ST Life.augmented


Standalone USB Li-Ion battery charger demonstration board based on the STw4102 and STM32F103C6

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.

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.

The STEVAL- ISB008V1 is equipped with both a USB and a DC adapter connector.

The board can supply a maximum battery charging current of 400 mA for a USB port, extending to 800 mA for a DC adapter.

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Data Brief

Key Features

  • The STw4102 Li-Ion battery charger IC:supports battery charging by USB or external DC adaptorincludes 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


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB0925: Standalone USB Li-Ion battery charger demonstration board based on the STw4102 and STM32F103C6
1.1 114 KB

User Manual

Description Version Size
UM0678: STEVAL-ISB008V1, USB Li-Ion battery charger and gas gauge, based on the STw4102
1.2 1,281 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
Gerber files for STEVAL-ISB008V1 board
1.0 358 KB

Bill of Materials

Description Version Size
BOM for STEVAL-ISB008V1 board
1.0 10 KB

Schematic Pack

Description Version Size
STEVAL-ISB008V1 schematics
31 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STSW-ISB008 Setup for STEVAL-ISB008V1 board

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISB008V1NRNDSTM32F103C6T6A; STW4102IQTBuy Direct60.45Distributor reported inventory date: 2014-04-18
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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