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February 2013 Doc ID 024099 Rev 1 1/5
5
STEVAL-IHM043V1
6-step BLDC sensorless driver board based on the STM32F051
and L6234
Data brief
Features
■ Input voltage range: 7 to 42 V
dc
■
Output current: 2 A (5 A peak)
■ Can operate up to 100% duty cycle
■ RoHS compliant
Description
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 V
DC
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.
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