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BQ76930

ACTIVE

6 to 10-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)

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Data sheet

BQ76930

ACTIVE
Data sheet Order now

Product details

Number of series cells (min) 6 Vin (max) (V) 50 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Device type Cell monitor and balancer Number of series cells (max) 10 Operating temperature range (°C) -40 to 85 Rating Catalog Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Communication interface I2C Operating current (typ) (µA) 40
Number of series cells (min) 6 Vin (max) (V) 50 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Device type Cell monitor and balancer Number of series cells (max) 10 Operating temperature range (°C) -40 to 85 Rating Catalog Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Communication interface I2C Operating current (typ) (µA) 40
TSSOP (DBT) 30 49.92 mm² 7.8 x 6.4
  • 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 L PDF | HTML 13 Jun 2019
Application note BQ769x0 Pin Equivalent Diagrams (Rev. A) 03 Apr 2019
User guide bq76930 and bq76940 Evaluation Module (Rev. C) 10 Dec 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
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
Application note bq769x0 boot switch alternatives 21 Dec 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

BQ76930EVM — BQ76930 evaluation board with BQ78350

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 (...)

User guide: PDF
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Firmware

SLUC583 — bq769x0 I2C Sample Code With CRC

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76920 — 3 to 5-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family) BQ76930 — 6 to 10-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family) BQ76940 — 9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)
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Support software

SLUC539 — bq76940/bq76930/bq76920 Evaluation Software

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76920 — 3 to 5-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family) BQ76930 — 6 to 10-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family) BQ76940 — 9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)
Hardware development
Evaluation board
BQ76920EVM — BQ76920 evaluation board with BQ78350  BQ76930EVM — BQ76930 evaluation board with BQ78350 BQ76940EVM — BQ76940 evaluation board with BQ78350
Download
Reference designs

TIDA-01093 — Industrial Battery Management Module for 20S Applications Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00449 — 10s Battery Pack Monitoring, Balancing, and Comprehensive Protection. 50A Discharge Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
TSSOP (DBT) 30 View options
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