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mA\u3002\u968f\u7740\u53d1\u5c04\u5668\u4e0a\u6dfb\u52a0\u66f4\u591a\u529f\u80fd\u548c\u7279\u6027\uff0c\u5f53\u4f7f\u7528\u4f20\u7edf\u7684\u7ebf\u6027\u7a33\u538b\u5668\u65f6\uff0c\u8fd9\u79cd\u9650\u5236\u6210\u4e3a\u4e00\u4e2a\u95ee\u9898\uff0c\u56e0\u4e3a\u4f20\u7edf\u7ebf\u6027\u7a33\u538b\u5668\u65e0\u6cd5\u63d0\u4f9b\u4efb\u4f55\u989d\u5916\u7684\u7535\u6d41\u3002\u6b64\u5916\uff0c\u4f7f\u7528\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7cfb\u7edf\u4e2d\u7684\u5927\u591a\u6570\u529f\u7387\u5fc5\u987b\u5728\u7a33\u538b\u5668\u672c\u8eab\u4e2d\u71c3\u70e7\uff0c\u4ece\u800c\u5728\u5c01\u88c5\u7cfb\u7edf\u4e2d\u4ea7\u751f\u5927\u91cf\u70ed\u91cf\u3002<\/p>\n<p>\u3000\u3000LT8618\u5c06\u8f93\u5165\u8303\u56f4\u6269\u5c55\u81f365 V\uff0c\u5e76\u5c06\u8d1f\u8f7d\u80fd\u529b\u6269\u5c55\u81f315 mA\u3002\u5176\u9ad8\u6548\u7387\u6d88\u9664\u4e86\u7535\u6d41\u73af\u8def\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\u7684\u70ed\u7ea6\u675f\uff0c\u5176\u4e2d\u53d8\u9001\u5668\u88ab\u5c01\u88c5\u5e76\u66b4\u9732\u5728\u6076\u52a3\u7684\u73af\u5883\u53d8\u5316\u4e2d\u3002\u5efa\u8bae\u91c7\u7528\u4f4e\u6210\u672c<u>\u6ee4\u6ce2\u5668<\/u>\u6765\u964d\u4f4e\u7535\u538b\u7eb9\u6ce2\u548c\u7535\u7f06\u4fa7\u7535\u6d41\u7eb9\u6ce2\u3002\u672c\u6587\u5206\u6790\u4e86\u529f\u7387\u8c03\u8282\u5668\u7684\u6027\u80fd\uff0c\u5e76\u63d0\u4f9b\u4e86\u6ee1\u8db3\u4e25\u683c\u5de5\u4e1a\u8981\u6c42\u7684\u5143\u4ef6\u9009\u62e9\u6307\u5357\u3002\u63d0\u4f9b\u6548\u7387\u3001\u542f\u52a8\u3001\u7eb9\u6ce2\u7b49\u6d4b\u8bd5\u6570\u636e\u3002<\/p>\n<p>\u3000\u3000\u4f7f\u7528\u5177\u6709\u6269\u5c55\u8f93\u5165\u548c\u8d1f\u8f7d\u8303\u56f4\u7684\u964d\u538b\u8f6c\u6362\u5668\u5173\u95ed\u7535\u6d41\u73af\u8def<\/p>\n<p>\u3000\u3000LT\u00ae8618 \u662f\u4e00\u6b3e\u7d27\u51d1\u578b\u964d\u538b\u578b\u8f6c\u6362\u5668\uff0c\u5177\u6709\u8bb8\u591a\u529f\u80fd\uff0c\u53ef\u6ee1\u8db3\u5de5\u4e1a\u3001\u6c7d\u8f66\u548c\u5176\u4ed6\u4e0d\u53ef\u9884\u6d4b\u7684\u7535\u6e90\u73af\u5883\u7684\u8981\u6c42\u3002\u5b83\u975e\u5e38\u9002\u54084 mA\u81f320 mA\u7535\u6d41\u73af\u8def\u5e94\u7528\uff0c\u5177\u6709\u8d85\u4f4e\u9759\u6001\u7535\u6d41\u3001\u9ad8\u6548\u7387\u3001\u5bbd\u8f93\u5165\u8303\u56f4\u3001\u9ad8\u8fbe65 V\u548c\u7d27\u51d1\u7684\u5c3a\u5bf8\u3002\u56fe2\u6240\u793a\u4e3a\u4f7f\u7528LT8618\u4e3aMAX6192C\u9ad8\u7cbe\u5ea6\u57fa\u51c6\u4f9b\u7535\u3001\u7535\u538b-\u7535\u6d41\u8f6c\u6362\u548c\u5176\u4ed6\u7535\u8def\u7684\u5b8c\u6574\u53d1\u9001\u5668\u7535\u8def\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<p>\u3000\u3000\u5206\u6d41\u7535\u8def2SC1623\u5904\u7684\u7535\u6d41\u4e0e\u65bd\u52a0\u5728\u8bef\u5dee<u>\u653e\u5927\u5668<\/u>\uff08EA\uff09\u6b63\u8f93\u5165\u7aef\u7684\u7535\u538b\u6210\u6b63\u6bd4\u30022.5 V\u57fa\u51c6\u7535\u538b\u7531MAX6192C\u4ea7\u751f\uff0cMAX6192C\u662f\u4e00\u6b3e\u7cbe\u5bc6\u57fa\u51c6IC\uff0c\u5177\u6709\u4f4e\u566a\u58f0\u3001\u4f4e\u538b\u5dee\u548c5 ppm\/\u00b0C\uff08\u6700\u5927\u503c\uff09\u7684\u4f4e\u6e29\u6f02\u79fb\u3002\u5bf9\u4e8e\u5177\u6709\u4e0e\u73af\u5883\u53d8\u91cf\u6210\u6bd4\u4f8b\u7684\u6570\u5b57\u8f93\u51fa\u7684\u667a\u80fd\u4f20\u611f\u5668\uff0cDAC\u53ef\u4ee5\u5c06\u6570\u5b57\u4fe1\u53f7\u8f6c\u6362\u4e3a\u6a21\u62df\u4fe1\u53f7\uff0c\u5e76\u5c06\u5176\u9988\u9001\u5230\u8bef\u5dee\u653e\u5927\u5668\u3002<\/p>\n<p>\u3000\u3000\uff3bI_{SHUNT}=frac{\uff08V_{<u>DC<\/u>1}+V_{REF}\uff09R_{12}}{R_{11}R_{SENSE}}\uff0c\uff0c\uff0c\uff081\uff09\uff3d<\/p>\n<p>\u3000\u3000\u56e0\u6b64\uff0c\u4f7f\u7528EA\u3001BJT\uff082SC1623\uff09\u548c100 \u03a9\uff08\u00b10.1%\uff09<u>\u68c0\u6d4b<\/u>\u7535\u963b\uff08<u>RS<\/u>ENSE\uff09\uff0c\u4f20\u611f\u5668\u5c06\u7535\u6d41\u73af\u8def\u4e2d\u7684\u7535\u6d41\u4ece4 mA\u8c03\u5236\u523020 mA\uff0c\u5176\u4e2d4 mA\u8868\u793a\u5e26\u7535\u96f6\u70b9\uff0c20 mA\u8868\u793a\u6700\u5927\u4fe1\u53f7\u30024 mA\u7684\u5e26\u7535\u6216\u9ad8\u96f6\u70b9\u5141\u8bb8\u8bbe\u5907\u4f9b\u7535\uff0c\u5373\u4f7f\u73b0\u573a\u53d8\u9001\u5668\u6ca1\u6709\u8fc7\u7a0b\u4fe1\u53f7\u8f93\u51fa\u3002\u56e0\u6b64\uff0c\u5206\u6d41\u7535\u8def\u4e2d\u7684\u7535\u6d41\u4e0e\u73af\u5883\u53d8\u91cf\u6210\u6b63\u6bd4\uff0c\u4f8b\u5982\u538b\u529b\u3001\u6e29\u5ea6\u3001\u6db2\u4f4d\u3001\u6d41\u91cf\u3001\u6e7f\u5ea6\u3001\u8f90\u5c04\u3001pH \u6216\u5176\u4ed6\u8fc7\u7a0b\u53d8\u91cf\u3002<\/p>\n<p>\u3000\u3000\u4e24\u6839\u957f\u7ebf\u662f\u4fe1\u606f\u627f\u8f7d\u7535\u6d41\u73af\u8def\u7684\u4e00\u90e8\u5206\uff0c\u4e5f\u7528\u4e8e\u4eceV\u5411\u53d8\u9001\u5668\u4f9b\u7535\u76f4\u6d41\uff0c\u5219\u63a5\u6536\u5668\u4fa7\u7684\u7535\u6e90\u3002V\u7684\u6700\u5c0f\u7535\u538b\u76f4\u6d41\u5e94\u8db3\u4ee5\u8986\u76d6\u5bfc\u7ebf\u3001\u5206\u6d41\u5668\u4e24\u7aef\u7684\u538b\u964d\u548c\u53d8\u9001\u5668\u7684\u6700\u5c0f\u5de5\u4f5c\u7535\u538b\u3002\u6e90\u7535\u538b\u53d6\u51b3\u4e8e\u5e94\u7528\uff0c\u901a\u5e38\u4e3a12 V\u621624 V\uff0c\u4f46\u6700\u9ad8\u53ef\u8fbe36 V\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"post-image\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10375\" title=\"poYBAGNOdyeANKbjAAC-orDbmvo900\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyeANKbjAAC-orDbmvo900.jpg\" alt=\"poYBAGNOdyeANKbjAAC-orDbmvo900\" width=\"720\" height=\"296\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyeANKbjAAC-orDbmvo900.jpg 720w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyeANKbjAAC-orDbmvo900-300x123.jpg 300w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/div>\n<p>\u3000\u3000\u56fe 2. \u4ee5LT8618\u4f5c\u4e3a\u76f4\u6d41\u7535\u6e90\u7684\u7535\u6d41\u73af\u8def\u3002\u56fe\u7247\u7531\u535a\u591a\u7684\u7535\u529b\u7cfb\u7edf\u63d0\u4f9b \uff3bPDF\uff3d<\/p>\n<p>\u3000\u3000\u5728\u8fdc\u7a0b\u53d1\u5c04\u5668\u7aef\u5b50\u4e0a\uff0c\u8096\u7279\u57fa<u>\u4e8c\u6781\u7ba1<\/u>\uff08D1\uff09\u4fdd\u62a4\u53d1\u5c04\u5668\u514d\u53d7\u53cd\u5411\u7535\u6d41\u7684\u5f71\u54cd\u3002\u8fdb\u4e00\u6b65\u7684\u4fdd\u62a4\u7531\u653e\u7f6e\u5728\u8f93\u5165\u7aef\u7684\u9f50\u7eb3\u6216TVS \uff08D2\uff09\u4e8c\u6781\u7ba1\u63d0\u4f9b\uff0c\u4ee5\u9650\u5236\u77ac\u6001\u7535\u538b\u6d6a\u6d8c\uff0c\u77ac\u6001\u7535\u538b\u6d6a\u6d8c\u4e0e\u7535\u6d41\u73af\u8def\u7684\u7535\u611f\u6210\u6b63\u6bd4\u3002\u73af\u8def\u7535\u538b\u7531 LT8618 \u9ad8\u6548\u5355\u7247\u964d\u538b\u7a33\u538b\u5668\u964d\u538b\u81f3 5.5 V \u6216 3.3 V\uff0c\u4e3a\u57fa\u51c6\u7535\u538b\u6e90\u3001DAC \u548c\u5176\u4ed6\u529f\u80fd\u6a21\u5757\u4f9b\u7535\u3002<\/p>\n<p>\u3000\u3000\u5728\u56fe2\u4e2d\uff0cV\u4e4b\u95f4\u7684\u5bfc\u7ebf\u76f4\u6d41\u53d1\u5c04\u5668\u7684\u8303\u56f4\u53ef\u4ee5\u4ece\u51e0\u82f1\u5c3a\u52302000\u82f1\u5c3a\u3002\u7535\u6d41\u73af\u8def\u7684\u6742\u6563\u7535\u611f\u4e0e\u964d\u538b\u7a33\u538b\u5668\u7684\u8f93\u5165<u>\u7535\u5bb9<\/u>\u5f62\u6210LC\u8c10\u632f\u69fd\u3002\u7535\u6e90\u4fa7\u7684\u77ac\u53d8 \uff08V\u76f4\u6d41\uff09 \u4e5f\u51fa\u73b0\u5728\u8fdc\u7a0b\u53d1\u5c04\u5668\u7684\u8f93\u5165\u7aef\u3002\u5bf9\u4e8e\u6700\u574f\u60c5\u51b5\u4e0b\u7684\u65e0\u963b\u5c3c\u632f\u8361\uff0c\u5cf0\u503c\u7535\u538b\u53ef\u4ee5\u4f7fVDC\u7684\u5cf0\u503c\u7535\u538b\u589e\u52a0\u4e00\u500d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5de5\u4f5c\u8f93\u5165\u7535\u538b\u4e3a24 V\uff0c\u6700\u5927\u89c4\u683c\u4e3a36 V\uff0c\u5219\u53d1\u5c04\u5668\u4fa7\u7684\u6700\u5927\u7535\u538b\u6709\u8d85\u8fc765 V\u7684\u98ce\u9669\u3002<\/p>\n<p>\u3000\u3000\u6216\u8005\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5229\u7528 LDO \u7a33\u538b\u5668\u4fdd\u62a4 LT8618 \u514d\u53d7\u9ad8\u7535\u538b\u504f\u79fb\u7684\u5f71\u54cd\u6765\u6784\u5efa\u9ad8\u6548\u7684\u7cfb\u7edf\u3002\u5728\u8fd9\u79cd\u62d3\u6251\u7ed3\u6784\u4e2d\uff0cLDO\u7a33\u538b\u5668\u5c06\u8c03\u8282\u5230\u8f93\u5165\u51cf\u53bb\u5176\u538b\u5dee\u7535\u538b\uff0cLT8618\u4ee5\u9ad8\u6548\u7387\u5c06~24 V\u8f6c\u6362\u4e3a5 V\u62163.3 V\u3002LDO\u7a33\u538b\u5668\u7684\u7535\u6d41\u9650\u503c\u5e94\u8bbe\u7f6e\u4e3a\u4f4e\u4e8e\u5178\u578b\u76843.8 mA\uff0c\u540c\u65f6\u4fdd\u6301\u9ad8\u6548\u7387\uff0cLT8618\u7684\u8f93\u5165<u>\u7535\u5bb9\u5668<\/u>\u57fa\u672c\u4e0a\u4e5f\u53ef\u7528\u4f5c\u53bb\u8026\u548c\u50a8\u80fd\u7535\u5bb9\u5668\u3002\u8fd9\u5c06\u5728\u4e0b\u6e38\u5b9e\u73b0\u77ed\u65f6\u95f4\u7684\u9ad8\u8d1f\u8f7d\u7a81\u53d1\uff0c\u7535\u6d41\u73af\u8def\u4e2d\u7684\u7535\u6d41\u6d88\u8017\u6700\u5c0f\u6216\u6ca1\u6709\u7535\u6d41\u6d88\u8017\u3002\u7531\u4e8e\u9ad8\u538b\u504f\u79fb\u5f88\u77ed\uff0c\u901a\u5e38\u627f\u8f7d\u7684\u603b\u80fd\u91cf\u5f88\u5c11\uff0c\u56e0\u6b64\u5728\u8fd9\u4e9b\u77ac\u53d8\u671f\u95f4\uff0cLDO\u7a33\u538b\u5668\u4e2d\u4ea7\u751f\u7684\u529f\u7387\u635f\u8017\u4e0d\u4f1a\u5f71\u54cd\u6574\u4f53\u6548\u7387\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cLDO\u7a33\u538b\u5668\u51e0\u4e4e\u6240\u6709\u65f6\u95f4\u90fd\u5904\u4e8e\u9ad8\u964d\u538b\u6bd4\u3002<\/p>\n<p>\u3000\u3000\u5178\u578b\u7684\u7535\u6d41\u73af\u8def\u9650\u5236\u4e3a\u6574\u4e2a\u8fdc\u7a0b\u53d1\u5c04\u5668\u4f9b\u7535\u7684\u7535\u6e90\u7535\u8def\u7684\u8f93\u5165\u7535\u6d41\uff0c\u6765\u81eaLDO\u7a33\u538b\u5668\u7684\u53ef\u7528\u8d1f\u8f7d\u7535\u6d41\u4e0d\u80fd\u8d85\u8fc7\u6b64\u8f93\u5165\u7535\u6d41\u9650\u5236\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u964d\u538b\u7a33\u538b\u5668\u53ef\u4ee5\u4e58\u4ee5\u63d0\u4f9b\u7ed9\u8d1f\u8f7d\u7684\u8f93\u5165\u7535\u6d41\u3002\u56fe3\u663e\u793a\u4e86LT8618\u7a33\u538b\u5668\u7684\u8f93\u51fa\u7535\u6d41\u4e0e\u8f93\u5165\u7535\u6d41\u7684\u5173\u7cfb\uff0c\u7528\u4e8e24 V\u8f93\u5165\u81f35.5 V\u8f6c\u6362\u3002\u5bf9\u4e8e3.8 mA\u7684\u8f93\u5165\u7535\u6d41\u9650\u5236\uff0c\u8f93\u51fa\u7535\u6d41\u51e0\u4e4e\u4e3a15 mA\u3002\u8fd9\u79cd\u989d\u5916\u7684\u529f\u7387\u901a\u8fc7\u589e\u52a0\u64cd\u4f5c\u4f59\u91cf\u548c\u542f\u7528\u989d\u5916\u7684\u529f\u80fd\u5757\u6765\u7b80\u5316\u7cfb\u7edf\u8bbe\u8ba1\u4eba\u5458\u7684\u5de5\u4f5c\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"post-image\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10376\" title=\"pYYBAGNOdyiAC8pLAABjU2aKsuQ065\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/pYYBAGNOdyiAC8pLAABjU2aKsuQ065.jpg\" alt=\"pYYBAGNOdyiAC8pLAABjU2aKsuQ065\" width=\"509\" height=\"400\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/pYYBAGNOdyiAC8pLAABjU2aKsuQ065.jpg 509w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/pYYBAGNOdyiAC8pLAABjU2aKsuQ065-300x236.jpg 300w\" sizes=\"(max-width: 509px) 100vw, 509px\" \/><\/div>\n<p>\u3000\u3000\u56fe 3.\u8f93\u51fa\u7535\u6d41\u4e0e\u8f93\u5165\u7535\u6d41\u7684\u5173\u7cfb\uff0cV\u5728= 24 V\uff0c V\u5916= 5.5 V. \u56fe\u7247\u7531Bodo\u7684\u7535\u529b\u7cfb\u7edf\u63d0\u4f9b \uff3bPDF\uff3d<\/p>\n<p>\u3000\u3000\u7a81\u53d1\u6a21\u5f0f\u64cd\u4f5c\u63d0\u9ad8\u4e86\u5728\u7ea4\u5de7\u8d1f\u8f7d\u6761\u4ef6\u4e0b\u7684\u6548\u7387<\/p>\n<p>\u3000\u3000LDO\u7a33\u538b\u5668\u7684\u6548\u7387\u4e0e\u964d\u538b\u6bd4\uff08V\u5916\/\u4e94\u5728\uff09\uff0c\u5f53\u8f93\u5165\u7535\u538b\u7565\u9ad8\u4e8e\u8f93\u51fa\u65f6\uff0c\u53ef\u4ee5\u6709\u6548\u3002\u5728\u6548\u7387\u975e\u5e38\u4f4e\u7684\u9ad8\u964d\u538b\u6bd4\u4e0b\uff0c\u95ee\u9898\u5c31\u51fa\u73b0\u4e86\uff0c\u4ece\u800c\u5bf9\u7cfb\u7edf\u4ea7\u751f\u663e\u8457\u7684\u70ed\u5e94\u529b\u3002\u4f8b\u5982\uff0c\u8f93\u5165\u4e3a55 V\uff0c\u8f93\u51fa\u4e3a3.3 V\u65f6\uff0cLDO\u7a33\u538b\u5668\u7684\u529f\u7387\u635f\u8017\u4e3a0.19 W\uff0c\u8d1f\u8f7d\u7535\u6d41\u4e3a3.8 mA\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u8bbe\u8ba1\u5408\u7406\u7684\u964d\u538b\u7a33\u538b\u5668\u5728\u9ad8\u964d\u538b\u6bd4\u4e0b\u53ef\u4ee5\u975e\u5e38\u9ad8\u6548\u3002\u6b64\u5916\uff0c\u540c\u6b65\u964d\u538b\u578b\u7a33\u538b\u5668\u53ef\u901a\u8fc7\u7528\u00a0<u>MOSFET<\/u>\u00a0\u53d6\u4ee3\u7b06\u79be\u4e8c\u6781\u7ba1\u6765\u63d0\u9ad8\u6548\u7387\u3002\u540c\u6b65\u964d\u538b\u8f6c\u6362\u5668\u7684\u6311\u6218\u662f\u4f18\u5316\u6574\u4e2a\u8d1f\u8f7d\u8303\u56f4\u5185\u7684\u6548\u7387\uff0c\u7279\u522b\u662f\u57283 mA\u81f315 mA\u7684\u8f7b\u8d1f\u8f7d\u4e0b\uff0c\u5f53\u8f93\u5165\u53ef\u9ad8\u8fbe65 V\u65f6\u3002<\/p>\n<p>\u3000\u3000\u5bf9\u4e8e\u5178\u578b\u7684\u540c\u6b65\u964d\u538b\u8f6c\u6362\u5668\uff0c\u4e09\u79cd\u529f\u7387\u635f\u8017\u5360\u4e3b\u5bfc\u5730\u4f4d\uff1a\u5f00\u5173\u635f\u8017\u3001\u6805\u6781\u9a71\u52a8\u635f\u8017\u4ee5\u53ca\u4e0e\u8f6c\u6362\u5668IC\u63a7\u5236\u5668\u903b\u8f91\u7535\u8def\u76f8\u5173\u7684\u635f\u8017\u3002\u5982\u679c\u5f00\u5173\u9891\u7387\u964d\u4f4e\uff0c\u5f00\u5173\u548c\u6805\u6781\u9a71\u52a8\u635f\u8017\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\uff0c\u56e0\u6b64\u53ea\u9700\u4ee5\u4f4e\u9891\u8fd0\u884c\u8f6c\u6362\u5668\uff0c\u5373\u53ef\u964d\u4f4e\u8f7b\u8d1f\u8f7d\u65f6\u7684\u5f00\u5173\u635f\u8017\u548c\u6805\u6781\u635f\u8017\u3002<\/p>\n<p>\u3000\u3000\u5728\u8f7b\u8d1f\u8f7d\u65f6\uff0c\u903b\u8f91\u7535\u8def\u7684\u504f\u7f6e\u635f\u8017\u4e0e\u76f8\u5bf9\u8f83\u4f4e\u7684\u5f00\u5173\u76f8\u5173\u635f\u8017\u76f8\u5f53\u3002\u504f\u7f6e\u7535\u8def\u901a\u5e38\u7531\u8f93\u51fa\u4f9b\u7535\uff0c\u4ec5\u5728\u542f\u52a8\u548c\u5176\u4ed6\u77ac\u6001\u6761\u4ef6\u4e0b\u901a\u8fc7\u5185\u90e8LDO\u7a33\u538b\u5668\u4ece\u8f93\u5165\u83b7\u53d6\u529f\u7387\u3002<\/p>\n<p>\u3000\u3000\u5728\u8f7b\u8d1f\u8f7d\u6761\u4ef6\u4e0b\uff0cLT8618 \u901a\u8fc7\u5728\u7a81\u53d1\u6a21\u5f0f\u4e0b\u00ae\u5de5\u4f5c\u6765\u89e3\u51b3\u903b\u8f91\u7535\u8def\u635f\u8017\u95ee\u9898\uff0c\u5176\u4e2d\u7535\u6d41\u4ee5\u77ed\u8109\u51b2\u5f62\u5f0f\u4f20\u9012\u5230\u8f93\u51fa\u7535\u5bb9\u5668\uff0c\u7136\u540e\u662f\u76f8\u5bf9\u8f83\u957f\u7684\u4f11\u7720\u5468\u671f\uff0c\u5176\u4e2d\u5927\u591a\u6570\u903b\u8f91\u63a7\u5236\u7535\u8def\u88ab\u5173\u65ad\u3002<\/p>\n<p>\u3000\u3000\u4e3a\u4e86\u8fdb\u4e00\u6b65\u63d0\u9ad8\u8f7b\u8d1f\u8f7d\u65f6\u7684\u6548\u7387\uff0c\u6700\u597d\u4f7f\u7528\u66f4\u5927\u503c\u7684<u>\u7535\u611f\u5668<\/u>\uff0c\u56e0\u4e3a\u5728\u77ed\u5f00\u5173\u8109\u51b2\u671f\u95f4\uff0c\u53ef\u4ee5\u5411\u8f93\u51fa\u63d0\u4f9b\u66f4\u591a\u7684\u80fd\u91cf\uff0c\u5e76\u4e14\u964d\u538b\u7a33\u538b\u5668\u53ef\u4ee5\u5728\u8fd9\u4e9b\u8109\u51b2\u4e4b\u95f4\u4fdd\u6301\u66f4\u957f\u65f6\u95f4\u7684\u4f11\u7720\u6a21\u5f0f\u3002\u901a\u8fc7\u6700\u5927\u9650\u5ea6\u5730\u5ef6\u957f\u8109\u51b2\u4e4b\u95f4\u7684\u65f6\u95f4\u5e76\u6700\u5c0f\u5316\u6bcf\u4e2a\u77ed\u8109\u51b2\u7684\u5f00\u5173\u635f\u8017\uff0cLT8618\u7684\u9759\u6001\u7535\u6d41\u53ef\u4ee5\u5c0f\u4e8e2.5 \u03bcA\uff0c\u540c\u65f6\u5728\u9ad8\u8fbe60 V\u7684\u8f93\u5165\u4e0b\u4fdd\u6301\u8f93\u51fa\u8c03\u8282\u3002\u7531\u4e8e\u8bb8\u591a\u53d1\u9001\u5668\u7535\u8def\u5927\u90e8\u5206\u65f6\u95f4\u90fd\u6d88\u8017\u4f4e\u7535\u6d41\uff0c\u56e0\u6b64\u4e0e\u5178\u578b\u7684\u964d\u538b\uff08\u529f\u8017\u4e3a\u6570\u5341\u6216\u6570\u767e\u03bcA\uff09\u76f8\u6bd4\uff0c\u8fd9\u79cd\u4f4e\u9759\u6001\u7535\u6d41\u53ef\u663e\u7740\u8282\u7701\u80fd\u6e90\u3002<\/p>\n<p>\u3000\u3000\u56fe4\u663e\u793a\u4e86\u56fe2\u6240\u793a\u7535\u6d41\u73af\u8def\u89e3\u51b3\u65b9\u6848\u7684\u6548\u7387\uff0c\u5176\u4e2d5.5 VOUT\u8f93\u51fa\u8f68\u8fde\u63a5\u5230LT8618\u7684BIAS\u5f15\u811a\u3002\u5728100 mA\u6ee1\u8f7d\u65f6\uff0c\u5cf0\u503c\u6548\u7387\u8fbe\u523087%\uff0c\u8f93\u5165\u4e3a28 V\uff0c\u7535\u611f\u4e3a82 \u03bcH\u3002\u5bf9\u4e8e\u76f8\u540c\u768428 V\u8f93\u5165\uff0c10 mA\u8d1f\u8f7d\u6548\u7387\u7b49\u4e8e\u6216\u9ad8\u4e8e77%\uff0c\u53ef\u4ee5\u8bf4\u66f4\u4ee4\u4eba\u5370\u8c61\u6df1\u523b\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"post-image\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10377\" title=\"poYBAGNOdyiAGSDLAABJCiGSfP8830\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyiAGSDLAABJCiGSfP8830.jpg\" alt=\"poYBAGNOdyiAGSDLAABJCiGSfP8830\" width=\"475\" height=\"400\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyiAGSDLAABJCiGSfP8830.jpg 475w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyiAGSDLAABJCiGSfP8830-300x253.jpg 300w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/><\/div>\n<p>\u3000\u3000\u56fe 4.LT8618 \u5728\u8f7b\u8d1f\u8f7d\u3001V \u6761\u4ef6\u4e0b\u7684\u9ad8\u6548\u7387\u5728= 28 V\uff0c V\u5916= 5.5 V\uff0c L = 82 \u03bcH. \u4f7f\u7528\u7684\u56fe\u50cf\u7531Bodo\u7684\u7535\u529b\u7cfb\u7edf\u63d0\u4f9b \uff3bPDF\uff3d<\/p>\n<p>\u3000\u3000\u8f93\u5165\u6ee4\u6ce2\u5668\u53ef\u9650\u5236\u6d6a\u6d8c\u7535\u6d41\u548c\u7535\u6d41\u73af\u8def\u7eb9\u6ce2<\/p>\n<p>\u3000\u3000\u529f\u7387\u8c03\u8282\u5668\u7684\u8f93\u5165\u8fde\u63a5\u5230\u7535\u6d41\u73af\u8def\uff0c\u56e0\u6b64\u9664\u4e86\u7a33\u6001\u7535\u6d41\u9650\u5236\u5916\uff0c\u5728\u542f\u52a8\u6216\u8d1f\u8f7d\u77ac\u53d8\u671f\u95f4\u9650\u5236\u7eb9\u6ce2\u7535\u6d41\u548c\u6d6a\u6d8c\u7535\u6d41\u4e5f\u5f88\u91cd\u8981\u3002\u7535\u6e90\u8f6c\u6362\u5668\u542f\u52a8\u671f\u95f4\u7684\u6d6a\u6d8c\u7535\u6d41\u53d6\u51b3\u4e8e\u7ed9\u5b9a\u8f6f\u542f\u52a8\u65f6\u95f4\u5185\u8f93\u5165\u548c\u8f93\u51fa\u7535\u5bb9\u5668\u7684\u5927\u5c0f\u3002\u8fd9\u5c31\u662f\u6743\u8861\uff1a\u6700\u5c0f\u5316\u8f93\u5165\u7535\u5bb9\u4ee5\u9632\u6b62\u5927\u6d6a\u6d8c\u7535\u6d41\uff0c\u540c\u65f6\u4f7f\u5176\u8db3\u591f\u5927\u4ee5\u4fdd\u6301\u53ef\u63a5\u53d7\u7684\u4f4e\u7eb9\u6ce2\u3002<\/p>\n<p>\u3000\u3000\u964d\u538b\u8f6c\u6362\u5668\u7684\u8f93\u5165\u7535\u6d41\u662f\u8109\u51b2\u7684;\u56e0\u6b64\uff0c\u8f93\u5165\u7535\u5bb9\u5728\u4e3a\u7eb9\u6ce2\u7535\u6d41\u63d0\u4f9b\u6ee4\u6ce2\u8def\u5f84\u65b9\u9762\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002\u5982\u679c\u6ca1\u6709\u8be5\u7535\u5bb9\uff0c\u5927\u91cf\u7684\u7eb9\u6ce2\u7535\u6d41\u5c06\u6d41\u8fc7\u957f\u7535\u6d41\u73af\u8def\uff0c\u5bfc\u81f4\u964d\u538b\u8868\u73b0\u4e0d\u53ef\u9884\u6d4b\u3002\u56e0\u6b64\uff0c\u6700\u5c0f\u8f93\u5165\u7535\u5bb9\u6ee1\u8db3\u7eb9\u6ce2\u7535\u6d41\u548c\u7eb9\u6ce2\u7535\u538b\u8981\u6c42\u3002\u591a\u5c42\u9676\u74f7\u7535\u5bb9\u5668\uff08MLCC\uff09\u7531\u4e8e\u5176\u4f4eESR\u548cESL\uff0c\u5728\u7eb9\u6ce2\u7535\u6d41\u65b9\u9762\u5177\u6709\u6700\u4f73\u6027\u80fd\u3002<\/p>\n<p>\u3000\u3000\u5f53\u8f6c\u6362\u5668\u5728\u7a81\u53d1\u6a21\u5f0f\u4e0b\u5de5\u4f5c\u65f6\uff0c\u7535\u611f\u7535\u6d41\u9075\u5faa\u4e00\u4e2a\u4e09\u89d2\u5f62\u6ce2\u5f62\u3002\u7535\u6d41\u73af\u8def\u7684\u963b\u6297\u8fdc\u9ad8\u4e8e\u8f93\u5165\u6ee4\u6ce2\u5668\u3002\u56e0\u6b64\uff0c\u8f93\u5165\u7535\u5bb9\u5668\u4e24\u7aef\u7684\u7eb9\u6ce2\u7535\u538b\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u4f30\u8ba1\uff0c\u5ffd\u7565\u7535\u5bb9\u5668\u7684ESR\u548cESL\uff0c\u5176\u4e2dIPEAK\u662f\u964d\u538b\u7535\u611f\u4e2d\u7684\u7a81\u53d1\u7535\u6d41\uff0cVR\u662f\u8f93\u5165\u7535\u5bb9\u5668\u4e24\u7aef\u7684\u7eb9\u6ce2\u7535\u538b\uff08\u663e\u7136\uff0c\u66f4\u9ad8\u7684\u7a81\u53d1\u7535\u6d41\u9700\u8981\u66f4\u5927\u7684\u7535\u5bb9\uff09\uff1a<\/p>\n<p>\u3000\u3000\uff3bC=frac{I^{2}_{PEAK}L}{2V_{R}V_{IN}}\uff0c\uff0c\uff0c\uff082\uff09\uff3d<\/p>\n<p>\u3000\u3000\u4e3a\u4e86\u6700\u5927\u9650\u5ea6\u5730\u964d\u4f4e\u8f93\u5165\u7535\u538b\u7eb9\u6ce2\uff0c\u540c\u65f6\u4fdd\u6301\u8f93\u5165\u7535\u5bb9\u5c3d\u53ef\u80fd\u5c0f\uff0c\u6211\u4eec\u66f4\u559c\u6b22\u8f83\u5c0f\u7684\u964d\u538b\u7535\u611f\u3002\u7136\u800c\uff0c\u4f7f\u7528\u5927\u7535\u611f\u5668\u65f6\uff0c\u7a81\u53d1\u6a21\u5f0f\u6548\u7387\u66f4\u597d\u3002\u5bf9\u4e8e82 \u03bcH\u7535\u611f\u548c1 V\u7eb9\u6ce2\uff0c\u4e3a\u907f\u514d\u5728\u4efb\u4f55\u6700\u5c0f\u8f93\u5165\u5b9e\u4f8b\u4e0b\u89e6\u53d1UVLO\uff0c100 nF\u8f93\u5165\u7535\u5bb9\u8db3\u4ee5\u6ee1\u8db3\u4f7f\u7528LT8618\u7684\u6b64\u5e94\u7528\u3002<\/p>\n<p>\u3000\u3000\u5927\u90e8\u5206\u7eb9\u6ce2\u7535\u6d41\u901a\u8fc7\u5c40\u90e8\u53bb\u8026\u7535\u5bb9\uff0c\u5269\u4f59\u90e8\u5206\u4e0e\u7535\u6d41\u73af\u8def\u5171\u4eab\u76f8\u540c\u7684\u8def\u5f84\u3002\u4fdd\u6301\u7535\u7f06\u4fa7\u7684\u7535\u6d41\u7eb9\u6ce2\u8f83\u5c0f\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u5c06\u4f5c\u4e3a\u7535\u538b\u7eb9\u6ce2\u51fa\u73b0\u5728\u5206\u6d41\u68c0\u6d4b\u7535\u963b\u7684\u4e24\u7aef\uff0c\u5e76\u4e14\u7535\u538b\u7eb9\u6ce2\u7684\u5927\u5c0f\u9700\u8981\u5c0f\u4e8e\u8bfb\u53d6\u5206\u6d41\u68c0\u6d4b\u7535\u963b\u4e24\u7aef\u7535\u538b\u7684<u>ADC<\/u>\u7684\u5206\u8fa8\u7387\u89c4\u683c\u3002\u7535\u6d41\u7eb9\u6ce2\u53ef\u4ee5\u901a\u8fc7\u989d\u5916\u7684\u6ee4\u6ce2\u5668\u8fdb\u4e00\u6b65\u964d\u4f4e\u3002RC\u6ee4\u6ce2\u5668\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u8bbe\u8ba1\u6743\u8861\uff0c\u56e0\u4e3a\u8f93\u5165\u7535\u6d41\u5f88\u5c0f\uff0c\u800c\u4e14\u4e0eLC\u6ee4\u6ce2\u5668\u76f8\u6bd4\u6210\u672c\u8f83\u4f4e\u3002\u901a\u8fc7\u4e24\u7ea7\u6216\u4e09\u7ea7\u8054\u7684RC\u6ee4\u6ce2\u5668\u53ef\u4ee5\u8fdb\u4e00\u6b65\u5b9e\u73b0\u66f4\u5c0f\u7684\u7eb9\u6ce2\u7535\u6d41\u3002<\/p>\n<p>\u3000\u3000LTs<u>pi<\/u>ce\u00ae<u>\u4eff\u771f<\/u>\u5141\u8bb8\u6211\u4eec\u6bd4\u8f83\u4e09\u79cd\u4e0d\u540c\u8f93\u5165\u6ee4\u6ce2\u5668\u7ed3\u6784\u7684\u6e90\u7535\u7f06\u4fa7\u7684\u7535\u6d41\u7eb9\u6ce2\uff0c\u8f93\u5165\u8def\u5f84\u4e2d\u4e32\u8054\u7684\u603b\u7535\u963b\u4e3a100 \u03a9\uff0c\u4f7f\u7528V\u578bLT8618\u5728= 28 V \u548c V\u5916= 5.5 V\uff0c82 \u03bcH\u7535\u611f\u3002\u7535\u6d41\u8109\u51b2\u76f8\u5f53\u4e8e\u8f93\u5165\u6ee4\u6ce2\u5668\u572810 mA\u8f93\u51fa\u7535\u6d41\u4e0b\u770b\u5230\u7684LT8618\u7a33\u538b\u5668\u7684\u8f93\u5165\u7535\u6d41\u3002<\/p>\n<p>\u3000\u3000\u5177\u6709100 \u03a9\u548c100 nF\u7684\u5355\u7ea7RC\u6ee4\u6ce2\u5668\u5728\u6e90\u7535\u7f06\u4fa7\u7684\u5cf0\u5cf0\u503c\u7eb9\u6ce2\u8d85\u8fc760 \u03bcA\u3002\u6e90\u7535\u7f06\u4fa7\u7684\u7eb9\u6ce2\u7535\u6d41\u968f\u7740\u7535\u5bb9\u7684\u589e\u52a0\u6216\u6ee4\u6ce2\u7ea7\u7684\u7ea7\u8054\u800c\u53d8\u5c0f\u3002\u9274\u4e8e\u964d\u538b\u7a33\u538b\u5668\u5728\u4f7f\u7528\u8f83\u5927\u7684\u76f4\u63a5\u8f93\u5165\u7535\u5bb9\u5668\u65f6\u6027\u80fd\u66f4\u597d\uff0c\u5e76\u4e142\u7ea7RC\u6ee4\u6ce2\u5668\u7684BOM\u6bd43\u7ea7\u6ee4\u6ce2\u5668\u66f4\u5c0f\uff0c\u540c\u65f6\u5728\u6e90\u7535\u7f06\u4fa7\u63d0\u4f9b\u76f8\u4f3c\u7684\u7535\u6d41\u7eb9\u6ce2\uff0c\u56e0\u6b64\u6211\u4eec\u5efa\u8bae\u4f7f\u7528\u6bcf\u7ea750 \u03a9\u548c47 nF\u76842\u7ea7\u6ee4\u6ce2\u5668\u3002\u6e90\u7535\u7f06\u4fa7\u7eb9\u6ce2\u7535\u6d41\u7ea6\u4e3a30 \u03bcA\uff0c\u76f8\u5e94\u5730\uff0c\u5b83\u5728250 \u03a9\u5206\u6d41\u7535\u963b\u4e0a\u4ea7\u751f\u7ea67.5 mV\u7684\u7eb9\u6ce2\u7535\u538b\uff0c\u8fd9\u5bf9\u4e8e8\u4f4d\u5206\u8fa8\u7387<u>AD<\/u>C\u6765\u8bf4\u51e0\u4e4e\u8db3\u591f\u4e86\u3002\u4e3a\u4e86\u8fdb\u4e00\u6b65\u964d\u4f4e\u7535\u7f06\u4fa7\u7eb9\u6ce2\u7535\u6d41\uff0c\u53ef\u4ee5\u5728\u6ee4\u6ce2\u5668\u4e2d\u4f7f\u7528\u66f4\u5927\u7684\u7535\u5bb9\u3002\u4f8b\u5982\uff0c\u5982\u679c\u7528100 nF\u7535\u5bb9\u4ee3\u66ff47 nF\u7535\u5bb9\uff0c\u5219\u7535\u7f06\u4fa7\u7eb9\u6ce2\u7535\u6d41\u53ef\u4ee5\u964d\u81f3\u4ec57 \u03bcA\uff0c\u76f8\u5f53\u4e8e1.75 mV\u7684\u7eb9\u6ce2\u7535\u538b\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"post-image\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10378\" title=\"pYYBAGNOdymAFQGWAAC9npspq4c169\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/pYYBAGNOdymAFQGWAAC9npspq4c169.jpg\" alt=\"pYYBAGNOdymAFQGWAAC9npspq4c169\" width=\"718\" height=\"324\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/pYYBAGNOdymAFQGWAAC9npspq4c169.jpg 718w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/pYYBAGNOdymAFQGWAAC9npspq4c169-300x135.jpg 300w\" sizes=\"(max-width: 718px) 100vw, 718px\" \/><\/div>\n<p>\u3000\u3000\u56fe 5.\u7535\u6d41\u73af\u8def\u6e90\u4fa7\u7684\u7535\u6d41\u7eb9\u6ce2\u3002\u56fe\u7247\u7531\u535a\u591a\u7684\u7535\u529b\u7cfb\u7edf\u63d0\u4f9b \uff3bPDF\uff3d<\/p>\n<p>\u3000\u3000\u5728\u5178\u578b\u7684\u7535\u6d41\u73af\u8def\u5e94\u7528\u4e2d\uff0c\u5ba2\u6237\u4f1a\u5728\u542f\u52a8\u671f\u95f4\u6307\u5b9a\u4e00\u4e2a\u7535\u6d41\u9650\u5236\uff08\u4f8b\u59823.2 mA\uff09\uff0c\u4f46\u53ef\u80fd\u8d85\u8fc7\u6b64\u9650\u5236\u7684\u6307\u5b9a\u77ed\u65f6\u95f4\u9664\u5916\u3002\u5728\u964d\u538b\u8f6c\u6362\u5668\u4e2d\uff0c\u901a\u5e38\u4f1a\u4ea7\u751f\u9ad8\u6d6a\u6d8c\u7535\u6d41\u6765\u5bf9\u8f93\u5165\u7535\u5bb9\u5668\u8fdb\u884c\u5145\u7535\u3002\u8f93\u5165\u6ee4\u6ce2\u5668\u7684\u529f\u80fd\u6709\u4e24\u4e2a\u65b9\u9762\uff1a\u9664\u4e86\u9650\u5236\u7535\u7f06\u6e90\u4fa7\u7684\u7eb9\u6ce2\u7535\u6d41\u5916\uff0c\u5b83\u8fd8\u6709\u52a9\u4e8e\u9650\u5236\u542f\u52a8\u6d6a\u6d8c\u7535\u6d41\u3002\u56fe6\u663e\u793a\u4e86\u4f7f\u75282\u7ea7\u8f93\u5165\u6ee4\u6ce2\u5668\u7684\u542f\u52a8\u884c\u4e3a\u671f\u95f4\u8f93\u5165\u7535\u6d41\u968f\u65f6\u95f4\u53d8\u5316\u7684\u53d8\u5316\uff0c\u8f93\u5165V\u572824 V\uff0c\u8f93\u51fa\u4fa7\u8d1f\u8f7d\u7535\u6d41\u4e3a4 mA\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"post-image\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10379\" title=\"poYBAGNOdyqALn2fAABr9rziPdw751\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyqALn2fAABr9rziPdw751.jpg\" alt=\"poYBAGNOdyqALn2fAABr9rziPdw751\" width=\"521\" height=\"400\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyqALn2fAABr9rziPdw751.jpg 521w, http:\/\/www.szryc.com\/wp-content\/uploads\/2022\/10\/poYBAGNOdyqALn2fAABr9rziPdw751-300x230.jpg 300w\" sizes=\"(max-width: 521px) 100vw, 521px\" \/><\/div>\n<p>\u3000\u3000\u56fe 6.\u5e26\u8f93\u5165\u6ee4\u6ce2\u5668\u7684\u542f\u52a8\u7535\u6d41\u4ee5\u9650\u5236\u6d6a\u6d8c\u7535\u6d41\uff08\u4ece\u9876\u90e8\uff1a\u8f93\u5165\u7535\u538b 20 V\/div\u3001\u8f93\u51fa\u7535\u538b 5 V\/div\u3001\u4f7f\u80fd\u3001\u7535\u7f06\u4fa7\u8f93\u5165\u7535\u6d41\u300110 mA\/div\uff09\u3002\u56fe\u7247\u7531\u535a\u591a\u7684\u7535\u529b\u7cfb\u7edf\u63d0\u4f9b 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