ST Life.augmented


Battery monitor IC with alarm output for gas gauge applications

The STC3105 battery monitor includes the hardware functions required to implement a low-cost gas gauge for battery monitoring. The STC3105 uses accurate measurements of the battery voltage to estimate a battery’s state-of-charge (SOC). It uses a low cost sense resistor to precisely sense the charge or discharge states, detect light-load conditions without ambiguity for voltage measurements, and accurate SOC calculation. The coulomb counter method is used for SOC tracking in high-load conditions.

An alarm output signals a low SOC condition, and can also indicate low battery voltage. The alarm threshold levels are programmable.

The device is programmable through an I2C interface.

pdf Please read
Errata Sheet
pdf データシート

Key Features

  • 0.5% accuracy battery voltage monitoring
  • Low battery alarm output with programmable thresholds
  • Low power: 60 μA in power-saving mode, 2 μA max in standby mode
  • Ideal for implementation of robust gas gauge systems using open-circuit voltage and coulomb counter methods
  • Small 3x2 mm package



Technical Documentation

Product Specifications

Description Version Size
DS8643: Battery monitor IC with alarm output for gas gauge applications
1.1 321 KB

Application Notes

Description Version Size
AN3395: Sensing resistor selection and usage in STC310x battery monitoring applications
1.2 149 KB

User Manual

Description Version Size
UM1054: STEVAL-ISB013v1 demonstration board based on the STC3105 battery monitor IC with alarm output for gas gauge applications
1.2 305 KB
UM1481: STEVAL-ISB012V1 Li-Ion battery monitor and gas-gauge based on the STC3105
1.0 5,356 KB

Presentations & Training Material


Description Version Size
Health and Wellness Mobility Cloud computing
1,347 KB

Related Tools and Software

Related Tools and Software

製品型名 Description
STEVAL-ISB012V1 Battery monitoring system demonstration board based on the STC3105
STEVAL-ISB013V1 Battery monitor demonstration board with alarm output for gas gauge applications based on the STC3105

サンプル& 購入

製品型名 Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STC3105IQTNRNDTDFN 3.0X2.0X0.75 8L PITCH 0.65Tape And Reel-4085_-1Distributor reported inventory date: 2015-11-28
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA29753000

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(**)弊社ホームページで入手できるMaterial Declaration(材料宣誓書)のフォームは、各パッケージ・タイプで最も一般的に使用されるパッケージに基づいた包括的な文書です。そのため、特定のデバイスについて100%正確ではない可能性があります。特定のデバイスに関する情報については、 弊社セールスオフィス にお問合せ下さい。
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