STC4054 - ST Microelectronics

STC4054 Standalone Linear Li-Ion Battery Charger

The STC4054 is a constant current/constant voltage charger for single cell Li-Ion batteries. No external sense resistor or blocking diode is Order code Part number STC4054GR September 2006 Package TSOT23-5L Rev. 1 Packaging 3000 parts per reel 1/17 www.st.com 17 www.DataSheet4U.com STC4054 Contents 1 2 3 4 5 6 Block diagram . . . . . . .

Features

or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current limitation can be programmed using a single resistor connectd between PROG pin and GND. The charge cycle is automatically terminated when the current flowing to the battery is 1/10 of the programmed value. If the external adaptor is removed, the STC4054 turns off and a 2µA current can flow from the battery to the device. The device can be put into Shutdown Mode, reducing the supply current to 25µA. The device also has a charge current monitor, under voltage lockout, automatic recharge. The device is packa.