{"id":12383,"date":"2020-08-07T17:28:26","date_gmt":"2020-08-07T09:28:26","guid":{"rendered":"http:\/\/www.ace-pow.com\/?p=12383"},"modified":"2023-01-11T14:07:53","modified_gmt":"2023-01-11T06:07:53","slug":"%e9%94%82%e7%94%b5%e6%b1%a0%e5%85%85%e7%94%b5ic-lp3947","status":"publish","type":"post","link":"http:\/\/www.ace-pow.com\/archives\/12383","title":{"rendered":"\u9502\u7535\u6c60\u5145\u7535IC-LP3947"},"content":{"rendered":"\n

\u9502\u7535\u6c60<\/a>\u5145\u7535IC-LP3947\u662f\u4e00\u6b3e\u5185\u7f6e\u5fae\u5904\u7406\u5668\uff0c\u662f\u529f\u80fd\u5b8c\u5584\u7684\u5355\u8282\u9502\u7535\u6c60\u5145\u7535\u96c6\u6210\u7535\u8def,\u5b83\u5177\u6709\u53ef\u4ee5\u91c7\u7528USB\u63a5\u53e3\u6216AC\u7535\u6e90\u9002\u914d\u5668\u4f9b\u7535,\u5185\u7f6e\u8c03\u6574\u7ba1\u6784\u6210\u7684\u7ebf\u6027\u5145\u7535\u5355\u5143,\u5b83\u53ef\u4ee5\u7528\u4e8e\u5b89\u7a33\u7535\u6e90(LDO\u5f62\u5f0f),\u8f93\u51fa\u7535\u6d41\u53ef\u8fbe1A,\u505c\u6b62\u7535\u538b\u4e3a4.1V\u62164.2V\u7684\u7535\u6c60,\u6052\u6d41\u6052\u538b\u5145\u7535,\u5e76\u53ef\u5bf9\u8fc7\u653e\u7535\u7535\u6c60\u8fdb\u884c\u9884\u5145\u7535,\u5185\u7f6e\u7535\u6c60\u6e29\u5ea6\u68c0\u6d4b,\u7535\u6c60\u6e29\u5ea6\u8fc7\u9ad8\u6216\u8fc7\u4f4e\u65f6,\u5145\u7535\u5668\u81ea\u52a8\u5173\u65ad,\u67095.6\u5c0f\u65f6\u5b89\u5168\u5b9a\u65f6\u5668,\u6709\u8fc7\u6d41\u548c\u8fc7\u70ed\u4fdd\u62a4,\u5145\u7535\u72b6\u51b5\u6307\u793a,\u5145\u7535\u7535\u6d41\u68c0\u6d4b,\u5e76\u8f93\u51fa\u4e0e\u5145\u7535\u7535\u6d41\u6210\u4efd\u989d\u7684\u6a21\u62df\u7535\u538b,\u5668\u6750\u7ed3\u6e29TJ\u57280\u2103\u2264TJ\u226485\u2103\u3002\u89c4\u6a21\u5185,\u5145\u7535\u7cbe\u5ea6\u57281%\u5185,\u8f93\u5165\u7535\u538b\u89c4\u6a21:4.3V\u20146.0V\uff0c\u5728AC\u9002\u914d\u5668\u4f9b\u7535\u65f6\uff0c\u5145\u7535\u7535\u6d41\u8bbe\u5b9a\u89c4\u6a21\u4e3a100mA\u2014750mA\uff0c\u5728USB\u7aef\u53e3\u4f9b\u7535\u65f6\uff0c\u5145\u7535\u7535\u6d41\u8bbe\u5b9a\u89c4\u6a21\u4e3a100-500mA\u3002\u5de5\u4f5c\u6e29\u5ea6\uff1a-40\u2103\u2014+85\u2103\u3002<\/span><\/p>\n\n\n

\n
\"\u9502\u7535\u6c60\u5145\u7535IC-LP3947\"<\/figure><\/div>\n\n\n

\u56fe\u4e3a\u5176\u5f15\u811a\u793a\u610f\u56fe\uff0c\u8be5IC\u53ef\u5e7f\u6cdb\u5e94\u7528\u4e8e\u79fb\u52a8\u7535\u8bdd\uff0c\u6570\u7801\u76f8\u673a\uff0cUSB\u4f9b\u7535\u7684IT\u8bbe\u5907\u548c\u638c\u4e0a\u7535\u5668.LP3947\u5404\u7ba1\u811a\u529f\u80fd\u9610\u660e\u5982\u4e0b\uff1a<\/span><\/p>\n\n\n\n

  • Pin1(EN):\u5145\u7535\u8f93\u5165\u4f7f\u80fd\u7aef\uff0c\u8f93\u5165\u9ad8\u7535\u5e73\u7b54\u5e94\u5145\u7535\uff0c\u4f4e\u7535\u5e73\u5236\u6b62\u5145\u7535\u3002<\/span><\/li>
  • Pin2(SCL):I2C\u4e32\u884c\u63a5\u53e3\u65f6\u949f\u8f93\u5165\u7aef\u3002<\/span><\/li>
  • Pin3(SDA):I2C\u4e32\u884c\u63a5\u53e3\u6570\u636e\u8f93\u5165\/\u8f93\u51fa\u7aef\u3002<\/span><\/li>
  • Pin4(BATT):\u7535\u6c60\u5145\u7535\u8f93\u5165\u7aef\uff0c\u6b64\u7aef\u63a510uF\u9676\u74f7\u7535\u5bb9\u81f3\u5730\u3002<\/span><\/li>
  • Pin5(VT):2.78V\u5b89\u7a33\u7535\u538b\u8f93\u51fa\u7aef\uff0c\u7528\u4e8e\u4e08\u91cf\u7535\u6c60\u6e29\u5ea6\u7684\u5b89\u7a33\u7535\u6e90\u3002<\/span><\/li>
  • Pin6(VBSENSE):\u7535\u6c60\u7535\u538b\u68c0\u6d4b\u7aef\uff0c\u4e0e\u7535\u6c60\u7684\u6b63\u6781\u76f8\u8fde\u3002<\/span><\/li>
  • Pin7(MODE):\u6311\u9009AC\u9002\u914d\u5668\u4f9b\u7535(\u7f6e\u9ad8\u7535\u5e73)\uff0c\u6311\u9009USB\u4f9b\u7535(\u7f6e\u4f4e\u7535\u5e73)\u3002<\/span><\/li>
  • Pin8(Diff-Amp):\u68c0\u6d4b\u5145\u7535\u7535\u6d41\u7684\u5dee\u52a8\u653e\u5927\u5668\u8f93\u51fa\uff0c\u8f93\u51fa\u7535\u538b\u6b63\u6bd4\u4e8e\u5145\u7535\u7535\u6d41\u3002<\/span><\/li>
  • Pin9(Ts):\u591a\u529f\u80fd\u7aef\uff0c\u7535\u6c60\u6e29\u5ea6\u68c0\u6d4b\u8f93\u5165\u7aef\uff0c\u7528\u4e8eLDO\u5f62\u5f0f\/\u5145\u7535\u5668\u5f62\u5f0f\u8f93\u5165\u7aef\uff0c\u82e5\u4e0d\u88c5\u5165\u5145\u7535\u7535\u6c60\uff0c\u5219\u4e3aLDO\u5f62\u5f0f\uff0c\u7528\u4f5c\u4f4e\u538b\u5dee4.1V\u62164.2V\u8f93\u51fa\u7a33\u538b\u5668\u3002<\/span><\/li>
  • Pin10(EOC):\u5185\u90e8\u4e3a\u5f00\u6f0f\u8f93\u51fa\uff0c\u5f53USB\u7aef\u53e3\u6216AC\u9002\u914d\u5668\u88ab\u8fde\u63a5\uff0c\u7535\u6c60\u5df2\u5145\u6ea2\u65f6\uff0c\u6b64\u7aef\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u53ef\u5916\u63a5\u4e00\u9897LED\uff0c\u4eae\u8868\u660e\u7535\u6c60\u5df2\u5145\u6ea2\u3002<\/span><\/li>
  • Pin11(GND):\u5730\u7aef\u3002<\/span><\/li>
  • Pin12(CHG):\u5185\u90e8\u4e3a\u5f00\u6f0f\u8f93\u51fa\uff0c\u5f53USB\u7aef\u53e3\u6216AC\u9002\u914d\u5668\u88ab\u8fde\u63a5\uff0c\u7535\u6c60\u5f00\u7aef\u5145\u7535\uff0c\u6b64\u7aef\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u53ef\u5916\u63a5\u4e00\u9897LED\uff0c\u4eae\u8868\u660e\u7535\u6c60\u5df2\u5f00\u7aef\u5145\u7535\u3002<\/span><\/li>
  • Pin13(ISEL):\u5145\u7535\u5668\u5728USB\u7aef\u53e3\u4f9b\u7535\uff0c\u6b64\u7aef\u63a5\u9ad8\u7535\u5e73\uff0c\u5145\u7535\u7535\u6d41\u4e3a100mA\u6b64\u7aef\u63a5\u4f4e\u7535\u5e73\uff0c\u5145\u7535\u7535\u6d41\u4e3a500mA(\u522b\u7684I2C\u63a5\u53e3\u53ef\u8bbe\u5b9a\u5145\u7535\u7535\u6d41)\u3002<\/span><\/li>
  • Pin14(CHG-IN):\u5145\u7535\u5668\u4f9b\u7535\u8f93\u5165\u7aef\uff0c\u8f93\u5165\u4e00\u4e2a\u7a33\u538b\u6709\u7535\u6d41\u7ea6\u675f\u7684\u7535\u6e90\uff0c\u5728\u6b64\u7aef\u5fc5\u987b\u63a5\u4e00\u4e2a1uF\u9676\u74f7\u7535\u5bb9\u63a5\u5730\u3002<\/span><\/li><\/ul>\n\n\n\n

    \u5145\u7535\u8fc7\u7a0b:LP3947\u7ec4\u6210\u7684\u5145\u7535\u5668\u7535\u8def\u5982\u56fe2\uff0c\u5145\u7535\u8fc7\u7a0b\u53ca\u5145\u7535\u72b6\u51b5\u6307\u793a\u89c1\u56fe3\uff0c\u8d64\u8272LED\u4e3a\u5145\u7535\u6307\u793a\u706f\uff0c\u7eff\u8272LED\u5145\u6ea2\u6307\u793a\u706f\uff0c\u56fe\u4e2d\u7684\u505c\u6b62\u5145\u7535\u7535\u538b\u4e3a4.1V.<\/span><\/p>\n\n\n\n

    \u5145\u7535\u5668\u63a5\u4e0aAC\u9002\u914d\u5668\u6216USB\u7535\u6e90\uff0c\u5145\u7535\u5668\u5f00\u7aef\u5de5\u4f5c\uff0c\u5047\u5982\u8f93\u5165\u7535\u538b\u5728\u4f4e\u9608\u503c\u7535\u538b(\u22654.3V)\u9ad8\u7535\u538b\u9608\u503c\u7535\u538b(\u22646.0V)\u5145\u7535\u5668\u68c0\u6d4b\u5230\u9002\u5408\u7684\u8f93\u5165\u7535\u538b\uff0c\u9884\u5145\u7535\u5f00\u7aef\uff0c\u8d64\u8272LED\u4eae\uff0c\u7eff\u8272LED\u7184.<\/span><\/p>\n\n\n\n

    \u9884\u5145\u7535\u9636\u6bb5\u7684\u5145\u7535\u7535\u6d41\u572840-70mA\u95f4\uff0c\u4f7f\u8fc7\u653e\u7535\u7684\u7535\u6c60\u4ee5\u5c0f\u7535\u6d41\u5b89\u5168\u5145\u7535\uff0c\u7535\u6c60\u7535\u538b\u4e0a\u5347\uff0c\u4e00\u76f4\u5230\u7535\u6c60\u7535\u538b\u4e0a\u5347\u52303.0V\u4ee5\u4e0a\u65f6\uff0c\u9884\u5145\u7535\u9636\u6bb5\u5373\u544a\u7ed3\u675f\uff0c\u5145\u7535\u5b9a\u65f6\u5668\u542f\u52a8\uff0c\u5f00\u7aef\u5145\u7535\u3002<\/span><\/p>\n\n\n\n

    \u5feb\u5145\u7535\u9636\u6bb5\u7684\u5145\u7535\u7535\u6d41\u5728ISEL\u7aef\u63a5\u9ad8\u7535\u5e73\u65f6(USB\u5f62\u5f0f)\uff0c\u7535\u6d41\u4e3a100mA\uff0c\u5728ISEL\u7aef\u63a5\u4f4e\u7535\u5e73\u65f6\uff0c\u7535\u6d41\u4e3a500mA\uff0c\u6b64\u523b\u82e5\u662f\u4f7f\u7528AC\u9002\u914d\u5668\u5145\u7535\uff0c\u5feb\u5145\u7535\u6d41\u7531\u7528\u6237\u8bbe\u5b9a(100-750mA)\u5feb\u5145\u7535\u7535\u6d41\u7cbe\u5ea6\u5728\u2264150mA\u65f6\u4e3a\u00b120mA\uff0c\u2265200mA\u4e3a\u00b110%\uff0c\u5feb\u5145\u7535\u7535\u538b\u52304.1V\u65f6\uff0c\u6052\u6d41\u5145\u7535\u9636\u6bb5\u7ed3\u675f\uff0c\u8f6c\u4e3a4.1V\u6052\u538b\u5145\u7535\u3002<\/span><\/p>\n\n\n\n

    \u6052\u538b\u5145\u7535\u9636\u6bb5\u5145\u7535\u7535\u538b\u4e0d\u53d8\uff0c\u4f46\u5145\u7535\u7535\u6d41\u4f1a\u9010\u6e10\u4e0b\u964d\uff0c\u76f4\u5230\u5145\u7535\u7535\u6d41\u4e0b\u964d\u5230\u5fc5\u5b9a\u7a0b\u5ea6\u65f6\uff0c\u5145\u7535\u7ed3\u675f\uff0c\u6b64\u523b\u7eff\u8272LED\u4eae\uff0c\u8d64\u8272LED\u7184\uff0c\u5047\u5982\u5feb\u5145\u7535\u7535\u6d41\u4e3a1C\u65f6\uff0c\u505c\u6b62\u5145\u7535\u7535\u6d41\u53ef\u8bbe\u5b9a\u4e3a0.1C\uff0c\u5219\u6052\u538b\u5145\u7535\u7535\u6d41\u4e0b\u964d\u523050mA\uff0c\u505c\u6b62\u5145\u7535\uff0c\u5728100mA\u5feb\u5145\u7535\u7535\u6d41\u65f6\uff0c\u5b9a\u65f6\u5668\u52305.6\u5c0f\u65f6\uff0c\u505c\u6b62\u5145\u7535\uff0c\u6b64\u523b\u4e24\u4e2aLED\u90fd\u4eae\u3002<\/span><\/p>\n\n\n\n

    \u5145\u7535\u7535\u6d41\u6709IC\u5185\u90e8\u7684\u7535\u6d41\u68c0\u6d4b\u7535\u8def\u68c0\u6d4b\uff0c\u6709Diff-Amp\u8f93\u51fa\u4e0e\u5145\u7535\u7535\u6d41\u6210\u4efd\u989d\u7684\u7535\u538b(\u8f93\u5165\u5fae\u5904\u7406\u5668\u7684ADC\u7535\u538b)\uff0c\u7ecf\u5fae\u5904\u7406\u5668\u64cd\u63a7\u540e\u8f93\u51fa\u505c\u6b62\u5145\u7535\u4fe1\u53f7\uff0c\u5145\u7535\u7535\u6d41ICHG\u4e0eDiff-Amp\u8f93\u51fa\u7535\u538b\u7684VDIFF\u7684\u5173\u7cfb\u4e3a\uff1a<\/span><\/p>\n\n\n\n

    ICHG=(VDIFF-0.497)\/1.655<\/span><\/p>\n\n\n\n

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