Product details

Number of series cells (Min) 3 Vin (Max) (V) 25 Features Digital output, Low-side driver, Overcurrent in discharging protection, Short-current detection Number of series cells (Max) 5 Rating Catalog
Number of series cells (Min) 3 Vin (Max) (V) 25 Features Digital output, Low-side driver, Overcurrent in discharging protection, Short-current detection Number of series cells (Max) 5 Rating Catalog
TSSOP (PW) 20 29 mm² 6.5 x 4.4
  • 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
  • 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

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 Li-ion, Li-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.

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 Li-ion, Li-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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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. I) PDF | HTML 14 Mar 2022
User guide bq76920, bq76930, bq76940 AFE FAQ (Rev. A) PDF | HTML 01 Oct 2021
Technical article Protector, monitor or gauge – selecting the correct battery electronics for your Li-ion-powered system 13 Jun 2019
Application note BQ769x0 Pin Equivalent Diagrams (Rev. A) 03 Apr 2019
EVM User's guide bq76920 Evaluation Module User's Guide (Rev. D) 12 Nov 2018
Application note UART-Based Communication Protocol for Intermodule Communication of Light Vehicle 17 May 2017
Application note bq769x0 BMS Configurations for Cordless Appliances 23 Mar 2017
Application note Fault Monitoring for High-Availability Systems using the bq769x0 03 Feb 2017
Technical article How active and passive cell balancing works 05 Oct 2016
Application note Embedded Scheduler in Cell Battery Monitor of the bq769x0 10 Aug 2016
Application note bq769x0 Family Top 10 Design Considerations (Rev. A) PDF | HTML 02 May 2016
Technical article Big batteries? Take a walk on the (high) side 01 Feb 2016
Application note bq769x0 boot switch alternatives 21 Dec 2015
Technical article When it comes to batteries, not even the sky’s the limit 15 Aug 2015
Application note I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B) 14 May 2014

Design & development

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

Evaluation board

BQ76920EVM — BQ76920 evaluation board with BQ78350 

The bq76920EVM is a populated circuit board for evaluation of the bq7692000 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 3 to 5-series Lithium Ion, Lithium iron phosphate, and more battery (...)

User guide: PDF
Not available on TI.com
Firmware

bq769x0 I2C Sample Code With CRC

SLUC583.ZIP (12 KB)
Package Pins Download
TSSOP (PW) 20 View options

Ordering & quality

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