ST ISB013V1 User Manual

STEVAL-ISB013V1

Battery monitor demonstration board with alarm output for gas gauge applications based on the STC3105

Features

■Accurate battery voltage measurement

■Coulomb counter to monitor the battery state- of-charge (SOC)

■Internal 32.768 kHz time base

■Low-battery alarm output with programmable SOC and voltage thresholds

■Relaxation timer to track load condition (userprogrammable load current threshold)

■I2C interface for battery monitoring and device control

■Low power consumption:

–100 µA in active operating conditions

–50 µA in power saving operating conditions

–2 µA in standby mode

–1 µA in power-down mode

■RoHS compliant

Data brief

STEVAL-ISB013V1

Description

The STEVAL-ISB013V1 is a demonstration board based on the STC3105 battery monitor IC. The application monitors the voltage and current of a battery and includes a Coulomb counter to keep track of the charge/discharge status.

An alarm output signals a low state-of-charge (SOC) condition and/or low battery voltage. In addition, a relaxation register begins counting when the gas gauge is in a specified light-load condition, indicating when an OCV (open circuit voltage) measurement should be made for SOC correction.

November 2011	Doc ID 018791 Rev 1	1/4
For further information contact your local STMicroelectronics sales office.		www.st.com

Schematic diagram	STEVAL-ISB013V1

1 Schematic diagram

Figure 1. STEVAL-ISB013V1 circuit schematic

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2/4	Doc ID 018791 Rev 1