L9965A-TR [STMicroelectronics]

The L9965A is an 18 channel battery cells monitoring and balancing IC.

• AEC-Q100 qualified
• Temperature grade 1: –40 °C to +125 °C operating temperature range
• HBM ESD classification level 2
• CDM ESD classification level C4B
• Full ISO26262 compliant, ASIL-D systems ready, documentation available
• Fully synchronized high accuracy measurements on cell voltage, busbar and stack voltage with dedicated ADC:
  • Total error including aging and post soldering <1.4 mV at 3.3 V, -40 °C to 105 °C
  • 16-bit resolution
  • Cell range: -1 to 5.5 V
  • Integrated digital filtering with programmable cutoff frequency from 3.3 kHz to 4.4 Hz
  • Fully redundant architecture
  • Cell and busbar support on every channel
  • Dedicated busbar channel with ±1 V range
• Passive internal cell balancing up to 400 mA, supporting time-continuous and PWM modes, with automatic cool down based on external NTC sensing. Overcurrent protection during balancing is also available in low-power mode
• Integrated DC-DC converter for energy efficiency:
  • Deep-sleep: <12 µA
  • Cyclic WAKEUP mode: <20 µA
  • Normal mode: <2 mA
• 10 configurable GPIO
• SPI controller and I2C controller peripherals for interfacing external EEPROMs and sensors
• SPI target for direct MCU interface
• Stackable architecture for high-voltage battery packs up to 59 devices
• Embedded NVM for configuration parameters storage and runtime configuration integrity check
• Ultrafast vertical interface peripheral for isolated communication
• Compatible with L9965C pack monitoring chip with a max desynchronization time of 7 µs at system level