KEA128-3-Phase Sensorless BLDC

Engineered for motor control using a six-step commutation process


KEA128BLDC reference design


Six-Step Communication BLDC Motor Control Block Diagram

Technical and Functional Specifications


  • MCU with low-power Arm Cortex-M0+ core
  • 8–128 KB of embedded flash
  • Excellent EMC/ESD
  • High temperature and low radiated emissions


  • Field effect transistor (FET) pre-driver designed for three phase motor control
  • Contains three high side FET pre-drivers and three low side FET pre-drivers
  • Both 5.0 and 3.0 logic level inputs accepted


  • Advanced power management unit for the MCU
  • Additional integrated circuits such as sensors and CAN transceivers


  • Sensorless control using the back-EMF zero-crossing detection
  • Closed-loop speed control
  • Dynamic motor current limitation
  • DC-bus overvoltage, undervoltage, and overcurrent fault detection


  • LIN and CAN connectivity support


  • OpenSDA debug interface (including USB to UART bridge)


  • Application built upon the functions provided by Automotive Math and Motor Control Library Set
  • Integrated FreeMASTER run-time debugging tool for instrumentation/visualization


  • KEA128BLDCRD   Development

  • KEA128 Development Board for 3-phase sensorless BLDC
    • KEA128BLDCRD
    • 1 @ US
    • $315.00
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