ST ISB013V1 User Manual

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

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

STEVAL-ISB013V1

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

$/0

6'$

6&/

*1'

5XS

N

9&&

5XS

N

5XS

N

5



8

67&

$/0

6'$

6&/

*1'

9,1

9&&

&

X)

9,1

5



9&&

&

X)

&*

5FJ

P

&*

!-V

2/4 Doc ID 018791 Rev 1

+ 2 hidden pages