Product details


Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 14000 Implementation System External capacity indication None Features CEDV algorithm, End of Service Operating temperature range (C) -40 to 85 Cell balancing open-in-new Find other Battery fuel gauges

Package | Pins | Size

TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other Battery fuel gauges


  • Automotive-Qualified AEC-Q100, Grade 3
  • 1-Series Cell Battery Fuel Gauge Supports Li-Ion, LiFePO4, and NiMH (3-Cell) Chemistries
    • Resides on System Board
    • Powers Directly from the Battery with Integrated LDO
    • Supports a Low-Value External Sense Resistor (10 mΩ)
  • Learning Load Enable (LEN) from Host
  • Ultra-Low Power Consumption in NORMAL (50 µA) and SLEEP (9 µA) Modes
  • Supports Replacement Batteries
  • Accurate End-of-Service (EOS) Determination for Batteries in Rarely Discharged Applications
  • CEDV Gas Gauge for 1-Series Cell Batteries, Providing:
    • State-of-Charge (SOC)
    • Time-to-Empty (TTE)
    • State-of-Health (SOH)
  • High-Side and Low-Side Current Sensing Options
  • Internal Temperature Sensor OR External Thermistor
  • Microcontroller Peripheral Interface Supports:
    • 400-kHz I2C™ Serial Interface
    • Configurable Interrupt (ALERT) for SOC, Battery Levels, Temperature Faults, and Charge/Discharge Status
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The bq34210-Q1 1-Series Cell System-Side CEDV Fuel Gauge provides fuel gauging and End-of-Service (EOS) Determination for 1-series cell batteries in applications that encounter infrequent discharge, such as eCall systems and uninterruptible power supplies (UPS) for backup during power failures, where batteries may stay connected to a charging power source most of their lifetime until needed. The bq34210-Q1 fuel gauge supports multiple battery chemistries, including Li-Ion, LiFePO4, and NiMH.

The gas gauging function uses voltage, current, and temperature data along with Compensated End-of-Discharge (CEDV) technology to provide State-of-Charge (SOC) and State-of-Health (SOH) data. The device’s EOS Determination function alerts when battery capability has degraded and is approaching the end of its usable service.

Battery fuel gauging with the bq34210-Q1 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery management system.

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Technical documentation

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Type Title Date
* Data sheet bq34210-Q1 Automotive 1-Series Cell System-Side CEDV Fuel Gauge for Rarely Discharged Batteries datasheet Sep. 17, 2018
User guide bq34210-Q1 Technical Reference Manual Sep. 17, 2018
User guide Quickstart Guide for bq34210-Q1 Sep. 22, 2017
User guide bq34210IQ1EVM-826 Evaluation Module Aug. 08, 2017
Technical article How active and passive cell balancing works Oct. 05, 2016

Design & development

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Hardware development

document-generic User guide
The BQ34210IQ1EVM-826 evaluation module together with a Windows 7 (or higher) PC, bqStudio, an USB interface (separate item, EV2400) and a battery enables development of a gauging solution geared towards rarely discharged applications.
  • CEDV fuel gauge
  • End of service determination for batteries in rarely discharged applications
  • State-of-charge
  • Time-to-empty
  • State-of-health

Software development

Battery Management Studio (bqStudio) Software
BQSTUDIO Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 

CAD/CAE symbols

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TSSOP (PW) 14 View options

Ordering & quality

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