{"id":10613,"date":"2022-11-02T12:07:33","date_gmt":"2022-11-02T04:07:33","guid":{"rendered":"http:\/\/www.szryc.com\/?p=10613"},"modified":"2022-11-02T12:07:33","modified_gmt":"2022-11-02T04:07:33","slug":"%e5%bc%80%e5%85%b3%e7%94%b5%e6%ba%90%ef%bc%88dc-dc%ef%bc%89%e5%8e%9f%e7%90%86%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=10613","title":{"rendered":"\u5f00\u5173\u7535\u6e90\uff08DC\/DC\uff09\u539f\u7406\u4ecb\u7ecd"},"content":{"rendered":"<p><u>DC\/DC<\/u><u>\u7535\u6e90<\/u>\u6307\u7684\u662f\u76f4\u6d41\u8f6c\u76f4\u6d41\u7684\u7535\u8def\uff0c\u6709\u5347\u538b\u964d\u538b\u4e24\u79cd\u7535\u8def\uff0c\u6309\u7406\u6765\u8bf4\uff0c<u>LDO<\/u>\u4e5f\u662f<u>DC<\/u>DC\u7535\u6e90\uff0c\u4f46\u884c\u4e1a\u5185\u53ea\u8ba4\u4e3a\u4ee5\u5f00\u5173\u5f62\u5f0f\u5b9e\u73b0\u7684\u7535\u6e90\u4e3aDC\/DC\u7535\u6e90\u3002<\/p>\n<p>\u4e00\uff0cDC\/DC\u57fa\u672c\u62d3\u6251<\/p>\n<p>Buck\u3001Boost\u578b<\/p>\n<p>\u7535\u611f\u7535\u538b\u4f0f\u79d2\u5e73\u8861\u5b9a\u5f8b<\/p>\n<p>\u4e00\u4e2a\u529f\u7387\u53d8\u6362\u5668\uff0c\u5f53\u8f93\u5165\u3001\u8d1f\u8f7d\u548c\u63a7\u5236\u5747\u4e3a\u56fa\u5b9a\u503c\u65f6\u7684\u5de5\u4f5c\u72b6\u6001\uff0c\u5728<u>\u5f00\u5173\u7535\u6e90<\/u>\u4e2d\uff0c\u88ab\u79f0\u4e3a\u7a33\u6001\u3002\u7a33\u6001\u4e0b\uff0c\u529f\u7387\u53d8\u6362\u5668\u4e2d\u7684\u7535\u611f\u6ee1\u8db3\u7535\u611f\u7535\u538b\u4f0f\u79d2\u5e73\u8861\u5b9a\u5f8b\uff1a\u5bf9\u4e8e\u5df2\u5de5\u4f5c\u5728\u7a33\u6001\u7684DC\/DC\u529f\u7387\u53d8\u6362\u5668\uff0c\u6709\u6e90\u5f00\u5173\u5bfc\u901a\u65f6\u52a0\u5728\u529f\u7387\u7535\u611f\u4e0a\u7684\u6b63\u5411\u4f0f\u79d2\u4e00\u5b9a\u7b49\u4e8e\u6709\u6e90\u5f00\u5173\u622a\u81f3\u65f6\u52a0\u5728\u8be5\u7535\u611f\u4e0a\u7684\u53cd\u5411\u4f0f\u79d2\u3002<\/p>\n<p>1. BUCK\u964d\u538b\u578b<\/p>\n<p>\u5148\u6765\u770b\u4e00\u4e0b\u539f\u7406\u56fe<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10615\" title=\"fc3c4d30-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc3c4d30-59d3-11ed-a3b6-dac502259ad0.png\" alt=\"fc3c4d30-59d3-11ed-a3b6-dac502259ad0\" width=\"693\" height=\"275\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc3c4d30-59d3-11ed-a3b6-dac502259ad0.png 693w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc3c4d30-59d3-11ed-a3b6-dac502259ad0-300x119.png 300w\" sizes=\"(max-width: 693px) 100vw, 693px\" \/><\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10616\" title=\"fc4b131a-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc4b131a-59d3-11ed-a3b6-dac502259ad0.png\" alt=\"fc4b131a-59d3-11ed-a3b6-dac502259ad0\" width=\"693\" height=\"475\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc4b131a-59d3-11ed-a3b6-dac502259ad0.png 693w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc4b131a-59d3-11ed-a3b6-dac502259ad0-300x206.png 300w\" sizes=\"(max-width: 693px) 100vw, 693px\" \/><\/p>\n<p>BUCK\u7535\u8def\u539f\u7406\u548c\u4fe1\u53f7\u8f6c\u53d8\u8fc7\u7a0b<\/p>\n<p>\u5f53PWM\u9a71\u52a8\u9ad8\u7535\u5e73\u4f7f\u5f97NMOS\u7ba1S1\u5bfc\u901a\uff0c\u5ffd\u7565MOS\u7ba1\u7684\u5bfc\u901a\u538b\u964d\uff0c\u7535\u611f<u>\u7535\u6d41<\/u>\u5448\u7ebf\u6027\u4e0a\u5347\uff0c\u6b64\u65f6\u7535\u611f\u6b63\u5411\u4f0f\u79d2\u4e3a\uff1aV*Ton=(Vin-Vo)*Ton<\/p>\n<p>\u5f53PWM\u9a71\u52a8\u4f4e\u7535\u5e73\u4f7f\u5f97NMOS\u7ba1S1\u622a\u81f3\u65f6\uff0c\u7535\u611f\u7535\u6d41\u4e0d\u80fd\u7a81\u53d8\uff0c\u7ecf\u8fc7\u7eed\u6d41<u>\u4e8c\u6781\u7ba1<\/u>\u5f62\u6210\u56de\u8def(\u5ffd\u7565\u4e8c\u6781\u7ba1\u538b\u964d)\uff0c\u7ed9\u8f93\u51fa\u8d1f\u8f7d\u4f9b\u7535\uff0c\u6b64\u65f6\u7535\u611f\u7535\u6d41\u4e0b\u964d\uff0c\u6b64\u65f6\u7535\u611f\u53cd\u5411\u4f0f\u79d2\u4e3a\uff1aV*Toff=Vo*(Ts-Ton)<\/p>\n<p>\u6839\u636e\u7535\u611f\u7535\u538b\u4f0f\u79d2\u5e73\u8861\u5b9a\u5f8b\u53ef\u5f97\uff1a(Vin-Vo)*Ton=Vo*(Ts-Ton)<\/p>\n<p>\u5373 Vo=D*Vin (D\u4e3a\u5360\u7a7a\u6bd4)<\/p>\n<p>2.BOOST\u5347\u538b\u578b<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10617\" title=\"fc6b158e-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc6b158e-59d3-11ed-a3b6-dac502259ad0.png\" alt=\"fc6b158e-59d3-11ed-a3b6-dac502259ad0\" width=\"693\" height=\"347\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc6b158e-59d3-11ed-a3b6-dac502259ad0.png 693w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc6b158e-59d3-11ed-a3b6-dac502259ad0-300x150.png 300w\" sizes=\"(max-width: 693px) 100vw, 693px\" \/><\/p>\n<p>\u548cBUCK\u7535\u8def\u7c7b\u4f3c\u7684\u5206\u6790\u65b9\u6cd5\uff0c\u5f53MOS\u7ba1\u5bfc\u901a\u65f6\uff0c\u7535\u611f\u7684\u6b63\u5411\u4f0f\u79d2\u4e3a\uff1aVin*Ton;\u5f53MOS\u7ba1\u622a\u81f3\u65f6\uff0c\u7535\u611f\u7684\u53cd\u5411\u4f0f\u79d2\u4e3a\uff1a(Vo- Vin)*(Ts-Ton)<\/p>\n<p>\u6839\u636e\u7535\u611f\u7535\u538b\u4f0f\u79d2\u5e73\u8861\u5b9a\u5f8b\u53ef\u5f97\uff1aVin*Ton=(Vo- Vin)*(Ts-Ton)<\/p>\n<p>\u5373 Vo=Vin\/(1-D)<\/p>\n<p><u>matlab<\/u><u>\u4eff\u771f<\/u>\u56fe\uff1a<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10619\" title=\"fc8d57fc-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc8d57fc-59d3-11ed-a3b6-dac502259ad0.png\" alt=\"fc8d57fc-59d3-11ed-a3b6-dac502259ad0\" width=\"720\" height=\"393\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc8d57fc-59d3-11ed-a3b6-dac502259ad0.png 720w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fc8d57fc-59d3-11ed-a3b6-dac502259ad0-300x164.png 300w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>matlab\u4eff\u771f\u56fe<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10618\" title=\"fca645e6-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fca645e6-59d3-11ed-a3b6-dac502259ad0.gif\" alt=\"fca645e6-59d3-11ed-a3b6-dac502259ad0\" width=\"1080\" height=\"629\" \/><\/p>\n<p>\u4eff\u771fVout\u5347\u538b\u8fc7\u7a0b<\/p>\n<p>3.\u540c\u6b65\u6574\u6d41\u6280\u672f<\/p>\n<p>\u7531\u4e8e\u4e8c\u6781\u7ba1\u5bfc\u901a\u65f6\u81f3\u5c11\u5b58\u57280.3V\u7684\u538b\u964d\uff0c\u56e0\u6b64\u7eed\u6d41\u4e8c\u6781\u7ba1D\u6240\u6d88\u8017\u7684\u529f\u7387\u5c06\u4f1a\u79f0\u4e3aDC\/DC\u7535\u6e90\u4e3b\u8981\u529f\u8017\uff0c\u4ece\u800c\u4e25\u91cd\u9650\u5236\u4e86\u6548\u7387\u7684\u63d0\u9ad8\u3002\u4e3a\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u4ee5\u5bfc\u901a\u7535\u963b\u6781\u5c0f\u7684MOS\u7ba1\u53d6\u4ee3\u7eed\u6d41\u4e8c\u6781\u7ba1\u3002\u7136\u540e\u901a\u8fc7\u63a7\u5236\u5668\u540c\u65f6\u63a7\u5236\u5f00\u5173\u7ba1\u548c\u540c\u6b65\u6574\u6d41\u7ba1\uff0c\u8981\u4fdd\u8bc1\u4e24\u4e2aMOS\u7ba1\u4e0d\u80fd\u540c\u65f6\u5bfc\u901a\uff0c\u8d1f\u8d23\u5c06\u4f1a\u53d1\u751f\u77ed\u8def\u3002<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10620\" title=\"fccffc10-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fccffc10-59d3-11ed-a3b6-dac502259ad0.png\" alt=\"fccffc10-59d3-11ed-a3b6-dac502259ad0\" width=\"718\" height=\"308\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fccffc10-59d3-11ed-a3b6-dac502259ad0.png 718w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fccffc10-59d3-11ed-a3b6-dac502259ad0-300x129.png 300w\" sizes=\"(max-width: 718px) 100vw, 718px\" \/><\/p>\n<p>\u4e8c\u3001DC\/DC\u7535\u6e90\u8c03\u5236\u65b9\u5f0f<\/p>\n<p>DC\/DC\u7535\u6e90\u5c5e\u4e8e\u65a9\u6ce2\u7c7b\u578b\uff0c\u5373\u6309\u7167\u4e00\u5b9a\u7684\u8c03\u5236\u65b9\u5f0f\uff0c\u4e0d\u65ad\u5730\u5bfc\u901a\u548c\u5173\u65ad\u9ad8\u901f\u5f00\u5173\uff0c\u901a\u8fc7\u63a7\u5236\u5f00\u5173\u901a\u65ad\u7684\u5360\u7a7a\u6bd4\uff0c\u53ef\u4ee5\u5b9e\u73b0\u76f4\u6d41\u7535\u6e90\u7535\u5e73\u7684\u8f6c\u6362\u3002DC\/DC\u7535\u6e90\u7684\u8c03\u5236\u65b9\u5f0f\u6709\u4e09\u79cd\uff1aPWM\u65b9\u5f0f\u3001PFM\u65b9\u5f0f\u3001PWM\u4e0ePFM\u7684\u6df7\u5408\u65b9\u5f0f\u3002<\/p>\n<p>1.PWM(\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236)<\/p>\n<p>PWM\u91c7\u7528\u6052\u5b9a\u7684\u5f00\u5173\u9891\u7387\uff0c\u901a\u8fc7\u8c03\u8282\u8109\u51b2\u5bbd\u5ea6(\u5360\u7a7a\u6bd4)\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u7a33\u5b9a\u7535\u6e90\u7535\u538b\u7684\u8f93\u51fa\u3002\u5728PWM\u8c03\u5236\u65b9\u5f0f\u4e0b\uff0c\u5f00\u5173\u9891\u7387\u6052\u5b9a\uff0c\u5373\u4e0d\u5b58\u5728\u957f\u65f6\u95f4\u88ab\u5173\u65ad\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u4f18\u70b9\uff1a\u566a\u58f0\u4f4e\u3001\u6548\u7387\u9ad8\uff0c\u5bf9\u8d1f\u8f7d\u7684\u53d8\u5316\u54cd\u5e94\u901f\u5ea6\u5feb\uff0c\u4e14\u652f\u6301\u8fde\u7eed\u4f9b\u7535\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002<\/p>\n<p>\u7f3a\u70b9\uff1a\u8f7b\u8d1f\u8f7d\u65f6\u6548\u7387\u8f83\u4f4e\uff0c\u4e14\u7535\u8def\u5de5\u4f5c\u4e0d\u7a33\u5b9a\uff0c\u5728\u8bbe\u8ba1\u4e0a\u9700\u8981\u63d0\u4f9b\u5047\u8d1f\u8f7d\u3002<\/p>\n<p>2.PFM(\u8109\u51b2\u9891\u7387\u8c03\u5236)<\/p>\n<p>PFM\u901a\u8fc7\u8c03\u8282\u5f00\u5173\u9891\u7387\u4ee5\u5b9e\u73b0\u7a33\u5b9a\u7684\u7535\u6e90\u7535\u538b\u7684\u8f93\u51fa\u3002PFM\u5de5\u4f5c\u65f6\uff0c\u5728\u8f93\u51fa\u7535\u538b\u8d85\u8fc7\u4e0a<u>\u9608\u503c\u7535\u538b<\/u>\u540e\uff0c\u5176\u8f93\u51fa\u5c06\u5173\u65ad\uff0c\u76f4\u5230\u8f93\u51fa\u7535\u538b\u8dcc\u843d\u5230\u4f4e\u4e8e\u4e0b\u9608\u503c\u7535\u538b\u65f6\uff0c\u624d\u91cd\u65b0\u5f00\u59cb\u5de5\u4f5c\u3002<\/p>\n<p>\u4f18\u70b9\uff1a\u529f\u8017\u8f83\u4f4e\uff0c\u8f7b\u8d1f\u8f7d\u65f6\uff0c\u6548\u7387\u9ad8\u4e14\u65e0\u9700\u63d0\u4f9b\u5047\u8d1f\u8f7d\u3002<\/p>\n<p>\u7f3a\u70b9\uff1a\u5bf9\u8d1f\u8f7d\u53d8\u5316\u54cd\u5e94\u8f83\u6162\uff0c\u8f93\u51fa\u7535\u538b\u7684\u566a\u58f0\u548c\u7eb9\u6ce2\u76f8\u5bf9\u8f83\u5927\uff0c\u4e0d\u9002\u5408\u5de5\u4f5c\u4e8e\u8fde\u7eed\u4f9b\u7535\u65b9\u5f0f\u3002<\/p>\n<p>\u4e09\u3001DC\/DC\u82af\u7247\u7684\u5185\u90e8\u6784\u9020<\/p>\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u6765\u770b\u770bDC\/DC\u7535\u6e90\u82af\u7247\u5185\u90e8\u7684\u5355\u5143\u6a21\u5757\uff0c\u5e76\u4e14\u7ed9\u5927\u5bb6\u770b\u770b\u57fa\u672c\u62d3\u6251\u4e0e\u7535\u6e90\u82af\u7247\u7684\u8054\u7cfb\uff0c\u5148\u6765\u770b\u4e00\u4e2a\u56fe\u3002<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10621\" title=\"fce37c9a-59d3-11ed-a3b6-dac502259ad0\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fce37c9a-59d3-11ed-a3b6-dac502259ad0.png\" alt=\"fce37c9a-59d3-11ed-a3b6-dac502259ad0\" width=\"720\" height=\"441\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fce37c9a-59d3-11ed-a3b6-dac502259ad0.png 720w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/11\/fce37c9a-59d3-11ed-a3b6-dac502259ad0-300x184.png 300w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>\u4e00\u6b3e\u7535\u6e90\u80cc\u5149IC\u7684\u5185\u90e8\u539f\u7406\u6846\u56fe<\/p>\n<p>1.Vref&amp;Error Amp\u57fa\u51c6\u7535\u538b\u4e0e\u8bef\u5dee<u>\u653e\u5927\u5668<\/u><\/p>\n<p>\u8bef\u5dee\u653e\u5927\u5668\u7684\u4f5c\u7528\u5c31\u662f\u5c06\u53cd\u9988\u7535\u538b(FB\u5f15\u811a\u7535\u538b)\u4e0e\u57fa\u51c6\u7535\u538b(200mv)\u7684\u5dee\u503c\u8fdb\u884c\u653e\u5927\uff0c\u7136\u540e\u518d\u7528\u8be5\u4fe1\u53f7\u53bb\u63a7\u5236PWM\u8f93\u51fa\u4fe1\u53f7\u7684\u5360\u7a7a\u6bd4\u3002<\/p>\n<p>2.Thermal Shutdown \u6e29\u5ea6\u4fdd\u62a4\uff1a\u5f53\u6e29\u5ea6\u9ad8\u4e8e\u9650\u5b9a\u503c\uff0c\u82af\u7247\u505c\u6b62\u5de5\u4f5c\u3002<\/p>\n<p>3.soft 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