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SD5054

Description
Standalone linear lithium battery charger with thermal regulation
CategoryPower/power management    Battery power management chip   
File Size2MB,8 Pages
ManufacturerSHOUDING
Websitehttp://www.shouding.net
SHOUDING is a global leader in the production and supply of high-quality, application-specific standard products in the broad distributed, logic and analog semiconductor markets. The service markets of SHOUDING are mainly for consumer electronics, LED, mobile power, computing, communications, industry and automotive manufacturing. SHOUDING's products include diodes, rectifiers, transistors, metal oxide semiconductor field effect transistors (MOSFET), protection devices, special function arrays, single-gate logic, amplifiers and comparators, Hall effect and temperature sensors; power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switches and linear regulators, as well as voltage references and devices with special functions, such as USB power switches, load switches, voltage monitors and motor controllers.
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Standalone linear lithium battery charger with thermal regulation

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Shouding
具有热调节功½的独立线性锂电池充电器
SD5054
概述
SD5054
是一个完整的单片锂离子电池恒流/恒
压线性电源管理芯片,
SOT
封装和极少的外围元
SD5054
件非常适合应用于便携式产品,而且
专 门 设 计 适 用 于
USB
的 供 电 规 格 。 基 于 内 部
MOSFET
结构,不需要外部感应电阻和隔离二极
½外部环境温度过高或在大功率工½时,热反
馈可以调节充电电流以降½芯片温度。充电电压被
固定在
4.2V,充电电流可通过外部电阻设½。½充
电电流在达到最终浮充电压之后降至设定值
1/10
时,
SD5054
将自动终止充电循环。
½输入端
(适配器或USB电源)
拔掉后,
SD5054
自动进入½电流状态,
电池漏电流将降到2μA以下。
SD5054
还可被设½于停止工½状态,½电源电
流降到25μA。
其½特性包括:充电电流监测,欠压锁闭,自动再
充电和状态引脚以显示充电结束。
特性
可编程充电电流,可达
750mA
不需外接
MOSFET,
传感电阻和隔离二极管
用于单节锂离子电池、
采用SOT封装的完整线性
充电器
恒流/恒压充电和热度调节功½½得充电过程高效
管理,而无过热危险
直接从
USB
接口管理单节锂离子电池充电
预设充电电压
4.2V ±
1%
充电电流输出监控
自动重新充电
充电状态指示
1/10
充电电流终止充电
停止工½状态电流25uA
2.9V涓流充电阀值电压
½启动限制浪涌流
5脚 SOT-23
封装½式
封装
SOT23-5L
应用
手机
PDA、 MP3、MP4
充电器
蓝牙、GPS导航仪
典型应用电路图
图1 典型应用电路
www.shouding.net
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