Product details

Number of series cells (Min) 3 Vin (Max) (V) 55 Features Digital output, High-side driver, I2C support, Integrated ADC, Multi-cell support, Open-wire detection, Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Programmable EEPROM or EPROM, Short-current detection, Temperature sensing, Undertemperature protection, Undervoltage protection Number of series cells (Max) 10 Rating Catalog
Number of series cells (Min) 3 Vin (Max) (V) 55 Features Digital output, High-side driver, I2C support, Integrated ADC, Multi-cell support, Open-wire detection, Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Programmable EEPROM or EPROM, Short-current detection, Temperature sensing, Undertemperature protection, Undervoltage protection Number of series cells (Max) 10 Rating Catalog
TQFP (PFB) 48 81 mm² 9 x 9
  • Battery monitoring capability for 3-series to 10-series cells
  • Integrated charge pump for high-side NFET protection with optional autonomous recovery
  • Extensive protection suite including voltage, temperature, current, and internal diagnostics
  • Two independent ADCs
    • Support for simultaneous current and voltage sampling
    • High-accuracy coulomb counter with input offset error < 1 µV (typical)
    • High-accuracy cell voltage measurement < 10  mV (typical)
  • Wide-range current applications (±200-mV measurement range across sense resistor)
  • Integrated secondary chemical fuse drive protection
  • Autonomous or host-controlled cell balancing
  • Multiple power modes (typical battery pack operating range conditions)
    • NORMAL mode: 286 µA
    • Multiple SLEEP mode options: 24 µA to 41 µA
    • Multiple DEEPSLEEP mode options: 9 µA to 10 µA
    • SHUTDOWN Mode: 1 µA
  • High-voltage tolerance of 85 V on cell connect and select additional pins
  • Tolerant of random cell attach sequence on production line
  • Support for temperature sensing using internal sensor and up to nine external thermistors
  • Integrated one-time-programmable (OTP) memory programmable by customers on production line
  • Communication options include 400-kHz I2C, SPI, and HDQ one-wire interface
  • Dual programmable LDOs for external system usage
  • 48-pin TQFP package (PFB)
  • Battery monitoring capability for 3-series to 10-series cells
  • Integrated charge pump for high-side NFET protection with optional autonomous recovery
  • Extensive protection suite including voltage, temperature, current, and internal diagnostics
  • Two independent ADCs
    • Support for simultaneous current and voltage sampling
    • High-accuracy coulomb counter with input offset error < 1 µV (typical)
    • High-accuracy cell voltage measurement < 10  mV (typical)
  • Wide-range current applications (±200-mV measurement range across sense resistor)
  • Integrated secondary chemical fuse drive protection
  • Autonomous or host-controlled cell balancing
  • Multiple power modes (typical battery pack operating range conditions)
    • NORMAL mode: 286 µA
    • Multiple SLEEP mode options: 24 µA to 41 µA
    • Multiple DEEPSLEEP mode options: 9 µA to 10 µA
    • SHUTDOWN Mode: 1 µA
  • High-voltage tolerance of 85 V on cell connect and select additional pins
  • Tolerant of random cell attach sequence on production line
  • Support for temperature sensing using internal sensor and up to nine external thermistors
  • Integrated one-time-programmable (OTP) memory programmable by customers on production line
  • Communication options include 400-kHz I2C, SPI, and HDQ one-wire interface
  • Dual programmable LDOs for external system usage
  • 48-pin TQFP package (PFB)

The Texas Instruments BQ76942 is a highly integrated, high accuracy battery monitor and protector for 3-series to 10-series Li-ion, Li-polymer, and LiFePO‌‌‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host-controlled cell balancing. Integration includes high-side charge-pump NFET drivers, dual programmable LDOs for external system use, and a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards. The BQ76942 is available in a 48-pin TQFP package.

The Texas Instruments BQ76942 is a highly integrated, high accuracy battery monitor and protector for 3-series to 10-series Li-ion, Li-polymer, and LiFePO‌‌‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host-controlled cell balancing. Integration includes high-side charge-pump NFET drivers, dual programmable LDOs for external system use, and a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards. The BQ76942 is available in a 48-pin TQFP package.

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Technical documentation

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Type Title Date
* Data sheet BQ76942 3-Series to 10-Series High Accuracy Battery Monitor and Protector for Li-Ion, Li- Polymer, and LiFePO4 Battery Packs datasheet (Rev. B) 02 Dec 2021
* User guide BQ76942 Technical Reference Manual (Rev. A) 17 May 2021
Application note BQ769x2 Software Development Guide (Rev. B) 26 Aug 2021
Application note BQ769x2 Calibration and OTP Programming Guide (Rev. A) 06 Aug 2021
Application note Pin Equivalent Diagrams for the BQ76952, BQ76942, and BQ769142 06 May 2021
Technical article How to stack battery monitors for high-cell-count industrial applications 11 Feb 2021
Application note Using Low-Side FETs with the BQ76952 Battery Monitor Family 19 Jan 2021
Application note BQ76942 IEC ESD 61000-4-2 ESD Test Report 16 Nov 2020
Application note Cell Balancing with BQ76952, BQ76942 Battery Monitors 01 Oct 2020
Application note Easy Configuration of BQ76942/52 Battery Monitors (Rev. A) 01 Oct 2020
Application note Multiple FETs with the BQ76952, BQ76942 Battery Monitors 21 Sep 2020
Technical article CURRENTly questioning the accuracy of your battery monitor? Improve battery safety and accuracy with these tips 28 May 2020
Technical article Improving voltage measurement accuracy in battery monitoring systems 01 Apr 2020
Technical article Improving temperature measurement accuracy in battery monitoring systems 20 Feb 2020
Application note Parallel Paths with the BQ769x2 Battery Monitor 09 Jan 2020

Design & development

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

Evaluation board

BQ76942EVM — 3-series to 10-series Li-ion, Li-polymer and LiFePO4 battery monitor and protector EVM

The BQ76942EVM evaluation module (EVM) is a complete evaluation system for the BQ76942, a 3-cell to 10-cell Li-Ion battery monitor integrated circuit. The EVM consists of a BQ76942 circuit module which is used for simple evaluation of the BQ76942 monitor function. The circuit module includes one (...)

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Application software & framework

BQSTUDIO — Battery Management Studio (bqStudio) Software

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 (...)
Calculation tool

BQ769X2-THERMISTOR_COEFF_CALCULATOR — BQ76952/42 thermistor temperature optimizer - calculate the thermistors coefficients for T range

The BQ769x2 Thermistor Temperature Optimizer will calculate the thermistor coefficients for the specific thermistor used in your application, as described in the sections “Calibration:18K Temperature Model”,  “Calibration:180K Temperature Model” and (...)
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TQFP (PFB) 48 View options

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