Description
The STw4102 is a standalone constant current constant voltage (CCCV) linear charger specifically designed for Li-ion batteries.
The STw4102 offers dual charging capability using separate inputs for USB cable and wall adapter, or a single input that accepts both.

FEATUREs
■ Constant current constant voltage (CCCV)
   linear charger
■ Common or separate USB/wall adapter inputs
■ Fast charge current control up to 1 A for wall
   adapter and up to 500 mA for USB
■ Support for currents higher than 1 A using
   external components
■ Programmable charge voltage (4.1 V, 4.2 V,
   4.3 V, 4.35 V) with 1% accuracy
■ Thermal regulation
■ Trickle charge mode at low battery voltage
■ Wall adapter voltage up to 16 V
■ Battery overvoltage protection at 4.7 V
■ Gas gauge with 13-bit AD converter
■ Battery voltage monitor with 7-12 bit AD
   converter
■ I2C interface for device monitoring and control
■ Charge status output pin
■ Power detection output pin
■ Programmable watchdog security timer
■ 4.7 V LDO regulator (with external power
   MOSFET)

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