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BQ76972

ACTIVE

3s-to-16s high-accuracy battery monitor and protector for Li-ion, Li-poly and LiFePO4

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Data sheet

BQ76972

ACTIVE
Data sheet Order now

Product details

Rating Catalog Number of series cells (max) 16 Number of series cells (min) 3 Features Autonomous Mode, Coulomb Counter, Digital output, High-side FET drive, I2C support, LDO output, Low-Power Sleep Mode, Multi-cell support, One-Time Programmable (OTP) memory, Open wire (OW), Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Power-save mode, Scratchpad memory, Short-current detection, Sleep Mode, Temperature sensing, Undertemperature protection, Undervoltage protection Vin (max) (V) 80 Communication interface HDQ, I2C, SPI Device type Cell monitor and balancer, Protector Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 1.012 Battery overvoltage protection (max) (V) 5.566
Rating Catalog Number of series cells (max) 16 Number of series cells (min) 3 Features Autonomous Mode, Coulomb Counter, Digital output, High-side FET drive, I2C support, LDO output, Low-Power Sleep Mode, Multi-cell support, One-Time Programmable (OTP) memory, Open wire (OW), Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Power-save mode, Scratchpad memory, Short-current detection, Sleep Mode, Temperature sensing, Undertemperature protection, Undervoltage protection Vin (max) (V) 80 Communication interface HDQ, I2C, SPI Device type Cell monitor and balancer, Protector Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 1.012 Battery overvoltage protection (max) (V) 5.566
TQFP (PFB) 48 81 mm² 9 x 9
  • Battery monitoring capability for 3-series to 16-series cells
  • High accuracy cell voltage measurement of ±3.0 mV
  • 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)
  • 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 I 2C, 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 16-series cells
  • High accuracy cell voltage measurement of ±3.0 mV
  • 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)
  • 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 I 2C, SPI, and HDQ one-wire interface
  • Dual-programmable LDOs for external system usage
  • 48-pin TQFP package (PFB)

The Texas Instruments BQ76972 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO 4 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 I 2C, SPI, and HDQ one-wire standards. The BQ76972 device is available in a 48-pin TQFP package.

The Texas Instruments BQ76972 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO 4 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 I 2C, SPI, and HDQ one-wire standards. The BQ76972 device is available in a 48-pin TQFP package.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet BQ76972 3-Series to 16-Series High Accuracy Battery Monitor and Protector for Li-Ion, Li-Polymer, and LiFePO4Battery Packs datasheet PDF | HTML 23 Nov 2023
Application note Why is short-circuit protection more challenging for high- side driver battery packs than low-side driver? PDF | HTML 23 Jan 2026
Application note Enhance Temperature Measurement Performance With BQ769x2 and TMP6x for Battery Management System PDF | HTML 14 Nov 2025
Application note Design Considerations of Current Sensing With BQ769x2 Family for Battery Management System (Rev. A) PDF | HTML 01 Aug 2025
Application note BQ769x2 Frequently Asked Questions PDF | HTML 29 Mar 2024
Technical article 3 major design challenges to solve in battery energy storage systems PDF | HTML 30 Jan 2024
Application brief Scaling accurate battery management designs across energy storage systems PDF | HTML 20 Oct 2023
User guide BQ76972 Technical Reference Manual PDF | HTML 26 Jun 2023
Application note Design Considerations of Stacked BQ769x2 With High-Side N-MOSFET PDF | HTML 09 Feb 2023
Technical article Pack a punch in battery pack systems with low-cost MCUs PDF | HTML 16 Nov 2021
Application note Pin Equivalent Diagrams for the BQ76952, BQ76942, and BQ769142 06 May 2021
Application note BQ76952 High Voltage Stress Report PDF | HTML 25 Feb 2021
Technical article How to stack battery monitors for high-cell-count industrial applications PDF | HTML 11 Feb 2021
Application note BQ76942 IEC ESD 61000-4-2 ESD Test Report 16 Nov 2020
Technical article CURRENTly questioning the accuracy of your battery monitor? Improve battery safety PDF | HTML 28 May 2020
Technical article Improving voltage measurement accuracy in battery monitoring systems PDF | HTML 01 Apr 2020
Technical article Improving temperature measurement accuracy in battery monitoring systems PDF | HTML 20 Feb 2020
Application note Parallel Paths with the BQ769x2 Battery Monitor 09 Jan 2020
Technical article Next-generation battery monitors: how to improve battery safety while improving ac PDF | HTML 06 Jan 2020

Design & development

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

Application software & framework

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

The BQ769x2 family of battery monitors can support multiple external thermistors. The device includes an internal pullup resistor to bias the thermistor during measurement. The internal pullup resistor has two options which can set the pullup to 18 kΩ or 180 kΩ. The 18-kΩ option (...)
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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 (...)

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Supported products & hardware
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Reference designs

TIDA-010247 — High-accuracy battery management unit reference design for 48–1500V energy storage system

This reference design is a high-side, N-channel MOSFET control (up to 32s) battery management unit (BMU), using the stacked BQ769x2 battery monitor family. This design also integrates a CAN interface for BMU stacking high-voltage (up to 1500V) energy storage station applications. High-side, (...)
Design guide: PDF
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TQFP (PFB) 48 Ultra Librarian
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