LTC1734L 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
LTC1734L 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 典型应用
LTC1734L 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 数据手册及相关资料下载
  1. 数据手册(英文) : LTC1734L - Monolithic linear Lithium-Ion Battery Charger with Thermal Regulation.PDF
  2. 可靠性数据 : R402 Reliability Data .PDF