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BQ78706

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Industrial 14-s stackable battery monitor, balancer and integrated protector compliant to ASIL-B

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Data sheet

BQ78706

ACTIVE
Data sheet Order now

Product details

Number of series cells (min) 9 Vin (max) (V) 70 Features Cell balancing, High precision, I2C support, Integrated ADC, Multi-cell support, Open-wire detection, Overtemperature protection, Overvoltage protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Undertemperature protection, Undervoltage protection Number of series cells (max) 14 Operating temperature range (°C) -40 to 125 Rating Catalog Battery overvoltage protection (min) (V) 2.7 Battery overvoltage protection (max) (V) 5.1 TI functional safety category Functional Safety-Compliant Communication interface Daisy Chain, Daisy chain, I2C controller, SPI controller, UART
Number of series cells (min) 9 Vin (max) (V) 70 Features Cell balancing, High precision, I2C support, Integrated ADC, Multi-cell support, Open-wire detection, Overtemperature protection, Overvoltage protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Undertemperature protection, Undervoltage protection Number of series cells (max) 14 Operating temperature range (°C) -40 to 125 Rating Catalog Battery overvoltage protection (min) (V) 2.7 Battery overvoltage protection (max) (V) 5.1 TI functional safety category Functional Safety-Compliant Communication interface Daisy Chain, Daisy chain, I2C controller, SPI controller, UART
HTQFP (PAP) 64 144 mm² 12 x 12
  • Functional Safety-Compliant
    • Documentation to aid ISO 26262 system design
    • Systematic capability up to ASIL B
    • Hardware capability up to ASIL B
  • Measure 9 to 14 batteries in series per device, stackable up to 64 devices
  • Dedicated ADC with ±3.2mV accuracy over temperature
  • Cell voltage and battery pack current measurement synchronized to 64µs
  • Support limp mode with full redundancy
  • Integrated post-ADC configurable digital low-pass filters
  • Supports busbar without affecting measurement accuracy
  • 12 GPIOs for temp sensor/analog/digital/I2C controller/SPI controller
  • Internal cell balancing
    • Balancing at 300mA
    • User controlled PWM adjustment cell balancing current
    • Built-in balancing thermal management with automatic pause and resume control
  • Robust daisy chain communication and support Ring Architecture
  • Hardware reset by host simulates POR-like event without battery removal
  • Support transformer and capacitive isolation
  • On chip memory for one time custom programming
  • Low power mode current <6µA
  • Compatible with BQ79600-Q1 with SPI/UART interface
  • Functional Safety-Compliant
    • Documentation to aid ISO 26262 system design
    • Systematic capability up to ASIL B
    • Hardware capability up to ASIL B
  • Measure 9 to 14 batteries in series per device, stackable up to 64 devices
  • Dedicated ADC with ±3.2mV accuracy over temperature
  • Cell voltage and battery pack current measurement synchronized to 64µs
  • Support limp mode with full redundancy
  • Integrated post-ADC configurable digital low-pass filters
  • Supports busbar without affecting measurement accuracy
  • 12 GPIOs for temp sensor/analog/digital/I2C controller/SPI controller
  • Internal cell balancing
    • Balancing at 300mA
    • User controlled PWM adjustment cell balancing current
    • Built-in balancing thermal management with automatic pause and resume control
  • Robust daisy chain communication and support Ring Architecture
  • Hardware reset by host simulates POR-like event without battery removal
  • Support transformer and capacitive isolation
  • On chip memory for one time custom programming
  • Low power mode current <6µA
  • Compatible with BQ79600-Q1 with SPI/UART interface

The BQ78706 provides high-accuracy cell voltage measurements for up to 14S battery modules in high-voltage battery management systems in energy storage systems (ESS) and portable power stations (PPS). This device has a state-of-the-art ADC architecture/measurement system meeting stringent safety requirements. With the daisy-chain isolated by transformer (or capacitor), the device is designed for centralized or distributed architectures in residential, commercial, or grid-scale energy storage systems.

The BQ78706 provides high-accuracy cell voltage measurements for up to 14S battery modules in high-voltage battery management systems in energy storage systems (ESS) and portable power stations (PPS). This device has a state-of-the-art ADC architecture/measurement system meeting stringent safety requirements. With the daisy-chain isolated by transformer (or capacitor), the device is designed for centralized or distributed architectures in residential, commercial, or grid-scale energy storage systems.
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* Data sheet BQ78706 Functional Safety-Compliant 14S Battery Monitor datasheet PDF | HTML 16 Oct 2024

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BQ78706 — Industrial 14-s stackable battery monitor, balancer and integrated protector compliant to ASIL-B
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