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选型与应用说明","","ME4312是用于开关电源的高集成恒压恒流控制器，采用双控制环路实现输出电压与限流电流的同时调节。芯片内置1.21V、74mV与9mV多级电压基准及多路运放，用于生成理想电压值、极限电流检测与转灯比较逻辑。充电指示按电流状态切换红/绿灯，并通过11%迟滞抑制充满后的回跳。文档给出典型应用电路、转灯电路调试说明、脚位定义、极限参数、推荐工作条件与SOP8封装尺寸。",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/me4312-constant-voltage-constant-current-controller-selection-and-application-notes/560521/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/me4312-constant-voltage-constant-current-controller-selection-and-application-notes/560521.png","ImageObject",300,407,{"name":92,"@type":93},"Fahsai","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-21","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"ME4312如何实现恒压与恒流控制？","Question",{"text":112,"@type":113},"ME4312通过芯片内部的双控制环路，在电源适配器/电池充电器中同时实现恒压与恒流调节。1.21V电压基准配合运放用于形成理想电压值，74mV基准配合运放用于形成输出限流恒流检测的极限电流。","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"转灯（红绿灯）状态如何判断？",{"text":117,"@type":113},"充电电流正常时红灯亮、绿灯灭；当充电电流降低到极限电流的12%时，绿灯亮、红灯灭。为避免充满后的红绿灯回跳，转灯比较器加入11%迟滞。",{"name":119,"@type":110,"acceptedAnswer":120},"选型与使用时需要关注哪些关键参数？",{"text":121,"@type":113},"文档给出了极限参数（如VCC最大36V、结温150℃、存储温度-40~+150℃等）与推荐工作条件（电源电压2.5~36V、工作温度0~125℃），并提供电气特性指标（如静态工作电流、各控制环路传导增益与红绿灯转换阈值/迟滞）。","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},560521,1791847188,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":52,"language":139,"language_code":63,"site_id":62,"html_lang":140,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},549768702563,"https://ap-avatar.wpscdn.com/avatar/8000c4aa63b76e948b?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786536092046926083","用于电池充电器和适配器的恒压恒流控制器-ME4312  \n概述  \nME4312是一款适用于需要双控制环路实现恒压和恒流的开关电源的高集成解决方案。芯片内部集成一个 1.21V电压基准(±1%精度），一个74mV低电压基准，一个9mV超低电压基准和三个运放。1.21V电压基准结合一个运放使ME4312产生一个理想电压值用于电源适配器和电池充电器。74mV低电压基准结合另一个运放使得 ME4312产生一个理想的极限电流为输出限流恒流检测。一个9mV更低电压基准结合一个运放产生一个理想的转灯电路,且可通过Ictrl脚来调试电流检测及转灯电路。当电流正常充电时红灯亮，绿灯灭。当充电电流降低到极限电流的12%时，绿灯亮，红灯灭。在检测电池充满电后，为了防止红绿灯回跳，转灯比较器做了11%的迟滞。  \n应用场合  \n特点  \n● 恒压恒流控制  \n● 精确内部电压基准  \n● 很少外围器件  \n● 易于补偿  \n● 转灯电路可调  \n● 极宽的电压工作范围3-40V  \n● 低工作电流  \n● 充电状态指示功能  \n● 外围元器件少，整机成本低  \n封装形式  \n● 电源适配器 ● 8-pin SOP8  \n● 电池充电器  \n典型应用图（一般使用Rprm=0；Rprm可以调节转灯电路及迟滞，一般使用可以短接。）  \nRs  \nTo primary  \nVout+  \n\n|  | +\u003Cbr>| +\u003Cbr>| \u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>Red\u003Cbr>GND Green | R2\u003Cbr>R1 | + |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  | |  |  |\n|  |  |  |  |  |  |  |  |  |\n\n图.1 ME4312 典型应用电路  \n选购指南  \n1.产品型号说明  \nME 4312 X X G  \n环保标识封装形式  \nS-SOP8 产品系列产品品种产品类别公司标识  \n\n| 产品型号 | 产品说明 |\n| --- | --- |\n| ME4312AS8G | 封装形式： SOP8 |\n\n芯片脚位图  \nSOP-8  \n脚位功能说明  \n\n| 管脚(SOP8) | 符号 | 管脚定义描述 |\n| --- | --- | --- |\n| 1 | RED | 充电指示红灯 |\n| 2 | VOUT | 输出引脚，只有sink 电流 |\n| 3 | GND | 地 |\n| 4 | VCTRL | 输入引脚的电压控制回路 |\n| 5 | VCC | 电源 |\n| 6 | VSENSE | 输入引脚电流控制回路 |\n| 7 | ICTRL | 输入引脚电流控制回路 |\n| 8 | GREEN | 充电指示绿灯 |\n\n芯片功能框图  \nVcc  \nIctrl GND  \n极限参数  \n\n| 参数 | 符号 | 极限值 | 单位 |\n| --- | --- | --- | --- |\n| 电源电压 | VCC | 36 | V |\n| 输入电压 | VIN | -0.3 to VCC | V |\n| 结温 | TJ | 150 | ℃ |\n| 存储温度范围 | TSTG | -40~+150 | ℃ |\n| 焊锡温度（5秒内） | TLEAD | 260 | ℃ |\n| 封装热阻（结到壳热阻） | θJC | 92 | ℃/W |\n\n注：在极限值之外或任何其他条件下，芯片的工作性能不予保证。  \n推荐工作条件  \n\n| 参数 | 符号 | 最小值 | 典型值 | 最大值 | 单位 |\n| --- | --- | --- | --- | --- | --- |\n| 电源电压 | VCC | 2.5 |  | 36 | V |\n| 工作温度范围 | Ta | 0 |  | 125 | ℃ |\n\nME4312 电气特性  \n无特殊说明（Ta=25℃VCC=24V）  \n\n| 符号 | 参 数 | 条 件 | 最小值 | 典型值 | 最大值 | 单位 |\n| --- | --- | --- | --- | --- | --- | --- |\n| Icc | 静态工作电流 |  | 1.2 | 1.5 | 1.8 | mA |\n| Gmv | 电压控制环路传导增益 |  | 1 | 3.5 |  | mA/mV |\n| Vref\u003Cbr>IIBV | 电压控制环路参考电压\u003Cbr>电压控制环路输入偏置电流 | Vctrl=1.5V | 1.198 | 1.210 | 1.222 | V |\n|  |  |  |  | 50 |  | nA |\n| Gmi | 电流控制环路传导增益 |  | 1.5 | 7 |  | mA/mV |\n| VSENSE | 电流控制环路参考电压 | Iout=2.5mA | 70 | 74 | 78 | mV |\n| IIBI | ICTRL接-70mV时自身PIN输出电流 |  |  | 18 |  | uA |\n| VOL | 下拉电流10mA时输出电压 |  |  | 400 |  | mV |\n| IOS | 输出对电源的短路电流 | 恒压\u003Cbr>恒流 |  | 27 | 70 | mA |\n| VTH | 红灯脚由L-H,即红灯转绿灯电压点 |  |  | 9 |  | mV |\n| Hys | 红绿灯转换比较器迟滞电压 |  |  | 6 |  | mV |\n\n特性曲线  \n封装说明  \n● 封装类型: SOP8  \n| 参数 | 尺寸(mm) |  | 尺寸(Inch) |  |\n| --- | --- | --- | --- | --- |\n|  | 最小值 | 最大值 | 最小值 | 最大值 |\n| A | 1.350 | 1.750 | 0.053 | 0.069 |\n| A1 | 0.1 | 0.3 | 0.004 | 0.012 |\n| B | 1.27(Typ.) |  | 0.05(Typ.) |  |\n| b | 0.330 | 0.510 | 0.013 | 0.020 |\n| D | 5.8 | 6.2 | 0.228 | 0.244 |\n| E | 3.800 | 4.000 | 0.150 | 0.157 |\n| F | 4.7 | 5.1 | 0.185 | 0.201 |\n| L | 0.675 | 0.725 | 0.027 | 0.029 |\n| G | 0.32(Typ.) |  | 0.013(Typ.) |  |\n| R | 0.15(Typ.) |  | 0.006(Typ.) |  |\n| 􀁔1 | °\u003Cbr>7 |  | °\u003Cbr>7 |  |\n| 􀁔 | °\u003Cbr>8 |  | °\u003Cbr>8 |  |\n\n􀁺 本资料内容，随产品的改进，可能会有未经预告之更改。  \n􀁺 本资料所记载设计图等因第三者的工业所有权而引发之诸问题，本公司不承担其责任。另外，应用电路示例为产品之代表性应用说明，非保证批量生产之设计。  \n􀁺 本资料内容未经本公司许可，严禁以其他目的加以转载或复制等。  \n􀁺 本资料所记载之产品，未经本公司书面许可，不得作为健康器械、医疗器械、防灾器械、瓦斯关联器械、车辆器械、航空器械及车载器械等对人体产生影响的器械或装置部件使用。  \n􀁺 尽管本公司一向致力于提高质量与可靠性，但是半导体产品有可能按照某种概率发生故障或错误工作。为防止因故障或错误动作而产生人身事故、火灾事故、社会性损害等，请充分留心冗余设计、火势蔓延对策设计、防止错误动作设计等安全设计。  \nX-ON Electronics  \nLargest Supplier of Electrical and Electronic Components  \nClick to view similar products for Switching Controllers category:  \nClick to view products by Micro One manufacturer:  \nOther Similar products are found below :  \nLV5065VB-TLM-H LV5066V-TLM-H LV5725JAZ-AH 633888R MP2908AGF AZ7500EP-E1 NCP1012AP133G NCP1217P133GNCP1218AD65R2G NCP1234AD100R2G NCP1244BD065R2G NCP1336ADR2G NCP1587GDR2G NCP6153MNTWGNCP81005MNTWG NCP81101BMNTXG NCP81205MNTXG HV9123NG-G-M934 IR35207MTRPBF ISL6367HIRZ CAT874-80ULGT3 SJ6522AG SJE6600 TLE63893GV50XUMA1 IR35215MTRPBF SG3845DM NCP1216P133G NCP1236DD65R2G NCP1247BD100R2GNCP1250BP65G NCP4202MNR2G NCP4204MNTXG NCP6132AMNR2G NCP81141MNTXG NCP81142MNTXG NCP81172MNTXGNCP81203MNTXG NCP81206MNTXG NX2155HCUPTR UC3845ADM UBA2051C IR35201MTRPBF MA","cbCaipMv4nmc4FlZ","https://ap.wps.com/l/cbCaipMv4nmc4FlZ","pdf",677826,"Chinese","en","# 概述\n## 应用场合与特点\n## 封装形式\n## 典型应用电路\n# 选购指南\n## 产品型号说明\n## 芯片脚位图\n## 脚位功能说明\n## 芯片功能框图\n# 极限参数与推荐工作条件\n## 极限参数\n## 推荐工作条件\n# 电气特性\n## 特性曲线\n# 封装说明\n## SOP8 尺寸","[{\"question\":\"ME4312如何实现恒压与恒流控制？\",\"answer\":\"ME4312通过芯片内部的双控制环路，在电源适配器/电池充电器中同时实现恒压与恒流调节。1.21V电压基准配合运放用于形成理想电压值，74mV基准配合运放用于形成输出限流恒流检测的极限电流。\"},{\"question\":\"转灯（红绿灯）状态如何判断？\",\"answer\":\"充电电流正常时红灯亮、绿灯灭；当充电电流降低到极限电流的12%时，绿灯亮、红灯灭。为避免充满后的红绿灯回跳，转灯比较器加入11%迟滞。\"},{\"question\":\"选型与使用时需要关注哪些关键参数？\",\"answer\":\"文档给出了极限参数（如VCC最大36V、结温150℃、存储温度-40~+150℃等）与推荐工作条件（电源电压2.5~36V、工作温度0~125℃），并提供电气特性指标（如静态工作电流、各控制环路传导增益与红绿灯转换阈值/迟滞）。\"}]","ME4312恒压恒流控制器 - 选型与应用说明 | PDF",1791803407,25]