Description
The STw4102 is a stand-alone constant-current constant-voltage (CCCV) linear charger dedicated for Li-Ion battery.
The STw4102 allows dual charging capability using the main input adaptor up to 1A (Wall adaptor, Car adaptor) or USB cable up to 500mA without external component. Upper 1A charging is possible by adding just one external transistor.

FEATUREs
■ Constant current constant voltage (CCCV)
   charger
■ Dual charging source (main adaptor or USB
   cable)
■ Fast charge current control up to 1A for main
   adaptor and up to 500mA for USB
■ Internal power device and sense resistor,
   option for external components for current
   higher than 1A
■ Programmable charge voltage (4.1V, 4.2V,
   4.3V, 4.35V) with 1% accuracy
■ Thermal regulation
■ Trickle charge mode at low battery voltage
■ Main adaptor voltage up to 16V
■ Battery overvoltage protection at 4.7V
■ Gas gauge with 13 bit AD converter
■ Battery voltage monitor with 7-12 bit ADC
■ I2C interface for device monitoring and control
■ Charge status output pin
■ Power detection output pin
■ Programmable watchdog security timer
■ 4.7V LDO regulator (external pmos)

APPLICATIONs
■ Cellular phones (GSM, CDMA, WCDMA),
   PDA, MP3 players, cordless phones
■ Digital camera, USB appliances, bluetooth