Product details


Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, >4 Cells, Single Cell Communication interface HDQ, I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 29000 Implementation Pack, System External capacity indication LED Features Impedance Track™ algorithm, SHA-1 Authentication 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


  • Supports Li-ion, LiFePO4, PbA, NiMH, and NiCd chemistries
  • Capacity estimation using patented Impedance Track™ technology for batteries from 3 V to 65 V
    • Aging compensation
    • Self-discharge compensation
  • Supports battery capacities up to 29 Ah with standard configuration options
  • Supports charge and discharge currents up to 32 A with standard configuration options
  • External NTC thermistor support
  • Supports two-wire I2C and HDQ single-wire communication interfaces with host system
  • SHA-1/HMAC authentication
  • One- or four-LED direct display control
  • Five-LED and higher display through port expander
  • Reduced power modes (typical battery pack operating range conditions)
    • NORMAL operation: < 145-µA average
    • SLEEP: < 84-µA average
    • FULL SLEEP: < 30-µA average
  • Package: 14-pin TSSOP
open-in-new Find other Battery fuel gauges


The BQ34Z100-G1 device is an Impedance Track™ fuel gauge for Li-ion, PbA, NiMH, and NiCd batteries, and works independently of battery series-cell configurations. Batteries from 3 V to 65 V can be easily supported through an external voltage translation circuit that is controlled automatically to reduce system power consumption.

The BQ34Z100-G1 device provides several interface options, including an I2C slave, an HDQ slave, one or four direct LEDs, and an ALERT output pin. Additionally, the BQ34Z100-G1 provides support for an external port expander for more than four LEDs.

open-in-new Find other Battery fuel gauges

Technical documentation

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Type Title Date
* Data sheet BQ34Z100-G1 Wide Range Fuel Gauge with Impedance Track™ Technology datasheet (Rev. D) Apr. 15, 2021
* User guide bq34z100-G1 Technical Reference Manual Jul. 26, 2018
User guide BQ34Z100-G1 Technical Reference Manual (Rev. A) Aug. 06, 2021
User guide bq34z100EVM Wide Range Impedance Track Enabled Battery Fuel Gauge (Rev. B) Apr. 16, 2021
Application note BQ34Z100 to BQ34Z100-G1 Change List Apr. 15, 2021
White paper 以工業電池組為運輸替代方案提供電源 Mar. 17, 2020
White paper 산업용 배터리 팩을 통해 수송 수단에 대체 전력 공급 Mar. 17, 2020
White paper Powering Alternative Forms of Transportation with Industrial Battery Packs Feb. 19, 2020
Technical article Power to the pedal: Achieving longer-lasting 13S, 48-V lithium-ion battery packs for e-bikes and e-scooters Mar. 07, 2019
Technical article Searching for the newest innovations in power? Find them at APEC Feb. 09, 2019
Application note Simple Guide to Chemical ID Selection Tool (GPC) (Rev. A) Jun. 05, 2018
User guide Quickstart Guide for the bq34z100-G1 Apr. 20, 2018
Application note Gauge Communication Jan. 12, 2017
Application note Using I2C Communications With the bq34110 bq35100 and bq34z100-G1 Series of Gas Nov. 09, 2016
Application note Enhanced Resolution Gauging for Low Current Applications Using Scaling Oct. 26, 2016
Application note bq34z100-G1 High Cell Count and High Capacity Applications Sep. 29, 2015
Technical article Multiple battery chemistries, single device! Jun. 16, 2015
Application note Configuring the bq34z100 Data Flash Nov. 13, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

This evaluation module (bq34z100EVM) is a complete evaluation system for the bq34z100 wide range fuel gauge for lithium ion chemistries when combined with an EV2400 USB adapter and Windows™-based PC software downloadable from the website. The circuit module includes one bq34z100 (...)

  • Complete evaluation system for the bq34z100 advanced gas gauge with Impedance Track™ technology
  • Populated circuit module for quick setup
  • Link to software allowing data logging for system analysis

Software development

Production Application Software for Hi-Cell Count Battery Fuel (Gas) Gauges
BQ-HI-PRODUCTION — Hi-cell bqProduction offers a full suite of robust tools to assist with the process of configuring, calibrating, manufacturing and tracking printed circuit boards utilizing TI Battery management products. This includes features that allow writing a golden image followed by different types of (...)
  • Support for EV2300
  • Uses industry standard Motorola SREC format golden image programmer
  • Calibration and test automation
  • Unique serial number assignment/programming
  • Supports bq34z100-G1, bq34110
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 
Gauging Parameter Calculator: Match chemistry for Impedance Track gauges
GPCCHEM GPC Chemistry ID matching for Impedance Track (IT) algorithm gas gauges (Find closest chemistry match) must be done before Optimizing room temperature or low temperature performance.

Gauging Parameter Calculator Chemistry ID matching for Impedance track gas gauges (GPCCHEM) is a math calculation and (...)

Gauging Parameter Calculator: Optimize room temperature performance for Impedance Track gauges
GPCRA0 Gauging Parameter Calculator – Optimize room temperature performance for Impedance track gas gauges (GPCRA0) / Golden GG Maker is a math calculation tool that helps the battery designer to refine the Impedance Track battery gauge parameters for a given battery profile. It provides optimized (...)
SLUC564FW.ZIP (2777 KB)
SLUC580.ZIP (4170 KB)

Reference designs

Accurate gauging and 50-μA standby current, 13-S, 48-V li-ion battery pack reference design
TIDA-010030 — This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 14 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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Support & training

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