STEVAL-IHM043V1

STEVAL-IHM043V1 6-step BLDC sensorless driver board based on the STM32F051 and L6234 Data brief Features ■ Input voltage range: 7 to 42 Vdc ■ 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 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. February 2013 Doc ID 024099 Rev 1 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 *1' Doc ID 024099 Rev 1 ,1 (1 2XW ,1 2XW (1 2XW ,1 6HQVH (1 6HQVH 9V 9V 9ERRW 9UHI 9&3             ,1$ (1$ ,1% (1% ,1& (1& *QG *QG *Q G *1 '     *1'      5 2KP 8 / 3' LIE 5 . 5 .    3  73 Q) & 5  & X) *1' & X) 9   3 6-Step BLDC driver section & X) 9 5 . *1' & X) EXVVHQVH 5 . 9V Figure 1. & Q) 9V 160 ' 160 ' 160 ' 9 Schematic diagram X) EHPIF 73 1 160 160 ' & ' EHPIE EHPID  73  2/5  73 Schematic diagram STEVAL-IHM043V1 STEVAL-IHM043V1 Figure 2. Schematic diagram 6-Step BLDC driver connector section 8 670) &7 9 5 EHPID 5 EHPIE  5 '1, N 5 . 9  & X) *1' 9  0K] 1567 5   *1' 5 . LIE 9 &  Q) 5 .    73 5 .