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SW&#xff0c;\u4e0d\u80fd\u62ff\u6765\u5f53\u4e94\u4f0f\u7aef\u3002\u7535\u611f\u548c\u7535\u5bb9\u628a\u8109\u51b2\u80fd\u91cf\u9001\u6210\u8f83\u5e73\u7a33\u7684\u8f93\u51fa&#xff0c;\u53cd\u9988\u811a\u4ece\u771f\u6b63\u7684\u8f93\u51fa\u7aef\u53d6\u6837&#xff0c;\u8c03\u6574\u5f00\u5173\u884c\u4e3a\u3002\u5177\u4f53\u6ce2\u5f62\u3001\u7eb9\u6ce2\u548c\u6e29\u5347\u8981\u9760\u5b9e\u7269\u6d4b&#xff0c;\u4e0d\u80fd\u4ece\u9759\u6001\u56fe\u63a8\u51fa\u5df2\u7ecf\u8fbe\u6807\u3002<\/p>\n<p>\u5c0f\u718a\u4e00\u624b\u62ff\u6c34\u6876&#xff0c;\u4e00\u624b\u5e26\u7740\u7eff\u65d7\u548c\u7ea2\u65d7&#xff0c;\u4ece\u5199\u7740\u5341\u4e8c\u4f0f\u7684\u4ed3\u5e93\u8d70\u5411\u5199\u7740\u4e94\u4f0f\u7684\u6c34\u6c60\u3002\u7eff\u65d7\u4e3e\u8d77&#xff0c;\u7ba1\u7406\u5458\u5f00\u95e8&#xff0c;\u6c34\u6d41\u7ed9\u6876\u52a0\u901f&#xff1b;\u7ea2\u65d7\u4e3e\u8d77&#xff0c;\u95e8\u5173\u4e0a&#xff0c;\u4f46\u6876\u91cc\u7684\u6c34\u4ecd\u6cbf\u53e6\u4e00\u6761\u8def\u6d41\u5411\u6c34\u6c60\u3002\u56de\u5230\u7535\u8def&#xff0c;\u7ba1\u7406\u5458\u662f LM2596 \u5185\u90e8\u5f00\u5173&#xff0c;\u6876\u662f L1 \u7535\u611f&#xff0c;\u53e6\u4e00\u8def\u662f D1 \u7eed\u6d41\u4e8c\u6781\u7ba1&#xff0c;\u6c34\u6c60\u8fb9\u7684\u7f13\u51b2\u7f50\u662f COUT\u3002\u4e24\u9762\u65d7\u8868\u793a\u63a5\u901a\u548c\u65ad\u5f00\u4e24\u4e2a\u9636\u6bb5&#xff0c;\u4e0d\u662f\u5b9e\u9645\u5e03\u7ebf&#xff1b;\u4e0d\u80fd\u628a\u6545\u4e8b\u91cc\u7684\u6c34\u901f\u548c\u7535\u5b50\u79fb\u52a8\u901f\u5ea6\u4e00\u4e00\u5bf9\u5e94\u3002\u5173\u952e\u662f&#xff1a;\u5f00\u5173\u65ad\u5f00\u4e0d\u7b49\u4e8e\u7535\u611f\u7535\u6d41\u7acb\u523b\u5f52\u96f6\u3002<\/p>\n<h3>\u4e25\u683c\u6309\u540c\u4e00\u4e2a\u5c01\u88c5\u7248\u672c\u753b\u63a5\u7ebf<\/h3>\n<p>\u672c\u4f8b\u4f7f\u7528 TI LM2596T-5.0\/NOPB\u3001TO-220 \u4e94\u811a\u56fa\u5b9a\u4e94\u4f0f\u7248\u672c&#xff0c;\u5e76\u91c7\u7528 TI \u8d44\u6599 SNVS124G Rev G \u7684 Figure 9-10 \u975e\u540c\u6b65\u56fa\u5b9a\u8f93\u51fa\u62d3\u6251\u3002Table 6-1 \u89c4\u5b9a&#xff1a;\u4e00\u811a VIN\u3001\u4e8c\u811a Output \u5373 SW\u3001\u4e09\u811a Ground\u3001\u56db\u811a Feedback\u3001\u4e94\u811a ON\/OFF\u3002\u8d44\u6599\u793a\u610f\u7684\u5916\u90e8\u5668\u4ef6\u5305\u62ec CIN 470 \u00b5F\/50 V \u8f93\u5165\u7535\u89e3\u3001L1 68 \u00b5H\/L38 \u7535\u611f\u3001D1 1N5825 \u8096\u7279\u57fa\u548c COUT 220 \u00b5F\/25 V \u8f93\u51fa\u7535\u89e3\u3002\u5b83\u4eec\u662f\u8d44\u6599\u56fe\u4e2d\u7684\u4e00\u7ec4\u660e\u786e\u5668\u4ef6&#xff0c;\u4e0d\u7b49\u4e8e\u590d\u5236\u5230\u4efb\u610f PCB\u3001\u4efb\u610f\u8d1f\u8f7d\u548c\u4efb\u610f\u6e29\u5ea6\u4e0b\u90fd\u4fdd\u8bc1\u5408\u683c\u3002<\/p>\n<p>\u53ea\u7528\u4e00\u53f0\u4f4e\u538b\u3001\u9650\u6d41\u7684\u5341\u4e8c\u4f0f\u76f4\u6d41\u6e90\u4f5c\u8f93\u5165\u3002\u7535\u6e90\u6b63\u6781\u63a5 pin1 VIN&#xff0c;\u4e5f\u63a5 CIN \u6b63\u7aef&#xff1b;CIN \u8d1f\u7aef\u63a5\u516c\u5171\u5730\u3002pin2 SW \u540c\u65f6\u63a5 L1 \u7b2c\u4e00\u7aef\u548c D1 \u7684\u9634\u6781&#xff0c;D1 \u9633\u6781\u63a5\u5730&#xff1b;L1 \u7b2c\u4e8c\u7aef\u5f62\u6210\u771f\u6b63\u7684 VOUT\u3002VOUT \u63a5 COUT \u6b63\u7aef\u3001\u56fa\u5b9a\u4e94\u4f0f\u7248\u672c\u7684 pin4 Feedback\u3001\u6559\u5b66\u8d1f\u8f7d\u7b2c\u4e00\u7aef&#xff1b;COUT \u8d1f\u7aef\u548c\u8d1f\u8f7d\u7b2c\u4e8c\u7aef\u90fd\u56de\u516c\u5171\u5730\u3002pin3 Ground \u4e0e pin5 ON\/OFF \u4e5f\u63a5\u516c\u5171\u5730&#xff1b;TI Table 6-1 \u5141\u8bb8\u4e94\u811a\u63a5\u5730\u4ee5\u4fdd\u6301\u5f00\u542f\u3002\u7535\u6e90\u8d1f\u7aef\u540c\u6837\u63a5\u8fd9\u4e2a\u4f4e\u538b\u516c\u5171\u5730\u3002\u8fd9\u4e0d\u662f\u53ef\u4ee5\u628a\u5341\u4e8c\u4f0f\u6b63\u6781\u8bef\u63a5\u4e94\u811a\u6216\u56db\u811a\u7684\u8bb8\u53ef\u3002\u65ad\u7535\u540e\u6309\u4e8c\u6781\u7ba1\u6761\u7eb9\u3001\u7535\u89e3\u6b63\u8d1f\u4e0e TO-220 \u9876\u89c6\u56fe\u9010\u70b9\u6838\u5bf9&#xff0c;\u4e0d\u80fd\u7531\u4e00\u5f20\u5668\u4ef6\u5916\u89c2\u63d2\u753b\u731c\u811a\u4f4d\u3002<\/p>\n<p>\u56fe\u4e2d\u52a0\u4e00\u53ea 25 \u03a9\/2 W \u7535\u963b\u4f5c\u6559\u5b66\u8d1f\u8f7d&#xff1a;\u5982\u679c\u8f93\u51fa\u6070\u597d\u4e3a\u4e94\u4f0f&#xff0c;\u6b27\u59c6\u5b9a\u5f8b\u7ed9 I&#061;5 V\u00f725 \u03a9&#061;0.2 A&#xff1b;\u7535\u963b\u529f\u8017 P&#061;5\u00b2\u00f725&#061;1 W&#xff0c;\u9009 2 W \u989d\u5b9a\u662f\u8ba9\u6559\u5b66\u8d1f\u8f7d\u989d\u5b9a\u503c\u9ad8\u4e8e\u7b97\u4f8b\u529f\u8017\u3002\u8fd9\u662f\u4eba\u4e3a\u9009\u7684\u4f4e\u538b\u8d1f\u8f7d\u548c\u8ba1\u7b97&#xff0c;\u975e TI \u5b98\u65b9\u6f14\u793a\u677f\u9ed8\u8ba4\u8d1f\u8f7d&#xff0c;\u4e5f\u4e0d\u662f\u5df2\u6d4b\u5f97\u7684\u7535\u538b\u3001\u7535\u6d41\u6216\u7535\u963b\u8868\u9762\u6e29\u5ea6\u3002\u7535\u963b\u5b9e\u9645\u4ecd\u4f1a\u53d1\u70ed&#xff0c;\u5fc5\u987b\u56fa\u5b9a\u5728\u9694\u70ed\u53f0\u9762&#xff0c;\u4e0d\u80fd\u5f92\u624b\u957f\u65f6\u95f4\u63a5\u89e6&#xff1b;\u901a\u7535\u524d\u8981\u786e\u8ba4\u771f\u5b9e\u7535\u963b\u548c\u529f\u7387\u7b49\u7ea7\u3002\u8d44\u6599\u7684\u4e94\u4f0f\u8f93\u51fa\u89c4\u683c\u662f\u5728\u7ed9\u5b9a VIN\u3001\u8d1f\u8f7d\u53ca\u70ed\u6761\u4ef6\u4e0b\u6d4b\u5b9a&#xff0c;\u4e0d\u5e94\u628a\u67d0\u4e00\u6761\u4ef6\u7684\u4fdd\u8bc1\u5077\u6362\u7ed9\u8fd9\u5f20\u672a\u5236\u4f5c\u7684\u677f\u3002<\/p>\n<h3>\u4e24\u4e2a\u5f00\u5173\u77ac\u95f4&#xff0c;\u5206\u522b\u8ffd\u4e00\u5708\u7535\u6d41<\/h3>\n<p>\u7b2c\u4e00\u77ac\u95f4\u662f\u5185\u5f00\u5173\u63a5\u901a\u3002\u4f4e\u538b\u7535\u6e90\u6b63\u7aef\u7ecf VIN\u3001\u5185\u90e8\u5f00\u5173\u3001SW\u3001\u7535\u611f L1 \u5230 VOUT&#xff0c;\u5411\u8d1f\u8f7d\u548c\u8f93\u51fa\u7535\u5bb9\u9001\u80fd&#xff0c;\u518d\u7531\u516c\u5171\u5730\u56de\u5230\u7535\u6e90\u3002\u7535\u611f\u4e24\u7aef\u5b58\u5728\u4f7f\u7535\u6d41\u4e0a\u5347\u7684\u7535\u538b&#xff0c;\u78c1\u573a\u50a8\u5b58\u80fd\u91cf&#xff1b;\u8fd9\u65f6 D1 \u7684\u9634\u6781\u4f4d\u4e8e\u8f83\u9ad8\u7535\u4f4d&#xff0c;\u4e8c\u6781\u7ba1\u4e0d\u627f\u62c5\u4e3b\u8981\u5bfc\u901a\u8def\u5f84\u3002\u5f00\u5173\u7aef\u770b\u89c1\u7684\u662f\u63a5\u8fd1\u8f93\u5165\u7535\u4f4d\u7684\u8109\u51b2\u533a\u6bb5&#xff0c;\u800c\u4e0d\u662f\u7a33\u5b9a\u7684\u4e94\u4f0f\u3002\u6b64\u5904\u2018\u63a5\u8fd1\u2019\u4e0d\u80fd\u5f53\u6210\u672a\u7ecf\u91cf\u6d4b\u7684\u5177\u4f53 SW \u7535\u538b&#xff0c;\u5185\u90e8\u5f00\u5173\u6709\u538b\u964d\u548c\u52a8\u6001\u8fc7\u7a0b\u3002<\/p>\n<p>\u7b2c\u4e8c\u77ac\u95f4\u662f\u5185\u5f00\u5173\u65ad\u5f00\u3002\u7535\u611f\u7535\u6d41\u4e0d\u80fd\u77ac\u95f4\u8df3\u6210\u96f6&#xff0c;\u56e0\u6b64\u5b83\u7ee7\u7eed\u671d\u8d1f\u8f7d\u65b9\u5411\u6d41&#xff1b;SW \u8282\u70b9\u88ab\u62c9\u4f4e\u5230\u4f7f D1 \u5bfc\u901a&#xff0c;\u7535\u6d41\u53ef\u4ece\u516c\u5171\u5730\u7ecf\u8fc7 D1 \u9633\u6781\u3001\u9634\u6781&#xff0c;\u518d\u7ecf SW\u3001L1\u3001VOUT\u3001\u8d1f\u8f7d\u56de\u516c\u5171\u5730\u3002\u8fd9\u4e2a\u7eed\u6d41\u56de\u8def\u662f\u5173\u952e&#xff1a;D1 \u4e0d\u662f\u8f93\u51fa\u6574\u6d41\u524d\u7684\u989d\u5916\u7535\u6e90&#xff0c;\u4e5f\u4e0d\u662f\u5b89\u5168\u7ee7\u7535\u5668\u3002\u82e5\u628a D1 \u9634\u9633\u6781\u53cd\u63a5&#xff0c;\u4e0a\u7535\u53ef\u80fd\u5f62\u6210\u9519\u8bef\u7684\u7535\u6d41\u8def\u5f84&#xff0c;\u4e0d\u80fd\u4ee5\u2018\u53cd\u6b63\u53ea\u662f\u4f4e\u538b\u2019\u7ee7\u7eed\u8bd5\u3002\u8f93\u51fa\u7535\u5bb9\u5728\u8d1f\u8f7d\u9700\u6c42\u548c\u7535\u611f\u9001\u6d41\u4e0d\u5b8c\u5168\u4e00\u81f4\u7684\u77ac\u95f4\u653e\u7535\u6216\u5145\u7535&#xff0c;\u51cf\u5c0f\u53d8\u5316&#xff0c;\u4f46\u5b83\u4e5f\u6709 ESR\u3001\u989d\u5b9a\u7535\u538b\u548c\u5bff\u547d\u6761\u4ef6&#xff0c;\u4e0d\u80fd\u628a\u5b83\u79f0\u4f5c\u7edd\u5bf9\u96f6\u7eb9\u6ce2\u3002<\/p>\n<p>\u7b2c\u4e09\u6b65\u662f\u53cd\u9988\u3002\u56fa\u5b9a\u4e94\u4f0f\u578b\u53f7\u7684 pin4 \u4ece VOUT \u76f4\u63a5\u611f\u6d4b&#xff0c;\u4e0d\u63a5\u5230 SW&#xff0c;\u4e5f\u4e0d\u7701\u7565\u3002\u8f93\u5165\u6216\u8d1f\u8f7d\u53d8\u5316\u4f7f\u8f93\u51fa\u504f\u79bb\u76ee\u6807\u65f6&#xff0c;\u82af\u7247\u7684\u63a7\u5236\u73af\u4f1a\u8c03\u8282\u5f00\u5173\u63a5\u901a\u6bd4\u4f8b&#xff0c;\u4ee4\u8f93\u51fa\u671d\u76ee\u6807\u8fd4\u56de\u3002\u628a\u5341\u4e8c\u4f0f\u8f93\u5165\u548c\u4e94\u4f0f\u76ee\u6807\u4ee3\u5165\u7406\u60f3\u8fde\u7eed\u6a21\u5f0f\u5360\u7a7a\u6bd4\u516c\u5f0f D\u2248VOUT\/VIN&#xff0c;\u5f97\u5230 5\u00f712\u22480.417&#xff0c;\u7ea6\u767e\u5206\u4e4b\u56db\u5341\u4e8c\u3002\u5b83\u53ea\u8bf4\u660e\u2018\u63a5\u901a\u65f6\u95f4\u5927\u7ea6\u5360\u591a\u5c11\u2019\u7684\u7b2c\u4e00\u5c42\u76f4\u89c9&#xff1b;\u771f\u5b9e\u4e8c\u6781\u7ba1\u538b\u964d\u3001\u5f00\u5173\u635f\u8017\u3001\u5de5\u4f5c\u6a21\u5f0f\u548c\u53cd\u9988\u54cd\u5e94\u90fd\u8ba9\u5b9e\u9645 D \u4e0d\u7b49\u4e8e 0.417\u3002\u5f00\u5173\u9891\u7387\u8d44\u6599\u5178\u578b\u4e3a 150 kHz&#xff0c;\u4f46\u4e0d\u80fd\u76f4\u63a5\u7531\u8fd9\u4e24\u4e2a\u6570\u5b57\u5ba3\u79f0\u672c\u673a\u8f93\u51fa\u6ce2\u5f62\u5df2\u7ecf\u6d4b\u5f97\u6216\u8d1f\u8f7d\u53ef\u8fbe\u4e09\u5b89\u3002<\/p>\n<h3>\u4e09\u4e2a\u6d4b\u70b9&#xff0c;\u600e\u4e48\u9a8c\u8bc1\u800c\u4e0d\u4f24\u5668\u4ef6<\/h3>\n<p>\u5148\u4e0d\u901a\u7535&#xff0c;\u68c0\u67e5\u5341\u4e8c\u4f0f\u8f93\u5165\u6781\u6027\u3001CIN\/COUT \u6781\u6027\u3001D1 \u9634\u6781\u5230 SW\u3001L1 \u4f4d\u4e8e SW \u4e0e VOUT \u4e4b\u95f4\u3001pin4 \u5230 VOUT\u3001pin5 \u5230\u5730&#xff0c;\u5e76\u786e\u8ba4\u6ca1\u6709\u628a\u8f93\u51fa\u4e0e\u8f93\u5165\u76f4\u63a5\u77ed\u63a5\u3002\u7535\u6e90\u8bbe\u4e3a\u5408\u9002\u7684\u9650\u6d41\u503c&#xff0c;\u5148\u7528\u4e07\u7528\u8868\u76f4\u6d41\u7535\u538b\u6863\u91cf VIN \u5bf9\u516c\u5171\u5730\u548c VOUT \u5bf9\u516c\u5171\u5730&#xff1b;\u82e5\u8f93\u5165\u7535\u6e90\u88ab\u62c9\u5165\u9650\u6d41\u3001\u5668\u4ef6\u5f02\u5e38\u53d1\u70ed\u6216\u8f93\u51fa\u5f02\u5e38&#xff0c;\u7acb\u5373\u65ad\u7535\u68c0\u67e5\u3002\u4e0d\u8981\u628a\u4e07\u7528\u8868\u7535\u6d41\u6863\u5e76\u8054\u8de8\u7535\u6e90\u3002\u771f\u6b63\u710a\u63a5\u65f6\u9700\u9075\u5faa TI \u7684\u8f93\u5165\u65c1\u8def\u4e0e\u9ad8\u9891\u56de\u8def\u5e03\u5c40\u8981\u6c42&#xff1b;\u4e00\u6392\u5f88\u957f\u7684\u9762\u5305\u677f\u5bfc\u7ebf\u4e0d\u8db3\u4ee5\u8bc1\u660e 150 kHz \u7535\u6e90\u7a33\u5b9a\u3002<\/p>\n<p>\u5982\u6709\u4e0e\u4f9b\u7535\u65b9\u5f0f\u5339\u914d\u7684\u793a\u6ce2\u5668&#xff0c;\u7528\u7ecf\u8fc7\u6838\u5bf9\u7684\u53c2\u8003\u5730\u6216\u9002\u5f53\u5dee\u5206\u63a2\u5934\u5206\u522b\u89c2\u5bdf VIN\u3001SW\u3001VOUT\u3002SW \u9884\u8ba1\u6709\u9ad8\u901f\u5f00\u5173\u8109\u51b2&#xff0c;VOUT \u9884\u8ba1\u662f\u4ee5\u4e94\u4f0f\u4e3a\u76ee\u6807\u4e14\u5e26\u7eb9\u6ce2\u7684\u8f83\u5e73\u7a33\u7535\u538b&#xff1b;\u8981\u8bb0\u5f55\u5b9e\u9645\u63a2\u5934\u63a5\u6cd5\u3001\u8d1f\u8f7d\u503c\u3001\u65f6\u57fa\u548c\u6ce2\u5f62&#xff0c;\u624d\u53ef\u8bf4\u770b\u5230\u4f55\u79cd\u7535\u538b\u3002\u4e0d\u53ef\u628a\u63a5\u5730\u5939\u968f\u610f\u5939\u5230 SW&#xff0c;\u90a3\u4f1a\u9020\u6210\u77ed\u8def\u98ce\u9669\u3002\u518d\u6539\u53d8\u6559\u5b66\u8d1f\u8f7d\u5e76\u770b\u6062\u590d\u8fc7\u7a0b&#xff0c;\u624d\u80fd\u8ba8\u8bba\u53cd\u9988\u52a8\u6001&#xff1b;\u6ca1\u6709\u8d1f\u8f7d\u53d8\u5316\u8bb0\u5f55&#xff0c;\u753b\u9762\u53ea\u80fd\u8bf4\u2018\u63a7\u5236\u73af\u9884\u671f\u8c03\u8282\u2019\u3002\u89c6\u9891\u4e2d\u7684\u9ec4\u70b9\u79fb\u52a8\u4ec5\u8868\u793a\u7535\u6d41\u8def\u5f84\u5207\u6362&#xff0c;\u4e0d\u662f\u7535\u5b50\u6216\u78c1\u901a\u7684\u5b9e\u6d4b\u8f68\u8ff9\u3002<\/p>\n<h3>\u9002\u7528\u8fb9\u754c&#xff1a;\u4e0d\u662f\u73b0\u6210\u7684\u4e09\u5b89\u7535\u6e90\u4ea7\u54c1<\/h3>\n<p>TI \u624b\u518c\u7684\u4e09\u5b89\u80fd\u529b\u6709\u5177\u4f53\u8f93\u5165\u3001\u6563\u70ed\u3001\u5668\u4ef6\u548c\u677f\u7ea7\u8bbe\u8ba1\u6761\u4ef6\u3002\u7535\u611f\u4e0d\u80fd\u53ea\u770b 68 \u00b5H&#xff0c;\u8fd8\u8981\u770b\u7535\u6d41\u989d\u5b9a\u3001\u9971\u548c\u548c\u635f\u8017&#xff1b;D1 \u8981\u6838\u67e5\u5e73\u5747\u4e0e\u5cf0\u503c\u7535\u6d41\u53ca\u70ed&#xff1b;CIN\/COUT \u8981\u6838\u67e5\u8010\u538b\u3001ESR\u3001\u7eb9\u6ce2\u7535\u6d41\u548c\u4f4d\u7f6e\u3002\u5916\u90e8\u8d1f\u8f7d\u53d1\u751f\u77ed\u8def\u65f6\u4e0d\u80fd\u9760\u52a8\u753b\u63a8\u65ad\u4fdd\u62a4\u6548\u679c\u3002Figure 9-10 \u7ed9\u51fa\u771f\u5b9e\u62d3\u6251&#xff0c;\u4f46\u5982\u679c\u8981\u505a 12 V\u30015 V\u30013 A \u7684\u5b9e\u9645\u4ea7\u54c1&#xff0c;\u5fc5\u987b\u4f9d\u636e\u540c\u624b\u518c\u7b2c 9.2 \u8282\u7684\u7535\u611f\u4e0e\u7535\u5bb9\u9009\u578b\u6b65\u9aa4\u53ca PCB \u5e03\u5c40\u91cd\u65b0\u8bbe\u8ba1&#xff0c;\u5e76\u7528\u5b9e\u7269\u9a8c\u8bc1\u3002\u672c\u8bfe\u53ea\u7528 0.2 A \u4f4e\u538b\u793a\u4f8b\u8bb2\u56e0\u679c&#xff1b;\u4e0d\u63a5\u5e02\u7535\u3001\u4e0d\u628a\u672a\u6838\u51c6\u7684\u4e94\u4f0f\u63a5\u5165\u67d0\u5757\u5355\u7247\u673a\u5f15\u811a&#xff0c;\u4e5f\u4e0d\u628a\u975e\u540c\u6b65 D1 \u7535\u8def\u8bf4\u6210\u540c\u6b65\u6574\u6d41\u65b9\u6848\u3002\u6587\u672b C11 \u7a0b\u5e8f\u590d\u7b97\u7406\u60f3\u5360\u7a7a\u6bd4\u548c\u8d1f\u8f7d\u7b97\u4f8b&#xff0c;\u5e76\u975e\u82af\u7247\u4eff\u771f\u5668\u6216\u5b9e\u6d4b\u62a5\u544a\u3002<\/p>\n<h3>\u9010\u7ebf\u63a5\u7ebf\u6e05\u5355<\/h3>\n<ul>\n<li>12V \u9650\u6d41\u76f4\u6d41\u6e90 &#043; \u2192 LM2596T-5.0 pin1 VIN&#xff1a;\u4f4e\u538b\u8f93\u5165&#xff1b;\u5382\u5bb6 Figure 9-10 \u5178\u578b\u56fa\u5b9a\u8f93\u51fa\u62d3\u6251<\/li>\n<li>12V \u9650\u6d41\u76f4\u6d41\u6e90 &#043; \u2192 CIN 470\u00b5F\/50V \u6b63\u7aef&#xff1a;\u8f93\u5165\u53bb\u8026&#xff0c;\u7535\u89e3\u6781\u6027\u4e0d\u53ef\u53cd<\/li>\n<li>CIN \u8d1f\u7aef \u2192 \u516c\u5171 GND&#xff1a;\u4e0e\u7535\u6e90\u8d1f\u7aef\u3001\u82af\u7247 pin3\u3001\u8f93\u51fa\u8d1f\u7aef\u540c\u4e00\u70b9<\/li>\n<li>LM2596T-5.0 pin2 Output\/SW \u2192 L1 68\u00b5H \u7b2c\u4e00\u7aef&#xff1a;\u9ad8\u9891\u5f00\u5173\u8282\u70b9&#xff0c;\u4e0d\u80fd\u5f53\u6210\u7a33\u538b\u8f93\u51fa<\/li>\n<li>LM2596T-5.0 pin2 Output\/SW \u2192 D1 1N5825 \u9634\u6781&#xff1a;\u65ad\u5f00\u65f6\u63d0\u4f9b\u7eed\u6d41&#xff1b;\u9634\u6781\u6761\u7eb9\u671d SW<\/li>\n<li>D1 1N5825 \u9633\u6781 \u2192 \u516c\u5171 GND&#xff1a;\u4e0e SW \u65b9\u5411\u4e0d\u53ef\u53cd\u63a5<\/li>\n<li>L1 68\u00b5H \u7b2c\u4e8c\u7aef \u2192 VOUT 5V \u8282\u70b9&#xff1a;\u8f93\u51fa\u8282\u70b9&#xff0c;\u975e\u8f93\u5165\u8282\u70b9<\/li>\n<li>VOUT 5V \u8282\u70b9 \u2192 COUT 220\u00b5F\/25V \u6b63\u7aef&#xff1a;\u8f93\u51fa\u7f13\u51b2&#xff0c;\u7535\u89e3\u6781\u6027\u4e0d\u53ef\u53cd<\/li>\n<li>COUT \u8d1f\u7aef \u2192 \u516c\u5171 GND&#xff1a;\u7d27\u9760\u529f\u7387\u56de\u8def<\/li>\n<li>VOUT 5V \u8282\u70b9 \u2192 LM2596T-5.0 pin4 Feedback&#xff1a;\u56fa\u5b9a5V\u7248\u76f4\u63a5\u611f\u6d4b\u8f93\u51fa<\/li>\n<li>VOUT 5V \u8282\u70b9 \u2192 RLOAD 25\u03a9\/2W \u7b2c\u4e00\u7aef&#xff1a;5V \u7406\u60f3\u65f6 I&#061;5\/25&#061;0.2A&#xff0c;P&#061;5\u00b2\/25&#061;1W&#xff0c;\u975e\u5b9e\u6d4b<\/li>\n<li>RLOAD 25\u03a9\/2W \u7b2c\u4e8c\u7aef \u2192 \u516c\u5171 GND&#xff1a;\u4f4e\u538b\u6559\u5b66\u8d1f\u8f7d&#xff1b;\u5143\u4ef6\u989d\u5b9a2W\u5927\u4e8e\u8ba1\u7b971W<\/li>\n<li>LM2596T-5.0 pin3 Ground \u2192 \u516c\u5171 GND&#xff1a;\u540c\u4e00\u4f4e\u538b\u56de\u8def<\/li>\n<li>LM2596T-5.0 pin5 ON\/OFF \u2192 \u516c\u5171 GND&#xff1a;\u6309 TI Table 6-1 \u63a5\u5730\u4f7f\u80fd&#xff1b;\u7edd\u4e0d\u63a5 12V<\/li>\n<li>12V \u9650\u6d41\u76f4\u6d41\u6e90 &#8211; \u2192 \u516c\u5171 GND&#xff1a;\u7535\u6e90\u8fd4\u56de\u7aef<\/li>\n<\/ul>\n<h3>\u8ba1\u7b97\u4e0e\u5b9e\u65bd\u8fb9\u754c<\/h3>\n<ul>\n<li>TI LM2596 datasheet SNVS124G Rev G Table 6-1&#xff1a;TO-220 pin1 VIN\u3001pin2 Output\u3001pin3 GND\u3001pin4 Feedback\u3001pin5 ON\/OFF&#xff1b;pin5 \u63a5\u5730\u53ef\u4fdd\u6301\u5f00\u542f<\/li>\n<li>\u540c\u624b\u518c Figure 9-10 \u56fa\u5b9a\u8f93\u51fa\u964d\u538b\u793a\u4f8b&#xff1a;CIN 470\u00b5F\/50V\u3001COUT 220\u00b5F\/25V\u3001D1 1N5825 5A40V \u8096\u7279\u57fa\u3001L1 68\u00b5H\/L38&#xff1b;\u672c\u4f8b\u4e0d\u5192\u79f0\u8fd9\u4e2a\u793a\u610f\u503c\u8986\u76d6\u4efb\u610f\u8d1f\u8f7d\u4e0e\u677f\u6750<\/li>\n<li>\u672c\u4f8b\u9009 LM2596-5.0 \u56fa\u5b9a\u8f93\u51fa&#xff0c;\u975e\u540c\u6b65&#xff1b;\u5185\u5f00\u5173\u63a5\u901a\u7531\u8f93\u5165\u5411\u7535\u611f\u9001\u80fd&#xff0c;\u65ad\u5f00\u65f6\u4e8c\u6781\u7ba1\u7ed9\u7535\u611f\u7eed\u6d41&#xff0c;\u53cd\u9988\u4ece VOUT \u95ed\u73af\u6821\u6b63<\/li>\n<li>12V \u4e0e\u76ee\u68075V \u7684 5\/12\u22480.417 \u662f\u7406\u60f3\u5360\u7a7a\u6bd4\u6559\u5b66\u4f30\u7b97&#xff1b;\u5668\u4ef6\u538b\u964d\u3001\u7eb9\u6ce2\u3001\u8d1f\u8f7d\u548c\u63a7\u5236\u73af\u4f7f\u771f\u5b9e\u5360\u7a7a\u6bd4\u4e0d\u540c<\/li>\n<li>RLOAD 25\u03a9\/2W \u4e0e 0.2A\u30011W \u662f\u672c\u4f8b\u4f4e\u538b\u6559\u5b66\u9009\u62e9\u548c\u786e\u5b9a\u6027\u8ba1\u7b97&#xff0c;\u4e0d\u662f TI \u5b98\u65b9\u5957\u4ef6\u7684\u6307\u5b9a\u8d1f\u8f7d&#xff0c;\u4e5f\u975e\u5b9e\u6d4b<\/li>\n<li>\u5f00\u5173\u7535\u6e90\u7684\u989d\u5b9a\u3001\u7535\u5bb9 ESR\u3001\u7535\u611f\u9971\u548c\u3001\u4e8c\u6781\u7ba1\u70ed\u53ca PCB \u56de\u8def\u987b\u6309 TI 9.2 \u8282\u91cd\u65b0\u6838\u7b97\u548c\u5b9e\u7269\u9a8c\u8bc1&#xff1b;\u52a8\u753b\u4e0d\u7b49\u4e8e\u53ef\u710a\u63a5\u91cf\u4ea7\u677f<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u53c2\u6570\u548c\u6570\u503c\u662f\u672c\u4f8b\u9009\u62e9\u6216\u53ef\u590d\u7b97\u8ba1\u7b97&#xff1b;\u5b9e\u9645\u6d4b\u91cf\u524d&#xff0c;\u5e94\u5148\u68c0\u67e5\u7535\u6e90\u6781\u6027\u3001\u516c\u5171\u5730\u3001\u5143\u4ef6\u989d\u5b9a\u503c\u3001\u4eea\u5668\u63a2\u5934\u8fde\u63a5\u3002<\/p>\n<h3>\u5b8c\u6574\u53ef\u8fd0\u884c\u7684\u6838\u5fc3\u7b97\u4f8b\u4e0e\u9a8c\u6536<\/h3>\n<p>\u4ee5\u4e0b C11 \u7a0b\u5e8f\u53ef\u5728\u7535\u8111\u4e0a\u7528 C \u7f16\u8bd1\u5668\u5355\u72ec\u7f16\u8bd1\u8fd0\u884c&#xff0c;\u7528\u6765\u590d\u7b97\u72b6\u6001\u6216\u6570\u503c&#xff1b;\u5b83\u4e0d\u662f\u5df2\u914d\u7f6e GPIO\u3001ADC\u3001\u5b9a\u65f6\u5668\u548c\u9a71\u52a8\u7684\u5f00\u53d1\u677f\u56fa\u4ef6\u3002\u79fb\u690d\u5230\u5b9e\u677f\u65f6\u5e94\u6309\u524d\u8ff0\u63a5\u7ebf\u914d\u7f6e\u5916\u8bbe\u3001\u68c0\u67e5\u8bfb\u53d6\u9519\u8bef&#xff0c;\u5e76\u53e6\u505a\u5b9e\u6d4b\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token comment\">\/* \u7eaf\u6570\u5b57\u6559\u5b66\u6a21\u578b&#xff0c;\u4e0d\u63a7\u5236\u771f\u5b9e LM2596&#xff0c;\u4e5f\u4e0d\u4ee3\u8868\u5b9e\u6d4b\u5360\u7a7a\u6bd4\u3002 *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">double<\/span> vin<span class=\"token operator\">&#061;<\/span><span class=\"token number\">12.0<\/span><span class=\"token punctuation\">,<\/span> target<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5.0<\/span><span class=\"token punctuation\">,<\/span> r<span class=\"token operator\">&#061;<\/span><span class=\"token number\">25.0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">double<\/span> ideal_duty<span class=\"token operator\">&#061;<\/span>target<span class=\"token operator\">\/<\/span>vin<span class=\"token punctuation\">,<\/span> load_i<span class=\"token operator\">&#061;<\/span>target<span class=\"token operator\">\/<\/span>r<span class=\"token punctuation\">,<\/span> load_p<span class=\"token operator\">&#061;<\/span>target<span class=\"token operator\">*<\/span>target<span class=\"token operator\">\/<\/span>r<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ideal_duty<span class=\"token operator\">&lt;<\/span><span class=\"token number\">0.416<\/span> <span class=\"token operator\">||<\/span> ideal_duty<span class=\"token operator\">&gt;<\/span><span class=\"token number\">0.418<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>load_i<span class=\"token operator\">!&#061;<\/span><span class=\"token number\">0.2<\/span> <span class=\"token operator\">||<\/span> load_p<span class=\"token operator\">!&#061;<\/span><span class=\"token number\">1.0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;ideal duty %.3f; design load %.1f A, %.1f W; measure before claiming output\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n           ideal_duty<span class=\"token punctuation\">,<\/span>load_i<span class=\"token punctuation\">,<\/span>load_p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u9a8c\u6536\u65f6\u540c\u65f6\u8bb0\u5f55\u8f93\u5165\u3001\u5173\u952e\u8282\u70b9\u7535\u538b\u6216\u6ce2\u5f62\u3001\u7a0b\u5e8f\u8f93\u51fa&#xff1b;\u82e5\u53d1\u73b0\u4f20\u611f\u5668\u901a\u4fe1\u5931\u8d25\u3001\u8f93\u5165\u8d85\u51fa\u5141\u8bb8\u8303\u56f4\u6216\u6ce2\u5f62\u660e\u663e\u5f02\u5e38&#xff0c;\u5e94\u505c\u6b62\u5e76\u6392\u67e5\u3002<\/p>\n<h3>\u5b98\u65b9\u8d44\u6599<\/h3>\n<ul>\n<li>https:\/\/www.ti.com\/lit\/ds\/symlink\/lm2596.pdf<\/li>\n<li>https:\/\/www.ti.com\/product\/LM2596<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>12\u4f0f\u600e\u6837\u964d\u62105\u4f0f&#xff1f;\u770b\u61c2\u5f00\u5173\u3001\u7535\u611f\u4e0e\u7eed\u6d41\u4e8c\u6781\u7ba1\u672c\u6587\u4e3a\u6559\u5b66\u63a5\u7ebf\u4e0e\u8bbe\u8ba1\u9884\u671f&#xff0c;\u5c1a\u65e0\u5b9e\u7269\u6d4b\u91cf\u8bb0\u5f55&#xff1b;\u4f7f\u7528 NUCLEO-F030R8\u3002\u95ee\u9898<br \/>\n\u5341\u4e8c\u4f0f\u6ca1\u6709\u5148\u53d8\u6210\u4e94\u4f0f\u518d\u8fdb\u82af\u7247\u3002\u964d\u538b\u82af\u7247\u5feb\u901f\u63a5\u901a\u3001\u65ad\u5f00&#xff0c;\u7535\u611f\u548c\u7535\u5bb9\u8ba9\u8f93\u51fa\u8f83\u5e73\u7a33\u3002\u770b\u4e24\u4e2a\u77ac\u95f4&#xff1a;\u63a5\u901a\u65f6\u7535\u6d41\u8d70\u54ea\u91cc&#xff0c;\u65ad\u5f00\u540e\u7535\u611f\u4e3a\u4f55\u8fd8\u80fd\u9001\u7535\u3002<br \/>\n\u7269\u4ef6\u52a8\u4f5c<br \/>\n\u5c0f\u718a\u62ff\u6c34\u6876\u548c\u4e24\u9762\u65d7&#xff0c;\u4ece\u5341\u4e8c\u4f0f\u4ed3\u5e93\u8d70\u5230\u4e94\u4f0f\u6c34\u6c60\u3002\u7eff\u65d7\u4e3e\u8d77&#xff0c;\u7ba1\u7406\u5458\u5f00\u95e8&#xff0c;\u6c34\u6d41\u7ed9\u6876\u52a0\u901f<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[733,100],"topic":[],"class_list":["post-117576","post","type-post","status-publish","format-standard","hentry","category-server","tag-mongodb","tag-100"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>12\u4f0f\u600e\u6837\u964d\u62105\u4f0f\uff1f\u770b\u61c2\u5f00\u5173\u3001\u7535\u611f\u4e0e\u7eed\u6d41\u4e8c\u6781\u7ba1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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