea7\u751f\u7684\u8f85\u52a9\u7535\u6e90\u3002<\/p>\n

\n\t4 PFC\u7535\u8def\u8bbe\u8ba1<\/p>\n

\n\t\u672c\u8bbe\u8ba1\u91c7\u7528\u6700\u5e38\u89c1\u7684\u6709\u6e90\u529f\u7387\u56e0\u6570\u6821\u6b63\u7684\u63a7\u5236\u5668\u4ef6L6561.PFC\u7535\u8def\u5982\u56fe5\u6240\u793a\u3002<\/p>\n

\n\t\"\u57fa\u4e8ePFC\u529f\u80fd\u7684\u5ba4\u5916LED\u8def\u706f\u7535\u6e90\u8bbe\u8ba1\"<\/p>\n

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