MAX1551+MAX9001组成的单节锂离子电池充电电路

2014-01-06 13:57:08来源: 互联网
There are many battery shapes that, unfortunately, allow users to incorrectly insert the battery. The simple circuit inFigure 1 gives a single-cell Li-ion battery charger added protection from damage due to backward battery insertion. In the circuit, the MAX1551 linear-mode single-cell Li-ion battery charger delivers the charging current to the cell from either an AC adapter or USB power supply. The MAX9001 is also powered from one of these supplies.


Figure 1. This circuit protects the MAX1551 single-cell Li-ion battery charger from surge current caused by backward battery insertion.

During normal operation, the MAX9001's comparator output is high and the FET is on. When the battery is inserted backwards, the MAX9001's output goes low, a condition that turns the FET off. This blocks the flow of potential battery surge current out of the BAT terminal. The rapid switching of the FET keeps the current surge to less than 50mA; that surge lasts for less than 200ns before dampening, as shown in Figure 2. Connecting the battery in reverse without this external protection would destroy the MAX1551.


Figure 2. The top curve of this oscilloscope capture represents the backward insertion of the battery in the Figure 1 circuit. The bottom curve is the battery current.

关键字:MAX1551  MAX9001  锂离子电池

编辑:神话 引用地址:http://www.eeworld.com.cn/mndz/2014/0106/article_22976.html
本网站转载的所有的文章、图片、音频视频文件等资料的版权归版权所有人所有,本站采用的非本站原创文章及图片等内容无法一一联系确认版权者。如果本网所选内容的文章作者及编辑认为其作品不宜公开自由传播,或不应无偿使用,请及时通过电子邮件或电话通知我们,以迅速采取适当措施,避免给双方造成不必要的经济损失。
论坛活动 E手掌握
微信扫一扫加关注
论坛活动 E手掌握
芯片资讯 锐利解读
微信扫一扫加关注
芯片资讯 锐利解读
推荐阅读
全部
MAX1551
MAX9001
锂离子电池

小广播

独家专题更多

富士通铁电随机存储器FRAM主题展馆
富士通铁电随机存储器FRAM主题展馆
馆内包含了 纵览FRAM、独立FRAM存储器专区、FRAM内置LSI专区三大部分内容。 
走,跟Molex一起去看《中国电子消费品趋势》!
走,跟Molex一起去看《中国电子消费品趋势》!
 
带你走进LED王国——Microchip LED应用专题
带你走进LED王国——Microchip LED应用专题
 
电子工程世界版权所有 京ICP证060456号 京ICP备10001474号 电信业务审批[2006]字第258号函 京公海网安备110108001534 Copyright © 2005-2016 EEWORLD.com.cn, Inc. All rights reserved