STC4054 datasheet(1/17 Pages) STMICROELECTRONICS

部件名	STC4054

功能描述	800mA Standalone linear Li-Ion Battery charger with thermal regulation

PDF	17 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 17 page

September 2006

Rev. 1

1/17

17

STC4054

800mA Standalone linear Li-Ion

Battery charger with thermal regulation

Feature summary

■ Programmable charge current up to 800mA

■ No external MOSFET, sense resistors or

blocking diode required

■ Constant current / constant voltage operation

with thermal regulation to maximize charge

rate without risk of overheating

■ Charges single cell li-ion batteries directly from

USB port

■ Preset 4.2V charge voltage with 1% accuracy

■ Automatic recharge

■ Single charge status output pin

■ Charge current monitor output for gas gauging

■ C/10 Charge termination

■ 25µA supply current in shutdown mode

■ Low battery voltage detect for precharge

setting

■ Soft-start limits inrush current

■ TSOT23-5L package

Applications

■ Cellular telephones

■ PDAs

■ Bluetooth applications

■ Battery-powered devices

Description

The STC4054 is a constant current/constant

voltage charger for single cell Li-Ion batteries. No

external sense resistor or blocking diode is

required and its ThinSOT package make it ideally

suited for portable applications.

The STC4054 is designed to work within 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.

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

packaged in TSOT23-5L.

TSOT23-5L

www.st.com

Order code

Part number

Package

Packaging

STC4054GR

TSOT23-5L

3000 parts per reel

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