STW4102 - STMicroelectronics

STW4102 Dual USB/wall adapter Li-ion battery charger

The STw4102 is a standalone constant current constant voltage (CCCV) linear charger specifically designed for Li-ion batteries. March 2008 Rev 2 ISET CVREF GND CVIS ICG+ ICG- 1/34 www.st.com 34 Contents STw4102 Contents 1 2 3 www.DataSheet4U.com Block diagram . .

Features

■ Constant current www.DataSheet4U.com linear charger
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■ constant voltage (CCCV) QFN 24 (Plastic micropackage) Pin connections (top view) PWRDETECTN TEST EOCHG BATTSENSE BATT SENSE 24 23 22 21 20 19 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 overvolta.