KEA128-3-Phase Sensorless BLDC

Engineered for motor control using a six-step commutation process


KEA128BLDC reference design


6-step communication BLDC motor control algorithm concept.

Technical and Functional Specifications


  • MCU with low-power Arm Cortex-M0+ core and 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 3 high side FET pre-driver ans 3 low side FET pre-drivers. Both 5.0 and 3.0 logic level inputs are accepted.


  • Advanced power management unit for the MCU and 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 & 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
    • $299.00
    • Buy Direct
    • Distributor

Design Resources

Start developing your 3-phase sensorless BLDC motor control using a KEA128 MCU, MC33903D SBC and a MC33937 FET

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A Quick Guide for start using the KEA128 Reference Design

BLDC Motor Control Reference Design using KEA128

A Step-by-step instruction guide will help you start and control the application using FreeMaster

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