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) 30000 Implementation Pack External capacity indication None Features Impedance Track™ technology, Integrated Protector, SHA-256 Authentication Operating temperature range (C) -40 to 85 Cell balancing
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) 30000 Implementation Pack External capacity indication None Features Impedance Track™ technology, Integrated Protector, SHA-256 Authentication Operating temperature range (C) -40 to 85 Cell balancing
DSBGA (YAH) 15 5 mm² 2.61 x 1.725
  • 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 6-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 6-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 11 Nov 2021
Certificate BQ27Z746EVM-047 EU RoHS Declaration of Conformity (DoC) 01 Nov 2021
User guide BQ27Z746 Impedance Track Battery Gas Gauge and Protection Solution for 1-Series 27 Oct 2021
User guide BQ27Z746 Technical Reference Manual 27 Oct 2021

Design & development

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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 (...)

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DSBGA (YAH) 15 View options

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