홈 배터리 관리 IC 배터리 모니터 및 밸런서
홈
배터리 관리 IC
배터리 모니터 및 밸런서

BQ78702B

활성

ASIL-B를 준수하는 밸런서 및 통합 보호기를 갖춘 18S 적층형 배터리 모니터

지금 주문하기
데이터 시트

BQ78702B

활성
데이터 시트 지금 주문하기

제품 상세 정보

Rating Catalog Number of series cells (max) 18 Number of series cells (min) 9 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 Vin (max) (V) 90 Communication interface Daisy Chain, Daisy chain, I2C controller, SPI controller, UART Operating temperature range (°C) -40 to 125 Battery overvoltage protection (min) (V) 2.7 Battery overvoltage protection (max) (V) 5.1 TI functional safety category Functional Safety-Compliant
Rating Catalog Number of series cells (max) 18 Number of series cells (min) 9 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 Vin (max) (V) 90 Communication interface Daisy Chain, Daisy chain, I2C controller, SPI controller, UART Operating temperature range (°C) -40 to 125 Battery overvoltage protection (min) (V) 2.7 Battery overvoltage protection (max) (V) 5.1 TI functional safety category Functional Safety-Compliant
HTQFP (PAP) 64 144 mm² (12 mm × 12 mm)
  • Device qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C1
  • Functional Safety-Compliant
    • Documentation to aid ISO 26262 and IEC 61508 system design
    • Systematic capability up to ASIL B and SIL2
    • Hardware intergity up to ASIL B and SIL 2
  • Measure 9 to 18 batteries in series per device, stackable up to 64 devices
  • Dedicated ADC with ±3.0mV accuracy for 1-5V input (-40°C to +125°C)
  • 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
  • Device qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C1
  • Functional Safety-Compliant
    • Documentation to aid ISO 26262 and IEC 61508 system design
    • Systematic capability up to ASIL B and SIL2
    • Hardware intergity up to ASIL B and SIL 2
  • Measure 9 to 18 batteries in series per device, stackable up to 64 devices
  • Dedicated ADC with ±3.0mV accuracy for 1-5V input (-40°C to +125°C)
  • 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 BQ78702B provides high-accuracy cell voltage measurements for up to 18S battery modules in high-voltage battery management systems in energy storage systems. 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 system architectures.

The BQ78702B provides high-accuracy cell voltage measurements for up to 18S battery modules in high-voltage battery management systems in energy storage systems. 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 system architectures.
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* 데이터 시트 BQ78702B Functional Safety-Compliant Automotive 18S Battery Monitor datasheet PDF | HTML 2025. 6. 23

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