XT2057 Datasheet | Silinktek

Description The XT2057 is a plete constant-current/ constant voltage linear charger for cell lithium-ion batteries. Its package and low external ponent count make the XT2057 ideally suited for portable applications. The charge current can be programmed externally with a single resistor. XT2057 determines the charge mode by detecting the battery voltage: Pre-charge, constant current charging, constant voltage charging. The charge current of pre-charging and constant - current charging is adjustable. The XT2057 is monitored by temperature monitor during the constant-current and constant-voltage charging. There are two LEDs indicate the charge mode. The XT2057 charger converters are available in the SOP-8 packages (or upon request). - Applications - Charger for Li-Ion Coin Cell Batteries - Portable MP3 Players, Wireless Headsets - Bluetooth Applications - Multifunction Wristwatches - Typical Application Circuit - Features - Preset 8.4V Charge Voltage with 1% Accuracy - Input Voltage: ≥8.8V - Pre-Charging, the Charge Current is adjustable - Ideal for Dual-Cell（8.4V）Li-Ion Batteries - Constant -Current Charging, the Charge Current is adjustable - Constant-Voltage Charging - Constant-Current/Constant-Voltage - Charging with Temperature Monitoring - Automatic Recharge - Double LEDs Charge Status Indication - Available in SOP-8 Package - Package - SOP-8 Rev.1.0 - May. 16, 2011 1 http://.silinktek. - Pin Assignment CHRG1 1 TS 2 GND 3 VOUT 4 8 VIN 7 CHRG2 6 CS 5 PDR1 SOP-8 (TOP VIEW) - Absolute Maximum Ratings SOP-8 1 2 3 4 5 6 7 8 Pin Name CHRG1 TS GND VOUT PDR1 CS CHRG2 VIN Function Open-Drain Charge Status Output Temperature Sense Ground Charge Current Output Charge Current Monitor And Shutdown Pin Charge Current Program Open-Drain Charge Status Output Positive Input Supply Voltage Parameter Input Supply Voltage TS、CHRG1、CHRG2、PDRI、CS Maximum Junction Temperature Operating Temperature Range Storage Temperature Lead Temperature(Soldering,10 sec) Symbol...