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

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.

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




Technical Documentation

Product Specifications
Description Version Size
DB1860 DB1860: 6-step BLDC sensorless driver board based on the STM32F051 and L6234 1.0 159 KB
Application Notes
Description Version Size
AN4220 AN4220: Sensorless six-step BLDC commutation 1.3 946 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-IHM043V1 gerber files 1.0 160 KB
Bill of Materials
Description Version Size
Schematic Pack
Description Version Size
STEVAL-IHM043V1 schematics 1.0 83 KB

Publications and Collaterals

Selection Guides
Description Version Size
X-NUCLEO expansion boards motor control - Selection guide 1.0 458 KB
Description Version Size
Products and solutions for Smart industry 2.0 5 MB


License Agreement
Description Version Size
Evaluation products license agreement 1.4 128 KB

Tools and Software

Embedded Software
Evaluation Tool Software
MCUs Embedded Software
Support & Community
Related Applications

Sample & Buy

Part Number Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-IHM043V1 STM32F051; L6234 Active 63.70 1 NEC 3A991A2 ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY

(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-IHM043V1 ActiveCARDIndustrialEcopack2

(**) The Material Declaration forms available on st.com 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.