The STEVAL-IHM043V1 demonstration board is a three-phase permanent magnet brushless motor driver designed to drive a motor using a sensorless 6-step commutation technique. The board can operate from a DC input voltage between 7 and 42 VDC and supply a continuous output current of 2 A to the motor. The circuit consists of three main blocks: The digital control block uses the STM32F051 microcontroller to implement the control algorithms, and generates the control signals for the power stage.The second block is the power stage, consisting of a three-phase inverter bridge implemented using the L6234 three-phase motor driver IC. The power supply block uses the ST78L33 linear regulator to provide the 3.3 V logic supply for the microcontroller.Input voltage range: 7 to 42 VdcOutput current: 2 A (5 A peak)Can operate up to 100% duty cycleRoHS compliant