This datasheet mainly introduces the features and functions of st w4102 dual usb/wall adapter li-ion battery charger with gas gauge
The STw4102 is a standalone constant current constant voltage (CCCV) linear charger specifically designed for Li-ion batteries. It supports dual charging capability using separate inputs for a USB cable and a wall adapter, or a single input that accepts both. The device features programmable charge voltage with 1% accuracy and supports fast charge currents up to 1 A for wall adapters and 500 mA for USB ports.
| Main charge current range | 100 mA to 1000 mA |
|---|---|
| Programmable charge voltage | 4.1 V, 4.2 V, 4.3 V, 4.35 V |
| Wall adapter voltage | up to 16 V |
| Battery overvoltage protection | 4.7 V |
| Gas gauge resolution | 13-bit AD converter |
| Operating temperature range | -30°C to 85°C |
The maximum fast charge current for the wall adapter is up to 1 A.
The maximum fast charge current for the USB port is up to 500 mA.
Yes, the charge voltage is programmable with 1% accuracy.