STEVAL-ISB014V2 STMicroelectronics

STEVAL-ISB014V2 Battery monitor with alarm output for gas gauge applications based on the STC3115 Data brief Description The STEVAL-ISB014V2 product evaluation board is based on the STC3115. This device includes the hardware functions required to implement a low-cost gas gauge for battery monitoring. It uses current sensing, Coulomb counting and accurate battery voltage measurements to estimate the state-of-charge (SOC) of the battery. An internal temperature sensor simplifies implementation of temperature compensation. An alarm output signals a low SOC condition and can also indicate low battery voltage. The alarm threshold levels are programmable. The STC3115 offers advanced features to ensure Features high performance gas measurement in all 0.25% accuracy battery voltage monitoring application conditions. Coulomb counter and voltage-mode gas gauge The STEVAL-ISB014V2 evaluation board is operations suitable for portable medical equipment, mobile phones, multimedia players and digital cameras. Robust initial open-circuit-voltage (OCV) measurement at power-up with debounce delay Low battery level alarm output with programmable thresholds Internal temperature sensor Battery swap detection Low power 45 A in power-saving mode 2 A max in standby mode 1.4 x 2.0 mm 10-bump CSP package RoHS compliant December 2013 DocID025626 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.comSchematic diagram STEVAL-ISB014V2 1 Schematic diagram Figure 1. STEVAL-ISB014V2 circuit schematic P1 VCC ALM 10 VCC 9 C1 SDA VCC 8 1uF 7 SCL C2 6 Rup1 220nF R1 Rup4 5 4.7k 0 1M GND Rup2 4 ALMA1 A3 VIN R4 4.7k ALM VIN 3 Rup5 CG+ Rup3 1k 2 SDAB1 4.7k 4.7k SDA R2 B BATD 1 BATD SCL C1 SCL 1k Header 10 R3 RSTIO C3 D3 CG+ P2 RSTIO 1k CG VIN 10 Rcg 9 10m VCC 8 U1 7 BATD STC3115 CSP 6 5 RSTIO 4 3 2 1 Header 10 AM17541v1 2/4 DocID025626 Rev 1 D1 B3 GND VCC