LTC4050 Lithium-Ion linear Battery Charger Controller with Thermistor Interface

The LTC®4050-4.1/LTC4050-4.2 are complete standalone constant-current/constant-voltage linear charge controllers for lithium-ion (Li-Ion) batteries. Charge current is programmable and final float voltage has ±1% accuracy.

When the input supply is removed, the LTC4050 automatically enters a low quiescent current sleep mode, dropping the battery drain current to 5µA. An internal comparator detects the near-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 cell voltage exceeds 2.49V. The thermistor interface suspends charging if the cell temperature is outside of a 0°C to 50°C temperature window.

The LTC4050 begins a new charge cycle when a discharged battery is connected to the charger or when the input power is applied. In addition, a new charge cycle is automatically started if the battery remains connected to the charger and the cell voltage drops below 3.88V for 4.1V cells or below 3.98V for 4.2V cells.

The LTC4050 is available in the 10-pin MSOP package

产品特点 Features

Complete Stand-Alone linear Charger Controller for 1-Cell Lithium-Ion Batteries
Thermistor Interface for Battery Temperature Sensing
Preset Charge Voltage with ±1% Accuracy
Programmable Charge Current
C/10 Charge Current Detection Output
Programmable Charge Termination Timer
Input Supply (Wall Adapter) Detection Output
4.5V to 10V Input Voltage Range
Automatic Sleep Mode When Input Supply is Removed (Only 5µA Battery Drain)
Automatic Trickle Charging of Low Voltage Cells
Automatic Battery Recharge
Battery Insertion Detection
Space Saving 10-Pin MSOP Package

应用

Cellular Phones
Handheld Computers
Charging Docks and Cradles

典型应用图

参数

LTC4050 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) *
LTC4050EMS-4.1	MSOP	10	E	$2.66	$2.25
LTC4050EMS-4.1#PBF	MSOP	10	E	$2.66	$2.25
LTC4050EMS-4.1#TR	MSOP	10	E		$2.31
LTC4050EMS-4.1#TRPBF	MSOP	10	E		$2.31
LTC4050EMS-4.2	MSOP	10	E	$2.66	$2.25
LTC4050EMS-4.2#PBF	MSOP	10	E	$2.66	$2.25
LTC4050EMS-4.2#TR	MSOP	10	E		$2.31
LTC4050EMS-4.2#TRPBF	MSOP	10	E		$2.31

LTC4050 数据手册及相关资料下载

数据手册(英文) : LTC4050 - Lithium-Ion linear Battery Charger Controller with Thermistor Interface.PDF
可靠性数据 : R449 Reliability Data .PDF
产品选型卡 : I2C Battery Gas Gauges.PDF