LTC4052-4.2 Lithium-Ion Battery Pulse Charger with Overcurrent Protection

The LTC®4052 is a complete standalone pulse charger with integrated MOSFET for 1-cell lithium-ion batteries.

An external sense resistor provides overcurrent limiting as a safety precaution against a user connecting a wall adapter with the incorrect or no current limit. The internal MOSFET prevents reverse battery current from flowing if the input voltage is shorted to ground, eliminating the need for a blocking diode.

As the battery accepts charge and approaches the programmed float voltage, the internal MOSFET begins switching off and on with the duty cycle gradually decreasing as the battery approaches a fully charged condition. A programmable timer terminates the charge cycle. The near end-of-charge C/10 condition is indicated at the CHRG pin when the average charge current falls to one tenth of the wall adapter current. Removing the input voltage puts the LTC4052 into a sleep mode, dropping the battery current drain to less than 1µA.

The LTC4052 is available in a tiny 8-pin thermally enhanced MSOP package

产品特点 Features

Very Low Power Dissipation: 350mW at 1A
Complete Standalone Pulse Charger for 1-Cell Lithium-Ion Batteries
Requires No Microcontroller, MOSFET or Blocking Diode
Sense Resistor Limits Maximum Current for Safety
Programmable Charge Termination Timer for
Maximum Capacity Charging
±1% Float Voltage Accuracy
Near End-of-Charge (C/10) Detection Output
AC Wall Adapter Present Output
Low Battery Drain when Input Supply Is Removed
Automatic Trickle Charge for Low Battery
Automatic Battery Refresh
Thermal Shutdown Protection
Tiny Thermally Enhanced MSOP Package

应用

Handheld Computers
Cellular Telephones
Cradle Chargers

典型应用图

参数

LTC4052-4.2 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC4052EMS8E-4.2	MSOP	8	E	$2.68	$1.85
LTC4052EMS8E-4.2#PBF	MSOP	8	E	$2.68	$1.85
LTC4052EMS8E-4.2#TR	MSOP	8	E		$1.91
LTC4052EMS8E-4.2#TRPBF	MSOP	8	E		$1.91

LTC4052-4.2 数据手册及相关资料下载

数据手册(英文) : LTC4052-4.2 - Lithium-Ion Battery Pulse Charger with Overcurrent Protection.PDF
可靠性数据 : R449 Reliability Data .PDF
产品选型卡 : I2C Battery Gas Gauges.PDF