AN2407

STBC08 description

3/14

1

STBC08 description

The STBC08 is a constant current/constant voltage charger for single cell Li-Ion battery. No

external sense resistor or blocking diode is required and its MLPD 3x3mm² 6L package

make it ideally suited for portable applications.

The STBC08 is designed to comply with USB power specifications. An internal block

regulates the current when the junction temperature increases in order to protect the device

when it operates in high power or high ambient temperature.

current.

The charge voltage is fixed at 4.2V, and the charge current limitation can be programmed

using a single resistor connected between pins PROG and GND. The charge cycle finishes

when the current flowing to the battery is 1/10 of the programmed value. If the external

adaptor is removed, the STBC08 switches off and only 2µA can flow from the battery to the

device. The device can be put into Shutdown Mode, reducing the supply current to 25µA.

Figure 1.

Block diagram