BQ79616-Q1

• Qualified for automotive applications
• AEC-Q100 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 C4B
• Functional Safety-Compliant
  • Developed for functional safety applications
  • Documentation to aid ISO 26262 system design
  • Systematic capability up to ASIL D
  • Hardware capability up to ASIL D
• +/- 1.5mV ADC accuracy
• Pin-package and software compatible device family:
  • Stackable monitor 16S (BQ79616-Q1), 14S (BQ79614-Q1), and 12S (BQ79612-Q1)
  • Standalone monitor 48 V system (BQ75614-Q1)
• Built-in redundancy path for voltage and temperature diagnostics
• Highly accurate cell voltage measurements within 128 µs for all cell channels
• Integrated post-ADC configurable digital low-pass filters
• Supports bus bar connection and measurement
• Built-in host-controlled hardware reset to emulate POR-like device reset
• Supports internal cell balancing
  • Balancing current at 240 mA
  • Built-in balancing thermal management with automatic pause and resume control
• Isolated differential daisy chain communication with optional ring architecture
• Embedded fault signal and heartbeat through communication line
• UART/SPI host interface/communication bridge device BQ79600-Q1
• Built-in SPI master

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BQ79612-Q1, BQ79614-Q1 and BQ79616-Q1 provide high-accuracy cell voltage measurements in less than 200 µs for 12S, 14S and 16S battery modules in high-voltage battery management systems in HEV/EV. The family of monitors offers different channel options in the same package type, providing pin-to-pin compatibility and supporting high reuse of the established software and hardware across any platform. The integrated front-end filters enable the system to implement with simple, low voltage rating, differential RC filters on the cell input channels. The integrated, post-ADC, low-pass filters enable filtered, DC-like, voltage measurements for better state of charge (SOC) calculation. This device supports autonomous internal cell balancing with temperature monitoring to auto-pause and resume balancing to avoid an overtemperature condition.