Product details


Number of series cells (Min) 6 Vin (Max) (V) 50 Features Low-side driver, Overcurrent in discharging protection, Short-current detection Number of series cells (Max) 10 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Battery monitors & balancers

Package | Pins | Size

TSSOP (DBT) 30 34 mm² 7.8 x 4.4 open-in-new Find other Battery monitors & balancers


  • AFE monitoring features
    • Pure digital interface
    • Internal ADC measures cell voltage, die temperature, and external thermistor
    • A separate, internal ADC measures pack current (coulomb counter)
    • Directly supports up to three thermistors (103AT)

  • Hardware protection features
    • Overcurrent in Discharge (OCD)
    • Short Circuit in Discharge (SCD)
    • Overvoltage (OV)
    • Undervoltage (UV)
    • Secondary protector fault detection
  • Additional features
    • Integrated cell balancing FETs
    • Charge, discharge low-side NCH FET drivers
    • Alert interrupt to host microcontroller
    • 2.5-V or 3.3-V output voltage regulator
    • No EEPROM programming necessary
    • High supply voltage absolute maximum (up to 108 V)
    • Simple I2C compatible interface (CRC option)
    • Random cell connection tolerant
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The bq769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The bq769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.

The bq76920 device supports up to 5-series cells or typical 18-V packs, the bq76930 handles up to 10-series cells or typical 36-V packs, and the bq76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Lithium Ion, Lithium iron phosphate, and more. Through I2C, a host controller can use the bq769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.

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NEW BQ76942 ACTIVE 3-series to 10-series multicell battery monitor and protector Next generation 10s monitor with increased accuracy, protection features, high-side FET driver integrated

Technical documentation

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Type Title Date
* Data sheet bq769x0 3-series to 15-series cell battery monitor family for li-ion and phosphate applications datasheet (Rev. H) Mar. 06, 2019
Technical article Protector, monitor or gauge – selecting the correct battery electronics for your Li-ion-powered system Jun. 13, 2019
Application note BQ769x0 Pin Equivalent Diagrams (Rev. A) Apr. 03, 2019
User guide bq76930 and bq76940 Evaluation Module (Rev. C) Dec. 10, 2018
Application note UART-Based Communication Protocol for Intermodule Communication of Light Vehicle May 17, 2017
Application note bq769x0 BMS Configurations for Cordless Appliances Mar. 23, 2017
Application note Fault Monitoring for High-Availability Systems using the bq769x0 Feb. 03, 2017
Technical article How active and passive cell balancing works Oct. 05, 2016
Application note Embedded Scheduler in Cell Battery Monitor of the bq769x0 Aug. 10, 2016
Application note bq769x0 Family Top 10 Design Considerations (Rev. A) May 02, 2016
Technical article Enjoy cordless freedom, cut the cord of your AC appliance! Apr. 12, 2016
Technical article Big batteries? Take a walk on the (high) side Feb. 01, 2016
Application note bq769x0 boot switch alternatives Dec. 21, 2015
Application note I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B) May 14, 2014
User guide bq76920, bq76930, bq76940 AFE FAQ May 07, 2014

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

The bq76930EVM is a populated circuit board for evaluation of the bq76930 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 6 to 10-series Lithium Ion, Lithium iron phosphate, and more battery (...)

  • Bq7693000 AFE IC
  • Bq78350 Battery Management controller
  • FETs for current control
  • Test point patterns for easy evaluation

Software development

SLUC583.ZIP (12 KB)
SLUC539A.ZIP (2752 KB)

Reference designs

10s Battery Pack Monitoring, Balancing, and Comprehensive Protection. 50A Discharge Reference Design
TIDA-00449 This reference design is ready tested for 10 cells in series battery pack monitoring, balancing and protection for power tools. Power tools increasingly use highly power-dense Li-Ion or Li-Iron phosphate cells based battery packs that need to be protected from explosion due to incorrect charging or (...)
document-generic Schematic
Industrial Battery Management Module for 20S Applications Reference Design
TIDA-01093 — High serial cell count battery (>15s) systems are becoming more and more common for industrial applications. These applications are cost sensitive and require a simple solution that includes monitoring, protection, and control or even SOC (State of Charge) information rather than only basic (...)
document-generic Schematic

CAD/CAE symbols

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TSSOP (DBT) 30 View options

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