STEVAL-ISB013V1 STMicroelectronics

STEVAL-ISB013V1 Battery monitor demonstration board with alarm output for gas gauge applications based on the STC3105 Data brief 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) 2 I C interface for battery monitoring and device control Low power consumption: STEVAL-ISB013V1 100 A in active operating conditions 50 A in power saving operating conditions 2 A in standby mode 1 A 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. November 2011 Doc ID 018791 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Schematic diagram STEVAL-ISB013V1 1 Schematic diagram Figure 1. STEVAL-ISB013V1 circuit schematic 9&& 8 67& 5XS & 5XS N 5XS X) N N 9,1 /0 /0 9,1 5 6 9&& 6 9&& & X) 6&/ 1& 6&/ *1 &* *1 &* 5FJ 5 P &* - V 2/4 Doc ID 018791 Rev 1