STEVAL-ISB008V1
Standalone USB Li-Ion battery charger demonstration board
based on the STw4102 and STM32F103C6
Data brief
Features
■
The STw4102 Li-Ion battery charger IC:
– supports battery charging by USB or
external DC adaptor
– includes an accurate gas gauge for
monitoring battery capacity
■
On-board STM32F103C6 microcontroller
enumerates and controls the STw4102 for
compliance with USB specifications
■
Includes dual-color LEDs to indicate
charging/discharging status
■
Suitable as a standalone Li-Ion battery charger
in various applications
■
RoHS compliant
STEVAL-ISB008V1
The STEVAL- ISB008V1 is equipped with both a
USB and a DC adapter connector.
Description
The STEVAL-ISB008V1 demonstration board is
based on the STw4102 battery charger device
and the STM32F103C6 microcontroller. The
board is designed as a complete standalone
battery charger, and includes a gas gauge to
monitor battery capacity using five LEDs to
represent different capacity levels. Two status
LEDs indicate battery charging, discharging and
some fault conditions.
The board can supply a maximum battery
charging current of 400 mA for a USB port,
extending to 800 mA for a DC adapter.
By default, the firmware programmed in the
demonstration board considers a battery capacity
of 1200 mAh. This maximum capacity value is
used to identify the percentage of available
battery capacity, which is shown using the 5
LEDs.
The demonstration board firmware allows the
user to vary the maximum capacity up to 2100
mAh, in steps of 300 mAH.
The STM32F103C6 microcontroller is used to
control and monitor the STw4102 battery charger
device.
All communication between the STw4102 and the
STM32F103C6 is done through an I2C interface.
November 2009
Doc ID 16764 Rev 1
For further information contact your local STMicroelectronics sales office.
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Schematic diagrams
STEVAL-ISB008V1
Schematic diagrams
STEVAL-ISB008V1 schematic diagrams
STEVAL-ISB008V1
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
10-Nov-2009
1
Changes
Initial release.
Doc ID 16764 Rev 1
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STEVAL-ISB008V1
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