NXP Semiconductors ASIL D Battery Junction Box monitor IC

The new NXP MC33777 is revolutionizing Battery Pack Monitoring Technology for Electric Vehicles. It is the world’s first battery junction box integrated circuit (IC) to integrate sense, think and act capabilities on a single device. Compared to previous generations, it redefines battery management systems with its unparalleled performance and safety for high-voltage applications.

Key features

• Four current measurement channels (supporting two ASIL D current measurements)
• Per channel, one precise measurement branch and one fast measurement branch
• Shunt temperature drift compensation based on external temperature sensor
• Overcurrent detection (threshold, di/dt calculation, melting fuse emulation)
• 16 analog inputs supporting redundant measurements.
• Decision Engine Event Manager
• Configurable decision engine to assess measurement inputs and trigger reactions
• Set of event signals (ex: high di/dt, overcurrent, overvoltage, overtemperature...)
• Triggering reactions (ex: Pyrotechnic Switch controller, MCU wake-up, GPIOs...)
• Two independent controllers including driver stage
• AK-LV 16 (2012-07) compliant
• Triggering by the decision engine event manager without MCU processing
• Extensive set of diagnostics (diagnostic current, capacitor measurement, ESR measurement...)
• SPI interface and I²C interface
• MCU interface supporting SPI or TPL3

Applications

• Automotive:
  • Battery Management System (BMS)
  • Hybrid Electric Vehicle (HEV) applications
• Industrial
  • Energy Storage System (ESS)
  • EV Supply Equipment (EVSE)