Gas gauge IC with battery charger control for handheld applications

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 a missing or swapped battery.

Key Features

  • Patented OptimGauge™ algorithm for accurate battery capacity calculation
  • 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 μA in voltage-only mode, 2 μA max in standby mode
  • 1.49 x 1.594 mm 9-bump CSP package


Technical Documentation

Product Specifications
Description Version Size
DS10129 DS10129: Gas gauge IC with battery charger control for handheld applications 3.0 750 KB
Application Notes
Description Version Size
AN4870 AN4870: STC3117 system integration 1.0 1 MB

Presentations & Training Material

Description Version Size
Health and Wellness Mobility Cloud computing 1 MB

Publications and Collaterals

Description Version Size
Brochure Power management guide 09.2017 3 MB
Support & Community

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STC3117IJT Chip Scale Package 0.4mm pitch Tape And Reel -40 85 Active - - NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STC3117IJT ActiveChip Scale Package 0.4mm pitchIndustrialEcopack3 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.