Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 32000 Implementation Pack External capacity indication None Features Impedance Track™ technology, Integrated Protector, SHA-256 Authentication Operating temperature range (°C) -40 to 85 Rating Catalog
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 32000 Implementation Pack External capacity indication None Features Impedance Track™ technology, Integrated Protector, SHA-256 Authentication Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YAH) 15 5.4488 mm² 2.78 x 1.96
  • Integrated battery gas gauge and protector
  • Flash-programmable custom BQBMP RISC CPU
    • SHA-256 authentication
    • 400-kHz I2C bus communications interface
  • Low-voltage (2.0 V) operation
  • Two independent precision 16-bit ADCs
    • Coulomb counting ADC with current sense resistor down to 1 mΩ
    • Voltage ADC for cell voltage and external andinternal temperature sensors
  • Battery fuel gauging based on patented Impedance Track™ technology
    • Models battery discharge curve for accurate time-to-empty predictions
    • Automatically adjusts for aging-, temperature-, and rate-induced effects on the battery
  • Battery Kelvin sense differential analog output pins with built-in protection
  • High-side or low-side current sensing
  • Programmable hardware-based protection
    • High-side FET gate drivers
    • Overvoltage and undervoltage (OVP and UVP)
    • Overcurrent in discharge and overcurrent in charge (OCD and OCC)
    • Short circuit in discharge (SCD)
    • Firmware-based overtemperature (OT)
  • Reduced typical power modes
    • SLEEP mode: 20 µA
    • SHIP mode: 10 µA
    • SHELF mode 5 µA
    • SHUTDOWN mode: 0.2 µA
  • Ultra-compact, 15-ball NanoFree™ DSBGA
  • Integrated battery gas gauge and protector
  • Flash-programmable custom BQBMP RISC CPU
    • SHA-256 authentication
    • 400-kHz I2C bus communications interface
  • Low-voltage (2.0 V) operation
  • Two independent precision 16-bit ADCs
    • Coulomb counting ADC with current sense resistor down to 1 mΩ
    • Voltage ADC for cell voltage and external andinternal temperature sensors
  • Battery fuel gauging based on patented Impedance Track™ technology
    • Models battery discharge curve for accurate time-to-empty predictions
    • Automatically adjusts for aging-, temperature-, and rate-induced effects on the battery
  • Battery Kelvin sense differential analog output pins with built-in protection
  • High-side or low-side current sensing
  • Programmable hardware-based protection
    • High-side FET gate drivers
    • Overvoltage and undervoltage (OVP and UVP)
    • Overcurrent in discharge and overcurrent in charge (OCD and OCC)
    • Short circuit in discharge (SCD)
    • Firmware-based overtemperature (OT)
  • Reduced typical power modes
    • SLEEP mode: 20 µA
    • SHIP mode: 10 µA
    • SHELF mode 5 µA
    • SHUTDOWN mode: 0.2 µA
  • Ultra-compact, 15-ball NanoFree™ DSBGA

The Texas Instruments BQ27Z746 Impedance Track™ gas gauge solution is a highly integrated, accurate 1-series cell gas gauge and protection solution.

The BQ27Z746 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, differential battery sensing analog output, and authentication for 1-series cell Li-ion and Li-polymer battery packs.

The BQ27Z746 gas gauge communicates through an I2C compatible interface and combines an ultra-low power TI BQBMP processor, high accuracy analog measurement capabilities, integrated flash memory, N-CH high-side FET drive, and a SHA-2 Authentication transform responder into a complete, high-performance battery management solution.

The Texas Instruments BQ27Z746 Impedance Track™ gas gauge solution is a highly integrated, accurate 1-series cell gas gauge and protection solution.

The BQ27Z746 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, differential battery sensing analog output, and authentication for 1-series cell Li-ion and Li-polymer battery packs.

The BQ27Z746 gas gauge communicates through an I2C compatible interface and combines an ultra-low power TI BQBMP processor, high accuracy analog measurement capabilities, integrated flash memory, N-CH high-side FET drive, and a SHA-2 Authentication transform responder into a complete, high-performance battery management solution.

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Technical documentation

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Type Title Date
* Data sheet BQ27Z746 Impedance Track Technology Battery Gas Gauge and Protection Solution for 1-Series Cell Li-Ion Battery Packs datasheet (Rev. A) PDF | HTML 08 Dec 2021
Application note Battery Gauging Algorithm Comparison PDF | HTML 04 Dec 2023
User guide BQ27Z746 Impedance Track Battery Gas Gauge and Protection Solution for 1-Series (Rev. A) PDF | HTML 19 Oct 2023
User guide BQ27Z746-R1 Technical Reference Manual PDF | HTML 17 Oct 2023
Application note Design Flexibility for Reverse Charge Protection Using BQ27Z746 PDF | HTML 02 Aug 2023
Certificate BQ27Z746EVM-047 EU RoHS Declaration of Conformity (DoC) 01 Nov 2021
User guide BQ27Z746 Technical Reference Manual PDF | HTML 27 Oct 2021

Design & development

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

Evaluation board

BQ27Z746EVM-047 — BQ27Z746 evaluation module Impedance Track™ technology battery gas gauge with protection solution

The BQ27Z746EVM-047 evaluation module (EVM) is a complete evaluation system for the BQ27Z746 battery manager. The EVM includes BQ27Z746 with integrated protection circuit module and a link to Windows® based PC software. The BQ27Z746 integrated circuit (IC) and all onboard components are (...)

User guide: PDF | HTML
Not available on TI.com
Application software & framework

BQSTUDIO-TEST Battery Management Studio (bqStudio) Software – Beta version downloads

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 (...)

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76905 Low-power monitor and protector for 2S to 5S with high accuracy cell voltage measurement BQ76907 Low-power monitor and protector for 2S to 7S with high accuracy cell voltage measurement BQ769142 3-s to 14-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 battery BQ76942 3-series to 10-series multicell battery monitor and protector BQ76952 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 BQ76972 3s-to-16s high-accuracy battery monitor and protector for Li-ion, Li-poly and LiFePO4
Battery charger ICs
BQ24800 SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25756 Stand-alone or I²C-controlled 70-V bidirectional buck-boost charge controller with MPPT BQ25790 Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27427 Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor BQ27520-G4 System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27545-G1 Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z746 Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 CEDV li-ion gas gauge and battery management controller BQ78Z100 Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Battery protectors
BQ77307 Low-power protector for 2S to 7S with high accuracy cell voltage measurement
Hardware development
Evaluation board
MKST-3P-ALT-EV2300 MKS Technology alternative for EV2300 communications transceiver
Download options
Firmware

BQ27Z746-DEVICE-FW Firmware for BQ27Z746 family of gauges

The BQ27Z746-DEVICE-FW is a firmware (FW)-only release that can be flashed onto any existing hardware such as BQ27Z746 product. The firmware incorporates the patented Impedance Track™ technology to create a pack-based solution that provides a rich array of features for gas gauging, protection, (...)

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
BQ27Z746 Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector
Hardware development
Evaluation board
BQ27Z746EVM-047 BQ27Z746 evaluation module Impedance Track™ technology battery gas gauge with protection solution
Software
Application software & framework
BQSTUDIO Battery Management Studio (bqStudio) Software
Design tool
GASGAUGECHEM-SW Gas gauge chemistry updater
Download options
Software programming tool

BQ-BMS-PROGRAMMER-SW Command line programmers for BQ products

BQ-BATTERY-PROGRAMMER-SW software development kit (SDK) is a collection of robust software command line tools that assist with the process of programming, testing, or assembling packs that use TI Battery management products. The executables in this software work with the MKST-3P-ALT-EV2300 MKS (...)

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
BQ20Z40 SBS Compliant Gas Gauge with Impedance Track Technology for use with BQ29330 BQ20Z40-R1 SBS 1.1 compliant Gas Gauge with Impedance Track™ Technology BQ20Z70-V150 SBS 1.1-compliant gas gauge enabled with Impedance Track™ technology BQ20Z70-V160 SBS 1.1-compliant gas gauge enabled with Impedance Track™ technology for use with the bq29330 BQ20Z80 SBS 1.1-compliant gas gauge enabled with Impedance Track™; technology for use with the bq29312 BQ20Z80-V102 SBS 1.1-compliant gas gauge enabled w/Impedance Track™ technology BQ20Z80-V110 SBS 1.1-compliant gas gauge enabled w/Impedance Track™ technology with FW v1.10 BQ20Z80A-V110 SBS 1.1 compliant gas gauge enabled with Impedance Track™; technology for use with the bq29312A BQ27505-J2 System-side Impedance Track™; fuel gauge with FW v2.15 BQ27505-J3 System-side Impedance Track™; fuel gauge with FW v2.20 BQ27505-J4 System-side Impedance Track™; fuel gauge with FW v2.24 BQ27505-J5 System-side Impedance Track™; fuel gauge with FW v2.29 BQ27520-G4 System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27545-G1 Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27741-G1 Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z558 Single-cell Impedance Track™ technology gas gauge with 1.2V IO support BQ27Z561 Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z561-R1 Impedance Track™ battery gas gauge solution for 1-series cell Li-ion battery packs BQ27Z561-R2 Impedance track battery gas gauge solution for 1-series cell li-ion battery packs BQ27Z746 Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 Battery fuel gauge with integrated protector for 1-2 series packs BQ28Z610-R1 Battery fuel gauge with integrated protector for 1-2 series packs BQ28Z620 Battery fuel gauge with integrated protector for 1-series to 2 series packs with 1.2-V I/O BQ3050 SBS 1.1-compliant 2-s to 4-s battery gas gauge & protection BQ3055 2-series, 3-series, and 4-series Li-ion battery pack manager BQ3060 SBS 1.1-compliant gas gauge and protector BQ30Z554-R1 2 series, 3 series, and 4 series Li-ion battery pack manager BQ34110 Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100 1-s to 16-s Impedance Track™ fuel gauge | battery gas gauge BQ34Z100-G1 Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ34Z100-R2 Multichemistry Impedance Track™ stand-alone fuel gauge BQ34Z110 Wide range fuel gauge with Impedance Track™; for lead acid batteries | battery gas gauge BQ35100 Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ78350 Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 CEDV li-ion gas gauge and battery management controller BQ78350-R1A CEDV li-ion gas gauge and battery management controller
Hardware development
Evaluation board
ADVANCED-BQMTESTER Texas Instruments Advanced bqMTester Multi-Station Test and Program Board BQ27510EVM System-Side Single-Cell Impedance Track™ Technology Evaluation Module  | Battery Fuel Gauge BQ27520EVM System-Side Impedance Track™ Battery Fuel Gauge Evaluation Module | Gas Gauge BQ27530EVM BQ27530EVM System-Side Impedance-Track Fuel (Gas) Gauge Direct Battery Connection Evaluation Module BQ27531EVM Battery Management Unit Impedance Track Fuel (Gas) Gauge Charger Controller Evaluation Module BQ27532EVM-656 Battery Charging Solution Evaluation Module BQ27542EVM Li-ion Battery Fuel Gauge Evaluation Module BQ27545EVM BQ27545EVM Single Cell, Pack Side, Impedance Track Fuel Gauge Evaluation Module BQ27546EVM-702 bq27546 Gas Gauge with Impedance Track™ Technology BQ27741EVM BQ27741EVM Pack-Side Impedance Track Fuel (Gas) Gauge Integrated Protector Evaluation Module BQ27742EVM bq27742-G1 Single Cell Li-ion Battery Fuel (Gas) Gauge Programmable Evaluation Module BQ27750EVM-837 BQ27750 1-Cell Programmable Battery Manager Evaluation Module BQ27Z558EVM-084 BQ27Z558 evaluation module for single-cell Impedance Track™ technology gas gauge BQ27Z561EVM-011 BQ27Z561 1S-cell programmable battery manager Evaluation module BQ27Z746EVM-047 BQ27Z746 evaluation module Impedance Track™ technology battery gas gauge with protection solution BQ28Z610EVM-532 BQ28Z610 1-Cell to 2-Cell Programmable Battery Manager Evaluation Module BQ28Z620EVM-071 BQ28Z620 evaluation module for one- or two-series cell Li-Ion Impedance Track™ battery fuel gauge BQ3050EVM-001 bq3050EVM SBS 1.1 Compliant Advanced Gas Gauge EVM BQ34110EVM-796 bq34110 Multi-Chemistry CEDV Battery Gas Gauge for Rarely Discharged Applications Evaluation Module BQ34210IQ1EVM-826 bq34210-Q1 Evaluation Module for System Side CEDV Fuel Gauge BQ34Z100EVM Bq34z100EVM 1s to 16s Impedance Track Fuel Gauge Battery Evaluation Module | Gas Gauge Battery BQ35100EVM-795 bq35100 Lithium Primary Cell Evaluation Module Using End-of-Service Monitor Gas Gauging BQ4050EVM-561 1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module BQ40Z50EVM-561 BQ40Z50 evaluation board  BQ40Z60EVM-578 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module BQ40Z80EVM-020 BQ40Z80 2s-7s Battery Gauge Evaluation Module BQMTESTER BQMTESTER Multi Channel Test and Program Board MKST-3P-ALT-EV2300 MKS Technology alternative for EV2300 communications transceiver
Software
Application software & framework
BQ-HI-PRODUCTION Production Application Software for Hi-Cell Count Battery Fuel (Gas) Gauges BQ27Z561-R2-DEVICE-FW BQ27Z561 firmware: impedance track battery gas gauge solution for 1-s cell li-ion battery BQEVSW BQ evaluation software (BQEVSW) v0.0.92 for BQ30Z554-R1 BQPRODUCTION Production tool for fourth generation multicell battery fuel (gas) gauges BQPRODUCTION-SINGLECELL Production Software for Single Cell Battery Fuel (Gas) Gauges BQSTUDIO Battery Management Studio (bqStudio) Software
Support software
BQ20Z60-R1_BQEVSW-SW BQ20Z60-R1 bqEASY Software BQ20Z65-R1_BQEVSW-SW BQ20Z65-R1 bqEASY Software BQ27Z746-DEVICE-FW BQ27Z746 family of gauges firmware BQ28Z610-DEVICE-FW BQ28Z610 family of gauges firmware BQ3060-BQEVSW-SW BQ3060 bqEVSW Software BQ40Z50-DEVICE-FW BQ40Z50 family of gauges firmware
Software programming tool
BQKEYPACKAGER Package Key Software for Battery Fuel Gauges BQKEYPROGRAMMER Program Key Software for Battery Fuel Gauges
Firmware
BQ28Z620-DEVICE-FW BQ28Z620 family of gauges firmware BQ34Z100-DEVICE-FW BQ34Z100 family of gauges firmware
Download options
Package Pins CAD symbols, footprints & 3D models
DSBGA (YAH) 15 Ultra Librarian

Ordering & quality

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

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