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.

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

设计

技术文档

产品规格
Description Version Size
DS8643 DS8643: Battery monitor IC with alarm output for gas gauge applications 1.1 320 KB
应用手册
Description Version Size
AN3395 AN3395: Sensing resistor selection and usage in STC310x battery monitoring applications 1.2 149 KB
用户手册
Description Version Size
UM1054 UM1054: STEVAL-ISB013v1 demonstration board based on the STC3105 battery monitor IC with alarm output for gas gauge applications 1.2 305 KB

演示和培训资料

简报
Description Version Size
Health and Wellness Mobility Cloud computing 1 MB

出版刊物和宣传资料

手册
Description Version Size
Brochure Power management guide 05.2016 7 MB

工具和软件

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样片和购买

型号 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
STC3105IQT TDFN 3.0X2.0X0.75 8L PITCH 0.65 Tape And Reel -40 85 NRND - - NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
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(*) 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

质量和可靠性

型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STC3105IQT NRNDTDFN 3.0X2.0X0.75 8L PITCH 0.65IndustrialEcopack3
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(**) The Material Declaration forms available on st.com 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.

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