Home Power management Battery management ICs Battery monitors & balancers

BQ76920

ACTIVE

3 to 5-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)

Product details

Number of series cells (min) 3 Vin (max) (V) 25 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) 5 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) 3 Vin (max) (V) 25 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) 5 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 (PW) 20 41.6 mm² 6.5 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

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
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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)
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
Package Pins Download
TSSOP (PW) 20 View options

Ordering & quality

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