STEVAL-ISB006V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Dual USB/wall adapter Li-Ion battery charger with gas gauge demonstration board based on the STw4102

STEVAL-ISB006V1
Dual USB/wall adapter Li-Ion battery charger with gas gauge
demonstration board based on the STw4102
Data Brief
Features
■ Constant current constant voltage (CCCV)
charger
■ Dual charging source (main adaptor or USB
cable)
■ Fast charge current control up to 1A for main
adaptor and up to 500 mA for USB
■ Internal power device and sense resistor,
option for external components for current
higher than 1A
■ 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
■ Main adaptor 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 ADC
■ I²C interface for device monitoring and control
■ Charge status output pin
■ Power detection output pin
■ Programmable watchdog security timer
■ 4.7 V LDO regulator (external MOSFET)
STEVAL-ISB006V1
current against the die high power dissipation or
high ambient temperature. An end of charge
output pin indicates the charge termination when
the fast charge current drops below 10% of the
programmed current value. The STw4102
contains an accurate gas gauge based on a 13 bit
AD converter. External resistor is used between
battery and ground to sense a charge/discharge
current. With a typical 30 mΩ resistor, current can
be up to 2.5 A.
Description
The STEVAL-ISB006V1 demonstration board is
based on the STw4102, a stand-alone constant-
current constant-voltage (CCCV) linear charger
dedicated for Li-Ion battery. This device allows
dual charging capability using the main input
adaptor up to 1A (wall adaptor, car adaptor) or
USB cable up to 500 mA without external
component. Upper 1 A charging is possible by
adding just one external transistor. This
demonstration board offers programmable fast
charge current up to 1A with external resistor. A
thermal regulation circuitry limits the charge
November 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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