STW4102

STw4102 Dual USB/wall adapter Li-ion battery charger with gas gauge Features ■ Constant current www.DataSheet4U.com linear charger ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 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 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) MAIN VOUT USBPWR DRIVER LDODRV LDOFB 1 2 3 4 5 6 7 8 9 10 11 12 18 17 16 15 14 13 VIO SCL SDA RESETN STDBY C32KHZ The STw4102 offers dual charging capability using separate inputs for USB cable and wall adapter, or a single input that accepts both. The STw4102 also offers programmable fast charge current using an external resistor. A thermal regulation circuit limits the charge current against the die high power dissipation or high ambient temperature. An end of charge output pin indicates the charge termination when ...