{"id":17566,"date":"2022-01-16T10:02:26","date_gmt":"2022-01-16T02:02:26","guid":{"rendered":"https:\/\/www.paiqinano.com\/?p=17566"},"modified":"2022-01-08T16:35:52","modified_gmt":"2022-01-08T08:35:52","slug":"%e5%bc%80%e5%85%b3%e7%94%b5%e6%ba%90%e6%96%b9%e9%9d%a2%e7%9a%84%e5%ba%94%e7%94%a8pwm%e4%bf%a1%e5%8f%b7%e7%9a%84%e4%ba%a7%e7%94%9f%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.paiqinano.com\/?p=17566","title":{"rendered":"\u5f00\u5173\u7535\u6e90\u65b9\u9762\u7684\u5e94\u7528,PWM\u4fe1\u53f7\u7684\u4ea7\u751f\u673a\u5236"},"content":{"rendered":"

\n\t\u5728\u524d\u9762\u7684\u6587\u7ae0\u5185\u5bb9\u4e2d\u5927\u5bb6\u7b80\u6613\u53d9\u8ff0\u4e86PWM\u7684\u539f\u7406\u5e76\u6d45\u5c1d\u8f84\u6b62\u5730\u8bb2\u4e86\u5176\u5728DAC<\/u>\u3001LED<\/u>\u53d8\u5149\u3001\u63a8\u52a8\u7535\u673a<\/u>\u5c42\u9762\u7684\u8fd0\u7528\uff0c\u6700\u7ec8\u5927\u5bb6\u518d\u4e00\u8d77\u6765\u770b\u770b\u5176\u5728\u5f00\u5173\u7535\u6e90\u7535\u8def<\/u>\u5c42\u9762\u7684\u8fd0\u7528\u3002<\/p>\n

\n\t\u6211\u4eec\u77e5\u9053\u7535\u6e90\u5f00\u5173<\/u>\u5f00\u5173\u7535\u6e90\u5728\u76ee\u524d\u7684\u7535\u5b50\u5668\u4ef6<\/u>\u5546\u54c1\u4e2d\u76db\u884c\uff0c\u5173\u952e\u7684\u56e0\u7d20\u662f\u5176\u9002\u7528\u7684\u952e\u5165\u5de5\u4f5c\u7535\u538b\u91c7\u6837\u7387\u5bbd\u3001\u5728\u5f88\u5bbd\u7684\u952e\u5165\u7535\u6d41\u7535\u538b\u8303\u7574\u5185\u53ef\u4ee5\u4fdd\u8bc1\u8f83\u9ad8\u7684\u53d8\u6362\u9ad8\u6548\u7387\uff0c\u6362\u53e5\u8bdd\u8bf4\u52a8\u80fd\u6d88\u8017\u76f8\u5bf9\u6027\u8f83\u5c11\uff0c\u8fdb\u800c\u4e5f\u9884\u9632\u4e86\u7ebf\u8def\u677f<\/u>\u7684\u592a\u70ed\u548c\u5143\u5668\u4ef6\/\u710a\u5c42\u7b49\u7684\u5feb\u901f\u8870\u8001\u9020\u6210\u4f7f\u7528\u5bff\u547d\u5927\u5e45\u5ea6\u51cf\u5c11\u3002\u540c\u7ebf\u5f62\u7a33\u538b\u7535\u6e90<\/u>\u4e09\u6781\u7ba1<\/u>\u5de5\u4f5c\u4e2d\u5728\u975e\u7ebf\u6027\u60c5\u51b5\u4e0e\u4f17\u4e0d\u540c\u7684\u662f\uff0c\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90<\/u>\u4e2d\u7684\u4e09\u6781\u7ba1\uff08\u5728\u8fd9\u513f\u5927\u5bb6\u5305\u542bMOS\u7ba1\uff09\u5de5\u4f5c\u4e2d\u5728\u6309\u94ae\u60c5\u51b5\uff0c\u8fd9\u4e5f\u662f\u201c\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7ba1\u201d\u540d\u5b57\u7684\u7531\u6765\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\n\t<\/p>\n

\n\t\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u7684\u539f\u7406\u5e73\u9762\u56fe<\/p>\n

\n\t\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u5173\u952e\u7531\u5de5\u4f5c\u4e2d\u4e8e\u6309\u94ae\u60c5\u51b5\u7684\u4e09\u6781\u7ba1 \u50a8\u80fd\u6280\u672f\u7684\u7535\u611f\u5668<\/u> \u7535\u5bb9\u5668<\/u>\u7ec4\u6210\uff1a<\/p>\n

\n\t\u5de5\u4f5c\u4e2d\u4e8e\u7535\u6e90\u5f00\u5173\u65b9\u5f0f\u7684\u4e09\u6781\u7ba1\uff1aOn\u7684\u60c5\u51b5\u4e0b\u5bf9\u7535\u611f\u5668\u7535\u6c60\u5145\u7535\uff0c\u7535\u6c60\u5145\u7535\u5145\u8db3\u7684\u60c5\u51b5\u4e0b\u7535\u6e90\u5f00\u5173\u5173\u6389\uff0c\u7535\u6e90\u53d8\u538b\u5668\u5c06\u52a8\u80fd\u4ee5\u7535\u6d41\u91cf<\/u>\u7684\u65b9\u6cd5\u5f80\u8d1f\u8377\u914d\u7535\uff0c\u5bfc\u51fa\u7535\u5bb9\u5668\u540c\u7535\u611f\u5668\u4e00\u8d77\u786e\u4fdd\u5de5\u4f5c\u7535\u538b\u7684\u5e73\u7a33\u3002\u57fa\u7840\u7406\u8bba\u4e0a\u5f53\u53d7\u9a97\u4e09\u6781\u7ba1\u5904\u5728On\u7684\u8fc7\u7a0b\u4e2d\u5176\u6c92\u6709\u635f\u8017\uff0c\u5904\u5728Off\u7684\u8fc7\u7a0b\u4e2d\u6c92\u6709\u7535\u6d41\u91cf\u6839\u636e\uff0c\u56e0\u6b64\u53ef\u4ee5\u505a\u5230\u8f83\u4e3a\u9ad8\u7684\u53d8\u6362\u9ad8\u6548\u7387\u3002\u4f46\u4e8b\u5b9e\u4e0a\u5176\u4f9d\u7136\u6709\u635f\u8017\u548c\u7535\u6d41\u91cf\u6839\u636e\u7684\uff0c\u800c\u4e14\u4e5f\u6709\u5176\u4ed6\u5143\u5668\u4ef6\u4e0a\u7684\u8017\u635f\uff1b<\/p>\n

\n\t\u7535\u611f\u5668\uff1a\u7535\u6d41\u91cf\u6ce8\u5165\u7684\u60c5\u51b5\u4e0b\u6839\u636e\u7535\u78c1\u573a\u50a8\u5b58\u52a8\u80fd\uff0c\u5b83\u4e0d\u592a\u559c\u6b22\u7535\u6d41\u91cf\u7684\u8f6c\u53d8\uff0c\u4f1a\u52aa\u529b\u7ef4\u6301\u7535\u6d41\u91cf\u4e3a\u53c2\u91cf\u800c\u505a\u5230\u5149\u6ed1\u7535\u6d41\u91cf\u7684\u529f\u6548\uff1b<\/p>\n

\n\t\u7535\u5bb9\u5668\uff1a\u80fd\u770b\u505a\u4e3a\u5de5\u4f5c\u7535\u538b\u8fc7\u6ee4\u5668<\/u>\uff0c\u5b83\u4e0d\u592a\u559c\u6b22\u5de5\u4f5c\u7535\u538b\u7684\u8f6c\u53d8\uff0c\u7528\u5176\u50a8\u5b58\u7684\u52a8\u80fd\u6765\u7ef4\u6301\u5de5\u4f5c\u7535\u538b\u4e3a\u53c2\u91cf\u3002<\/p>\n

\n\t\u7528\u4ee5\u64cd\u7eb5\u4e09\u6781\u7ba1\u5f00\u3001\u5173\u8fdb\u800c\u8c03\u8282\u8f93\u51fa\u7535\u538b\u7684\u6570\u636e\u4fe1\u53f7\u5173\u952e\u9009\u7528\u7684\u4fbf\u662fPWM\u4fe1\u53f7\uff0c\u6709\u7684\u5143\u5668\u4ef6\u5219\u4f9d\u636e\u8d1f\u8377\u7684\u72b6\u51b5\u7075\u4fbf\u5e94\u7528PWM\u548cPFM\uff08\u5355\u8109\u51b2\u5de5\u4f5c\u9891\u7387\u8c03\u914d – \u56fa\u5b9a\u4e0d\u52a8pwm\u5360\u7a7a\u6bd4\uff0c\u66f4\u6539\u5355\u8109\u51b2\u7684\u53cd\u590d\u5de5\u4f5c\u9891\u7387\uff09\u3002\u64cd\u7eb5\u4e09\u6781\u7ba1\u5f00\u3001\u5173\u7684PWM\u4fe1\u53f7\u54ea\u513f\u6765\u7684\u5462\uff1f\u770b\u4e0b\u9762\u7684\u56fe – \u5bfc\u51fa\u7aef\uff08\u63d0\u4f9b\u8d1f\u8377\uff09\u7684\u76f4\u6d41\u7535\u538b\u5f00\u5c55\u5206\u538b\u4e4b\u540e\u4e0e\u5143\u5668\u4ef6\u5185\u5d4c\u7684\u53c2\u7167\u5de5\u4f5c\u7535\u538b\uff08\u4e00\u822c\u79f0\u4e4b\u4e3aBandgap Reference\uff09\u76f8\u8f83\u4e3a\uff0c\u5047\u5982\u8f93\u51fa\u7535\u538b\u5206\u538b\u540e\u7684\u5de5\u4f5c\u7535\u538b\u4e0e\u53c2\u7167\u5de5\u4f5c\u7535\u538b\u6709\u504f\u5dee\uff0c\u5219\u8f83\u4e3a\u7535\u6e90\u7535\u8def<\/u>\u5bfc\u51fa\u76f8\u5bf9\u5e94\u7684\u504f\u5dee\u6570\u636e\u4fe1\u53f7\u64cd\u7eb5PWM\u9020\u6210\u7535\u6e90\u7535\u8def\u9020\u6210\u7528\u4ee5\u64cd\u7eb5\u4e09\u6781\u7ba1\u5f00\u3001\u5173\u7684\u64cd\u7eb5\u6570\u636e\u4fe1\u53f7\uff0cPWM\u7684pwm\u5360\u7a7a\u6bd4\u4e0e\u504f\u5dee\u5de5\u4f5c\u7535\u538b\u7684\u591a\u5c11\u6210\u4e00\u5b9a\u7684\u5360\u6bd4\uff0c\u90a3\u6837\u5c31\u9020\u6210\u4e86\u4e00\u4e2a\u5e73\u7a33\u6536\u655b\u6027\u7684\u610f\u89c1\u53cd\u9988\u73af\u57ce\u8def\uff0c\u6700\u7ec8\u505a\u5230\u8f93\u51fa\u7535\u538b\u7684\u5206\u538b\u4e0e\u53c2\u7167\u5de5\u4f5c\u7535\u538b\u76f8\u540c\uff0c\u8fdb\u800c\u504f\u5dee\u6700\u5c11\u3002<\/p>\n

\n\t<\/p>\n

\n\tPWM\u4fe1\u53f7\u7684\u9020\u6210\u4f53\u5236<\/p>\n

\n\t\u56e0\u4e3a\u4e0a\u73ed\u5728\u5f00\u5173\u65b9\u5f0f\uff0c\u50a8\u80fd\u6280\u672f\u7684\u7535\u611f\u5668\u548c\u5149\u6ed1\u7535\u5bb9\u5668\u7684\u53cd\u6620\u90fd\u8981\u6642\u95f4\uff0c\u56e0\u800c\u8f93\u51fa\u7535\u538b\u4e0a\u4e00\u5b9a\u4f1a\u5b58\u6709\u7740\u8d77\u4f0f\uff0c\u4e5f\u5c31\u662f\u504f\u5dee\u5de5\u4f5c\u7535\u538b\u4e5f\u4f1a\u5728\u4e0d\u5927\u8303\u7574\u5185\u8d77\u4f0f\uff0cPWM\u7684pwm\u5360\u7a7a\u6bd4\u4e5f\u5728\u98a4\u52a8\uff0c\u4f46\u5728\u4e00\u5b9a\u7684\u8303\u7574\u5185\uff0c\u8fd9\u79cd\u8d77\u4f0f\u90fd\u4e0d\u53ef\u80fd\u76f4\u63a5\u5f71\u54cd\u5230\u73af\u57ce\u8def\u7684\u7a33\u5b9a\u5de5\u4f5c\u3002<\/p>\n

\n\t\u8f93\u51fa\u7535\u538b\u4e0a\u7684\u8d77\u4f0f – \u4e5f\u5c31\u662f\u9ad8\u9891\u5f00\u5173\u566a\u97f3\uff0c\u4e0ePWM\u7684\u7535\u6e90\u5f00\u5173\u5168\u8fc7\u7a0b\u6709\u5173\uff0c\u4e0d\u4e00\u6837\u7684\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u4ef6\u5176PWM\u7684\u7535\u6e90\u5f00\u5173\u5de5\u4f5c\u9891\u7387\u4e5f\u4f1a\u4e0d\u4e00\u6837\uff0c\u4ece\u800c\u4e5f\u4f1a\u76f4\u63a5\u5f71\u54cd\u5230\u50a8\u80fd\u6280\u672f\u7535\u5bb9\u548c\u5149\u6ed1\u7535\u5bb9\u5668\u7684\u6311\u9009\uff0c\u5b9e\u9645\u7684\u6311\u9009\u6807\u51c6\u5927\u5bb6\u4f1a\u5728\u7535\u8def\u4e2d\u5f00\u5c55\u89e3\u8bfb\u3002<\/p>\n

\n\t\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u7684\u4f18\u52bf\uff1a<\/p>\n

\n\t\u9ad8\u6548\u7387\u8f83\u4e3a\u9ad8\uff0c\u76f8\u5bf9\u6027\u6bd4\u57fa\u672c\u7684\u7ebf\u5f62\u7a33\u538b\u7535\u6e90\uff0c\u4e00\u822c\u6765\u8bb2\u5176\u9ad8\u6548\u7387\u662f\u76f8\u5bf9\u6bd4\u8f83\u9ad8\u7684\uff0c\u4f46\u4e5f\u6709\u4e00\u4e9b\u56e0\u4e3a\u5143\u5668\u4ef6\u7684\u975e\u7406\u60f3\u4ea7\u751f\u4e00\u4e9b\u8017\u635f\uff0c\u5728\u4e00\u4e2a\u5177\u4f53\u7684\u4f53\u7cfb\u4e2d\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u9ad8\u6548\u7387\u662f\u4e0d\u662f\u4e00\u5b9a\u9ad8\u8fc7LDO<\/u>\uff08I\/O\u538b\u529b\u5dee\u8f83\u4f4e\u7684\u4e00\u79cd\u7ebf\u5f62\u7a33\u538b\u7535\u6e90\uff09\uff0c\u5fc5\u987b\u6309\u7167\u5177\u4f53\u7684\u5de5\u4f5c\u7535\u538b\u3001\u7535\u6d41\u91cf\u72b6\u51b5\u6765\u5256\u6790\u3001\u91c7\u7528\uff1b<\/p>\n

\n\t\u952e\u5165\u7535\u6d41\u7535\u538b\u8303\u7574\u8f83\u5bbd – \u5168\u4e16\u754c\u8dd1\u5230\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u7528\u7684\u7b14\u8bb0\u672c\u7535\u6e90\u7535\u6e90\u9002\u914d\u5668<\/u>\u3001\u5243\u987b\u5200\u3001\u624b\u673a\u5145\u7535\u5934\u8fd9\u4e9b\u90fd\u7528\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7ba1\u7684\u65b9\u6cd5\u5b8c\u6210\u7684\uff0c\u7ebf\u5f62\u7a33\u538b\u7535\u6e90\u5728\u8fd9\u7c7b\u8981\u6c42\u4e0b\u675f\u624b\u65e0\u7b56\u7684\uff1b<\/p>\n

\n\t\u540c\u6837\u8f93\u51fa\u529f\u7387\u4e0b\uff0c\u5c24\u5176\u662f\u529f\u7387\u5927\u7684\uff0c\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u7684\u5bb9\u79ef\u53ef\u4ee5\u505a\u7684\u8f83\u5c0f\uff0c\u8fd9\u5f52\u529f\u4e8e\u7535\u6e90\u5f00\u5173\u8f93\u51fa\u529f\u7387\u7684\u63d0\u5347\uff0c\u6709\u7684\u8fbe\u5230\u51e0MHz\uff0c\u5143\u5668\u4ef6\u5bb9\u79ef\u53ef\u4ee5\u8d8a\u6765\u8d8a\u4e0d\u5927\u3002<\/p>\n

\n\t\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u7684\u7f3a\u9677\uff1a<\/p>\n

\n\t\u76f8\u5bf9\u6027\u4e8e\u4e09\u4ef6\u5957\u7684\u7ebf\u5f62\u7a33\u538b\u7535\u6e90\uff0c\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u5fc5\u987b\u7684\u7535\u5b50\u5668\u4ef6<\/u>\u6bd4\u8f83\u591a\uff0c\u6709\u7684\u5143\u5668\u4ef6\u76f8\u5bf9\u6027\u8fd8\u975e\u5e38\u5927\uff0c\u4f8b\u5982\u7535\u78c1\u7ebf\u5708\u3001\u7535\u5bb9\u5668\uff1b<\/p>\n

\n\t\u9ad8\u9891\u7387\u7684\u5f00\u5173\u566a\u97f3\u8f83\u4e3a\u5927\uff0c\u7535\u5b50\u5668\u4ef6\u7684\u5408\u7406\u5e03\u5c40\u8f83\u4e3a\u91cd\u8981\uff0c\u5b8c\u6210\u7cfb\u7edf\u8f6f\u4ef6\u5fc5\u987b\u7684\u4f4e\u566a\u97f3\u662f\u5341\u5206\u5177\u5907\u8003\u9a8c\u7684\uff1b<\/p>\n

\n\t\u7535\u5b50\u5668\u4ef6\u7684\u91c7\u7528\u4e5f\u5341\u5206\u91cd\u8981\uff0c\u4f8b\u5982MOS\u7ba1\u3001\u50a8\u80fd\u6280\u672f\u7535\u611f\u5668\u3001\u5149\u6ed1\u7535\u5bb9\u5668\u7b49<\/p>\n

\n\t\u7535\u6e90\u5f00\u5173\u7a33\u538b\u7535\u6e90\u4e5f\u662f\u6709\u4e0d\u4e00\u6837\u7684\u79cd\u7c7b\uff0c\u4f9d\u636e\u952e\u5165\u7535\u6d41\u548c\u8f93\u51fa\u7535\u538b\u7684\u611f\u60c5\u5206\uff1a<\/p>\n

\n\tBuck\u578b – \u964d\u8840\u538b<\/p>\n

\n\tBoost\u578b – \u53d8\u538b<\/p>\n

\n\tBuck Boost – \u65e2\u53ef\u4ee5\u53d8\u538b\u8fd8\u53ef\u4ee5\u964d\u8840\u538b<\/p>\n

 <\/p>\n

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