LTC1732-8.4 Lithium-Ion linear Battery Charger Controller

The LTC®1732-8.4 is a complete constant-current/constant-voltage linear charge controller for lithium-ion (Li-Ion) batteries. Nickel-cadmium (NiCd) and nickel metal-hydride (NiMH) batteries can also be charged with constant current using external termination. Charge current can be programmed with ±7% accuracy using external sense and program resistors. An internal resistor divider and precision reference set the final float voltage with ±1% accuracy.

When the input supply is removed, the LTC1732-8.4 automatically enters a low current sleep mode, dropping the battery drain current to 10µA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until battery voltage exceeds 4.9V.

The LTC1732-8.4 begins a new charge cycle when a discharged battery is connected to the charger or when the input power is applied. In additon, if the battery remains connected to the charger and the cell voltage drops below 8.05V, a new charge cycle will begin.

The LTC1732-8.4 is available in the 10-pin MSOP package

产品特点 Features

Complete linear Charger Controller for 2-Cell Lithium-Ion Batteries
Preset Charge Voltage with ±1% Accuracy
Programmable Charge Current
C/10 Charge Current Detection Output
Programmable Charge Termination Timer
Small, Thin 10-Pin MSOP Package
Input Supply (Wall Adapter) Detection Output
8.8V to 12V Input Voltage Range
Automatic Sleep Mode When Input Supply Is Removed (Only 10µA Battery Drain)
Automatic Trickle Charging of Low Voltage Cells
Programmable for Constant-Current-Only Mode
Battery Insertion Detect and Automatic Charging of Low-Battery
Automatic Battery Recharge

应用

Cellular Phones
Handheld Computers
Charging Docks and Cradles
Digital Cameras and Camcorders

典型应用图

参数

LTC1732-8.4 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) *
LTC1732EMS-4	MSOP	10	E	$2.52	$2.15
LTC1732EMS-4#PBF	MSOP	10	E	$2.52	$2.15
LTC1732EMS-4#TR	MSOP	10	E		$2.21
LTC1732EMS-4#TRPBF	MSOP	10	E		$2.21
LTC1732EMS-4.2	MSOP	10	E	$2.52	$2.15
LTC1732EMS-4.2#PBF	MSOP	10	E	$2.52	$2.15
LTC1732EMS-4.2#TR	MSOP	10	E		$2.21
LTC1732EMS-4.2#TRPBF	MSOP	10	E		$2.21
LTC1732EMS-8.4	MSOP	10	E	$2.52	$2.15
LTC1732EMS-8.4#PBF	MSOP	10	E	$2.52	$2.15
LTC1732EMS-8.4#TR	MSOP	10	E		$2.21
LTC1732EMS-8.4#TRPBF	MSOP	10	E		$2.21

LTC1732-8.4 数据手册及相关资料下载

数据手册(英文) : LTC1732-8.4 - Lithium-Ion linear Battery Charger Controller.PDF
可靠性数据 : R245 Reliability Data .PDF