Data brief
For further information contact your local STMicroelectronics sales office.
November 2011 Doc ID 018791 Rev 1 1/4
4
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 (user-
programmable load current threshold)
■ I
2
C 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
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.
STEVAL-ISB013V1
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