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6-Step BLDC sensorless driver board based on the STM32F051 and L6234
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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 VDCand 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.

pdf Please read
Errata Sheet
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Data Brief

Key Features

  • Input voltage range: 7 to 42 Vdc
  • Output current: 2 A (5 A peak)
  • Can operate up to 100% duty cycle
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1860: 6-step BLDC sensorless driver board based on the STM32F051 and L6234
1.0 159 KB

Application Notes

Description Version Size
AN4220: Sensorless six-step BLDC commutation
1.3 946 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-IHM043V1 gerber files
1.0 161 KB

Bill of Materials

Description Version Size
1.0 10 KB

Schematic Pack

Description Version Size
STEVAL-IHM043V1 schematics
1.0 84 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STSW-STM32100 STM32 PMSM FOC Software Development Kit - MC library (UM1052)
STSW-IHM043V1 6-Step BLDC sensorless firmware based on STM32F051

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-IHM043V1ActiveSTM32F051; L6234Buy Direct63.7Distributor reported inventory date: 2016-02-11
Distributor NameRegionStockMin. order

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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