LTC1734L-4.1 Lithium-Ion linear Battery Charger in ThinSOT

The LTC®1734L is a low cost, single cell, constant-current/constant-voltage Li-Ion battery charger controller. When combined with a few external components, the SOT-23 package forms a very small, low cost charger for single cell lithium-ion batteries. The LTC1734L is a lower charge current version of the LTC1734.

The LTC1734L provides a fixed float voltage of 4.2V with 1% accuracy (for 4.1V and 4.15V float voltages, contact LTC Marketing). Constant current is programmed using a single external resistor between the PROG pin and ground. Manual shutdown is accomplished by floating the program resistor while removing input power automatically puts the LTC1734L into a sleep mode. Both the shutdown and sleep modes drain near zero current from the battery.

Charge current can be monitored via the voltage on the PROG pin allowing a microcontroller or ADC to read the current and determine when to terminate the charge cycle. The output driver is both current limited and thermally protected to prevent the LTC1734L from operating outside of safe limits. No external blocking diode is required.

The LTC1734L can also function as a general purpose current source or as a current source for charging nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries using external termination

产品特点 Features

Low Profile (1mm) ThinSOT™ Package
Programmable Charge Current: 50mA to 180mA
No Blocking Diode Required
No Sense Resistor Required
1% Accurate Preset Voltage: 4.2V
Charge Current Monitor Output for Charge Termination
Automatic Sleep Mode with Input Supply Removal
Manual Shutdown
Negligible Battery Drain Current in Shutdown
Undervoltage Lockout
Self Protection for Overcurrent/Overtemperature

参数

应用

Cellular Telephones
Handheld Computers
Digital Cameras
Charging Docks and Cradles
Low Cost and Small Size Chargers
Programmable Current Sources

典型应用图

LTC1734L-4.1 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) *
LTC1734ES6-4.1	SOT	6	E	$1.55
LTC1734ES6-4.1#PBF	SOT	6	E	$1.55
LTC1734ES6-4.1#TR	SOT	6	E	$1.55	$1.31
LTC1734ES6-4.1#TRM	SOT	6	E	$1.55	$1.33
LTC1734ES6-4.1#TRMPBF	SOT	6	E	$1.55	$1.33
LTC1734ES6-4.1#TRPBF	SOT	6	E	$1.55	$1.31
LTC1734ES6-4.2	SOT	6	E	$1.55
LTC1734ES6-4.2#PBF	SOT	6	E	$1.55
LTC1734ES6-4.2#TR	SOT	6	E	$1.55	$1.31
LTC1734ES6-4.2#TRM	SOT	6	E	$1.55	$1.33
LTC1734ES6-4.2#TRMPBF	SOT	6	E	$1.55	$1.33
LTC1734ES6-4.2#TRPBF	SOT	6	E	$1.55	$1.31
LTC1734LES6-4.2	SOT	6	E	$2.03
LTC1734LES6-4.2#PBF	SOT	6	E	$2.03
LTC1734LES6-4.2#TR	SOT	6	E	$2.03	$1.31
LTC1734LES6-4.2#TRM	SOT	6	E	$2.03	$1.33
LTC1734LES6-4.2#TRMPBF	SOT	6	E	$2.03	$1.33
LTC1734LES6-4.2#TRPBF	SOT	6	E	$2.03	$1.31

LTC1734L-4.1 数据手册及相关资料下载

数据手册(英文) : LTC1734L - Monolithic linear Lithium-Ion Battery Charger with Thermal Regulation.PDF
可靠性数据 : R402 Reliability Data .PDF