{"id":4987,"date":"2021-10-23T16:11:29","date_gmt":"2021-10-23T08:11:29","guid":{"rendered":"http:\/\/www.szryc.com\/?p=4987"},"modified":"2021-10-23T16:11:29","modified_gmt":"2021-10-23T08:11:29","slug":"%e5%a6%82%e4%bd%95%e5%81%9a%e5%88%b0%e7%94%a8%e9%93%9c%e7%ba%bf%e6%8e%a7%e5%88%b6%e8%bf%9c%e7%ab%af%e8%b4%9f%e8%bd%bd%e7%9a%84%e7%94%b5%e5%8e%8b","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=4987","title":{"rendered":"\u5982\u4f55\u505a\u5230\u7528\u94dc\u7ebf\u63a7\u5236\u8fdc\u7aef\u8d1f\u8f7d\u7684\u7535\u538b"},"content":{"rendered":"

\u5728\u529f\u7387\u5206\u914d\u7cfb\u7edf\u4e2d\uff0c\u7531\u4e8e\u7a33\u538b\u5668\u548c\u8d1f\u8f7d\u4e4b\u95f4\u7684\u7535\u7f06<\/u>\u00a0\/ \u5bfc\u7ebf\u538b\u964d\u800c\u4ea7\u751f\u7a33\u538b\u95ee\u9898\u662f\u5f88\u5e38\u89c1\u3002\u5bfc\u7ebf\u7535\u963b<\/u>\u3001\u7535\u7f06\u957f\u5ea6\u6216\u8d1f\u8f7d\u7535\u6d41<\/u>\u7684\u4efb\u4f55\u589e\u52a0\u90fd\u4f1a\u4f7f\u914d\u7535\u7ebf<\/u>\u4e0a\u7684\u538b\u964d\u589e\u5927\uff0c\u4ece\u800c\u6269\u5927\u8d1f\u8f7d\u4e0a\u7684\u5b9e\u9645\u7535\u538b\u4e0e\u7a33\u538b\u5668\u6240\u83b7\u7535\u538b\u4e4b\u95f4\u7684\u5dee\u5f02\u3002<\/p>\n

\u6539\u5584\u957f\u7535\u7f06\u7ebf\u8def\u4e0a\u7a33\u538b\u80fd\u529b\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u901a\u8fc7\u5728\u7a33\u538b\u5668\u548c\u8d1f\u8f7d\u4e4b\u95f4\u91c7\u7528\u56db\u7ebf\u5f0f\u5f00\u5c14\u6587 (Kelvin) \u8fde\u63a5\uff0c\u76f4\u63a5\u5730\u5728\u8d1f\u8f7d\u4e0a\u6d4b\u91cf\u7535\u538b\u3002\u4e0d\u5e78\u7684\u662f\uff0c\u8fd9\u79cd\u89e3\u51b3\u65b9\u6848\u9700\u8981\u989d\u5916\u5bfc\u7ebf\u5e03\u8bbe\u81f3\u8d1f\u8f7d\u4ee5\u53ca\u5728\u9760\u8fd1\u8d1f\u8f7d\u589e\u8bbe\u5f00\u5c14\u6587\u7535\u963b\u5668<\/u>\uff0c\u56e0\u6b64\u5f53\u65e0\u6cd5\u63a5\u8fd1\u8d1f\u8f7d\u8fdb\u884c\u76f8\u5e94\u7684\u53d8\u66f4\u65f6\uff0c\u5176\u5c31\u53d8\u5f97\u4e0d\u53ef\u884c\u3002\u53e6\u4e00\u79cd\u65b9\u6cd5\u5219\u662f\u91c7\u7528\u5927\u76f4\u5f84\u7684\u5bfc\u7ebf (\u4ece\u800c\u964d\u4f4e\u7a33\u538b\u5668\u5230\u8d1f\u8f7d\u4e4b\u95f4\u7684\u7535\u963b) \u4ee5\u8f83\u5927\u9650\u5ea6\u5730\u51cf\u5c0f\u7535\u538b\u964d\u3002\u8fd9\u79cd\u505a\u6cd5\u867d\u7136\u5728\u7535\u6c14\u65b9\u9762\u5341\u5206\u7b80\u5355\uff0c\u4f46\u662f\u4ece\u673a\u68b0\u7684\u89d2\u5ea6\u6765\u8bf4\u5374\u4f1a\u5f88\u590d\u6742\u3002\u589e\u5927\u7535\u7f06\u82af\u7ebf\u7684\u5c3a\u5bf8\u4f1a\u663e\u8457\u5730\u589e\u52a0\u7a7a\u95f4\u8981\u6c42\u548c\u6210\u672c\u3002<\/p>\n

\u53e6\u4e00\u79cd\u7528\u4e8e\u66ff\u4ee3\u589e\u8bbe\u9644\u52a0\u914d\u7ebf\u7684\u65b9\u6848\u662f\u5229\u7528 LT6110\u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u8865\u507f\u5668\uff0c\u4ee5\u5bf9\u7a33\u538b\u5668\u4e0a\u7684\u538b\u964d\u5b9e\u65bd\u8865\u507f\uff0c\u800c\u65e0\u9700\u5728\u7a33\u538b\u5668\u548c\u8d1f\u8f7d\u4e4b\u95f4\u6392\u5e03\u989d\u5916\u7684\u7535\u7f06 \/ \u914d\u7ebf\u3002\u672c\u6587\u5c06\u8bf4\u660e LT6110 \u600e\u6837\u5bf9\u591a\u79cd\u4e0d\u540c\u7684\u201c\u7a33\u538b\u5668\u81f3\u8d1f\u8f7d\u201d\u538b\u964d\u4f5c\u51fa\u8865\u507f\u4ee5\u6539\u5584\u7a33\u538b\u3002<\/p>\n

LT6110 \u7535\u7f06 \/ \u5bfc\u7ebf\u8865\u507f\u5668<\/p>\n

\u56fe 1 \u793a\u51fa\u4e86\u5355\u7ebf\u5f0f\u8865\u507f\u65b9\u6846\u56fe\u3002\u5982\u679c\u8fdc\u7aef\u8d1f\u8f7d\u7535\u8def<\/u>\u672a\u5171\u4eab\u7a33\u538b\u5668\u7684\u5730\uff0c\u5219\u9700\u8981\u4e24\u6839\u5bfc\u7ebf\uff0c\u4e00\u6839\u5bfc\u7ebf\u8fde\u63a5\u81f3\u8d1f\u8f7d\uff0c\u53e6\u4e00\u6839\u5219\u662f\u63a5\u5730\u56de\u7ebf\u3002LT6110 \u9ad8\u538b\u4fa7\u653e\u5927\u5668<\/u>\u901a\u8fc7\u6d4b\u91cf<\/u>\u68c0\u6d4b\u7535\u963b\u5668\u00a0RS<\/u>ENSE \u4e24\u7aef\u7684\u7535\u538b VSENSE \u6765\u68c0\u6d4b\u8d1f\u8f7d\u7535\u6d41\uff0c\u5e76\u8f93\u51fa\u4e00\u4e2a\u4e0e\u8d1f\u8f7d\u7535\u6d41 ILOAD<\/u>\u00a0\u6210\u6bd4\u4f8b\u7684\u7535\u6d41 IIOUT\u3002\u53ef\u5229\u7528 RIN \u7535\u963b\u8bbe\u7f6e IIOUT \u5728 10\u03bcA \u81f3 1mA \u4e4b\u95f4\u3002\u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d VDROP \u8865\u507f\u662f\u901a\u8fc7\u7ecf\u7531\u00a0RF<\/u>A \u53cd\u9988\u7535\u963b\u5668\u5438\u6536 IIOUT \u4ee5\u589e\u52a0\u7a33\u538b\u5668\u7684\u8f93\u51fa\u6765\u5b9e\u73b0\uff0c\u800c\u589e\u91cf\u5219\u7b49\u4e8e VDROP\u3002LT6110 \u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u8865\u507f\u8bbe\u8ba1\u5f88\u7b80\u5355\uff1a\u8bbe\u5b9a IIOUT \u2022 RFA \u7684\u4e58\u79ef\u7b49\u4e8e\u6700\u5927\u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u3002<\/p>\n

\"poYBAGFyIQCAB9sLAACRov0GiV4594\"<\/p>\n

\u56fe 1\uff1a\u65e0\u9700\u989d\u5916\u7684\u5bfc\u7ebf\u5373\u53ef\u8865\u507f\u81f3\u4e00\u4e2a\u8fdc\u7aef\u8d1f\u8f7d\u7684\u5bfc\u7ebf\u538b\u964d<\/p>\n

LT6110 \u5305\u62ec\u4e00\u4e2a\u5185\u90e8 20m\u03a9 RSENSE\uff0c\u9002\u5408\u9ad8\u81f3 3A \u7684\u8d1f\u8f7d\u7535\u6d41\uff1b\u5bf9\u4e8e\u5927\u4e8e 3A \u7684 ILOAD \u5219\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u5916\u90e8 RSENSE\u3002\u8be5\u5916\u90e8 RSENSE \u53ef\u4ee5\u662f\u4e00\u4e2a\u68c0\u6d4b\u7535\u963b\u3001\u4e00\u4e2a\u7535\u611f\u5668<\/u>\u7684 DC \u7535\u963b\u6216\u4e00\u4e2a\u00a0PCB<\/u>\u00a0\u8d70\u7ebf\u7535\u963b\u3002\u9664\u4e86 IIOUT \u5438\u6536\u7535\u6d41\u4e4b\u5916\uff0cLT6110 IMON \u5f15\u811a\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4f9b\u7535\u7535\u6d41 IMON\uff0c\u7528\u4ee5\u8865\u507f\u5982 LT3080\u7b49\u53c2\u8003\u4e8e\u7535\u6d41\u7684\u7ebf\u6027\u7a33\u538b\u5668<\/u>\u3002<\/p>\n

\u8865\u507f\u964d\u538b\u578b\u7a33\u538b\u5668\u7684\u7535\u7f06\u538b\u964d<\/p>\n

\u56fe 2 \u793a\u51fa\u4e86\u4e00\u4e2a\u5b8c\u6574\u7684\u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u8865\u507f\u7cfb\u7edf\uff0c\u8be5\u7cfb\u7edf\u7531\u4e00\u4e2a 3.3V\u30015A \u964d\u538b\u578b\u7a33\u538b\u5668\u548c\u4e00\u4e2a LT6110 \u7ec4\u6210\uff0c\u5176\u7528\u4e8e\u8c03\u8282\u4e00\u4e2a\u901a\u8fc7 20 \u82f1\u5c3a\u4e4b 18 AWG \u94dc\u7ebf\u8fde\u63a5\u7684\u8fdc\u7aef\u8d1f\u8f7d\u7535\u538b\u3002\u964d\u538b\u578b\u7a33\u538b\u5668\u7684 5A \u8f93\u51fa\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u5916\u90e8 RSENSE\u3002<\/p>\n

\"poYBAGFyIQCAeG56AAEQijU_QhY150\"<\/p>\n

\u56fe 2\uff1a\u9ad8\u7535\u6d41\u8fdc\u7aef\u8d1f\u8f7d\u8c03\u8282\u5b9e\u4f8b\uff1a\u4e00\u4e2a\u5177\u6709 LT6110 \u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u8865\u507f\u529f\u80fd\u7535\u8def\u7684 3.3V\u30015A \u964d\u538b\u578b\u7a33\u538b\u5668<\/p>\n

\u6d41\u8fc7 140m\u03a9 \u5bfc\u7ebf\u7535\u963b\u548c 25m\u03a9 RSENSE \u7684\u6700\u5927 5A ILOAD \u5c06\u4ea7\u751f\u4e00\u4e2a 825mV \u538b\u964d\u3002\u5bf9\u4e8e 0A \u2264 ILOAD \u2264 5A\uff0c\u5982\u8981\u8c03\u8282\u8d1f\u8f7d\u7535\u538b VLOAD\uff0c\u90a3\u4e48 IIOUT \u2022 RFA \u5fc5\u987b\u7b49\u4e8e 825mV\u3002\u8fd9\u6709\u4e24\u79cd\u8bbe\u8ba1\u9009\u9879\uff1a\u9009\u62e9 IIOUT \u5e76\u8ba1\u7b97 RFA \u7535\u963b\u5668\u963b\u503c\uff0c\u6216\u8005\u9488\u5bf9\u975e\u5e38\u4f4e\u7684\u7535\u6d41\u6765\u8bbe\u8ba1\u7a33\u538b\u5668\u7684\u53cd\u9988\u7535\u963b\u5e76\u8ba1\u7b97 RIN \u7535\u963b\u5668\u963b\u503c\u4ee5\u8bbe\u5b9a IIOUT\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0cIIOUT \u88ab\u8bbe\u5b9a\u4e3a 100\u03bcA (IIOUT \u8bef\u5dee\u5728 30\u03bcA \u81f3300\u03bcA \u8303\u56f4\u4e3a \u00b11%)\u3002\u5728\u56fe 2 \u6240\u793a\u7684\u7535\u8def\u4e2d\uff0c\u53cd\u9988\u901a\u8def\u7535\u6d41\u4e3a 6\u03bcA (VFB\/200k)\uff0cRFA \u7535\u963b\u4e3a 10k\uff0c\u800c\u4e14\u5fc5\u987b\u8ba1\u7b97 RIN \u7535\u963b\u5668\u7684\u963b\u503c\u4ee5\u8bbe\u5b9a IIOUT \u2022 RFA = 825mV\u3002<\/p>\n

\u5982\u679c\u6ca1\u6709\u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u8865\u507f\uff0c\u90a3\u4e48\u8d1f\u8f7d\u7535\u538b\u4e2d\u7684\u6700\u5927\u53d8\u5316\u91cf \u0394VLOAD \u53ef\u8fbe 700mV (5 \u2022 140m\u03a9)\uff0c\u4e5f\u5c31\u662f\u8bf4\uff1a\u5bf9\u4e8e\u4e00\u4e2a 3.3V \u8f93\u51fa\uff0c\u8bef\u5dee\u4e3a 21.2%\u3002LT6110 \u5728 25\u00b0C \u65f6\u53ef\u5c06 \u0394VLOAD \u51cf\u5c0f\u81f3\u4ec5\u4e3a 50mV\uff0c\u5373\u8bef\u5dee\u4e3a 1.5%\u3002\u8d1f\u8f7d\u8c03\u8282\u6027\u80fd\u7684\u6539\u5584\u5e45\u5ea6\u8fbe\u5230\u4e86\u4e00\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n

\u7cbe\u51c6\u8d1f\u8f7d\u8c03\u8282<\/p>\n

\u5229\u7528 LT6110 \u5b9e\u73b0\u8d1f\u8f7d\u8c03\u8282\u7684\u9002\u5ea6\u6539\u5584\u5e76\u4e0d\u9700\u8981\u8fdb\u884c\u51c6\u786e\u7684 RWIRE \u4f30\u7b97\u3002\u8d1f\u8f7d\u8c03\u8282\u8bef\u5dee\u662f\u4e24\u4e2a\u8bef\u5dee\u7684\u7ed3\u679c\uff1a\u7531\u4e8e\u7535\u7f06 \/ \u5bfc\u7ebf\u7535\u963b\u5f15\u8d77\u7684\u8bef\u5dee\u548c\u6e90\u81ea LT6110 \u8865\u507f\u7535\u8def\u7684\u8bef\u5dee\u3002\u4f8b\u5982\uff1a\u5f53\u91c7\u7528\u56fe 2 \u6240\u793a\u7535\u8def\u65f6\uff0c\u5373\u4f7f RSENSE \u548c RWIRE \u7684\u8ba1\u7b97\u8bef\u5dee\u4e3a 25%\uff0cLT6110 \u4ecd\u53ef\u5c06 VLOAD \u8bef\u5dee\u51cf\u5c0f\u81f3 6.25%\u3002<\/p>\n

\u5982\u6b32\u5b9e\u73b0\u7cbe\u51c6\u7684\u8d1f\u8f7d\u8c03\u8282\uff0c\u5219\u9700\u51c6\u786e\u5730\u4f30\u7b97\u7535\u6e90\u4e0e\u8d1f\u8f7d\u4e4b\u95f4\u7684\u7535\u963b\u3002\u5018\u82e5\u51c6\u786e\u5730\u4f30\u7b97\u4e86 RWIRE\u3001RSENSE \u4ee5\u53ca\u4e0e\u5bfc\u7ebf\u76f8\u4e32\u8054\u7684\u7535\u7f06\u82af\u7ebf\u548c PCB \u8d70\u7ebf\u7684\u7535\u963b\uff0c\u5219 LT6110 \u80fd\u591f\u5bf9\u591a\u79cd\u4e0d\u540c\u7684\u538b\u964d\u5b9e\u65bd\u9ad8\u7cbe\u5ea6\u8865\u507f\u3002<\/p>\n

\u5229\u7528 LT6110\u3001\u51c6\u786e\u7684 RWIRE \u4f30\u7b97\u548c\u7cbe\u51c6\u7684 RSENSE \u53ef\u51cf\u5c0f \u0394VLOAD \u8865\u507f\u8bef\u5dee\uff0c\u4ee5\u5728\u91c7\u7528\u4efb\u610f\u957f\u5ea6\u7684\u5bfc\u7ebf\u60c5\u51b5\u4e0b\u4e0e\u7a33\u538b\u5668\u7684\u7535\u538b\u8bef\u5dee\u76f8\u5339\u914d\u3002<\/p>\n

\u7ed3\u8bba<\/p>\n

LT6110 \u7535\u7f06 \/ \u5bfc\u7ebf\u538b\u964d\u8865\u507f\u5668\u53ef\u6539\u5584\u8fdc\u7aef\u8d1f\u8f7d\u7684\u7535\u538b\u8c03\u8282\uff0c\u5728\u8fd9\u91cc\uff0c\u5982\u679c\u672a\u5b9e\u65bd\u538b\u964d\u8865\u507f\uff0c\u5219\u9ad8\u7535\u6d41\u3001\u957f\u7535\u7f06\u7ebf\u8def\u548c\u7535\u963b\u5c06\u4f1a\u663e\u8457\u5730\u5f71\u54cd\u7a33\u538b\u80fd\u529b\u3002\u65e0\u9700\u589e\u8bbe\u68c0\u6d4b\u5bfc\u7ebf\u3001\u8d2d\u4e70\u5f00\u5c14\u6587\u7535\u963b\u5668\u3001\u4f7f\u7528\u66f4\u591a\u7684\u94dc\u6216\u90e8\u7f72\u8d1f\u8f7d\u70b9\u7a33\u538b\u5668 (\u8fd9\u4e9b\u90fd\u662f\u5176\u4ed6\u89e3\u51b3\u65b9\u6848\u7684\u5e38\u89c1\u7f3a\u9677) \u5373\u53ef\u5b9e\u73b0\u51c6\u786e\u7684\u8c03\u8282\u3002\u4e0e\u6b64\u76f8\u53cd\uff0c\u8865\u507f\u5668\u89e3\u51b3\u65b9\u6848\u4e0d\u4ec5\u6240\u9700\u7684\u7a7a\u95f4\u6781\u5c0f\uff0c\u540c\u65f6\u8fd8\u53ef\u8f83\u5927\u9650\u5ea6\u5730\u964d\u4f4e\u8bbe\u8ba1\u7684\u590d\u6742\u6027\u548c\u7ec4\u4ef6\u6210\u672c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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