STC3117IJT STMicroelectronics

STC3117 Gas gauge IC with battery charger control for handheld applications Datasheet - production data Description The STC3117 includes the STMicroelectronics OptimGauge algorithm. It provides accurate battery state-of-charge (SOC) monitoring, tracks battery parameter changes with operation conditions, temperature, and aging, and allows the application to get a battery state-of-health (SOH) indication. An alarm output signals low SOC or low voltage conditions and also indicates fault conditions like CSP (1.49 x 1.594 mm) a missing or swapped battery. Features PatentedOptimGaugealgorithmforaccurate batterycapacitycalculation Robust initial open-circuit-voltage (OCV) measurement at power up Programmable low battery alarm Missing/swapped battery detection Average current internal calculation End-of-charge detection Internal temperature sensor Battery swap detection with protection against false battery insertion Low power: 40 A in voltage-only mode, 2 A max in standby mode 1.49 x 1.594 mm 9-bump CSP package Applications Mobile phones, multimedia players, digital cameras Portable medical equipment November 2017 DocID025792 Rev 3 1/35 This is information on a product in full production. www.st.comContents STC3117 Contents 1 Block diagram 4 2 Pin assignment . 5 3 Absolute maximum ratings and operating conditions . 6 4 Electrical characteristics . 7 5 Application information . 10 6 Functional description 11 6.1 Battery monitoring functions 11 6.1.1 Operating modes 11 6.1.2 Battery voltage monitoring . 11 6.1.3 Internal temperature monitoring . 12 6.1.4 Current sensing in mixed mode . 12 6.1.5 SOC change rate in voltage mode . 12 6.2 STC3117 gas gauge architecture . 13 6.2.1 Coulomb counter 13 6.2.2 Voltage gas gauge algorithm . 14 6.2.3 Mixed mode gas gauge system . 15 6.3 Alarm output . 16 6.4 Current monitoring 17 6.5 Power-up and battery swap detection . 18 2 7I C interface . 21 7.1 Read and write operations 21 7.2 Register map and description 23 7.2.1 Register map . 23 7.2.2 Register description 24 7.2.3 REG MODE and REG CTRL register description 25 7.2.4 OCV table register description 27 8 Package information 28 2/35 DocID025792 Rev 3