STEVAL-IHM043V1 STMicroelectronics

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 and supply a continuous DC 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 1/5 For further information contact your local STMicroelectronics sales office. www.st.com 55 6H ,1 ,1 *1 8 & & X) & & QV & 5 9V 9 Schematic diagram STEVAL-IHM043V1 1 Schematic diagram Figure 1. 6-Step BLDC driver section 3 *1 & X ) 9 X) 5 . Q) H EX VVH & )X *1 73 3 6 6 6 0 0 0 5 . 73 5 . LIE 5 . 73 2KP 73 / 3 9V * Q G *1 2X 2X 2X * Q G EHPID EHPIE FEHPI W W W E RR W 9 QVH IH G 6HQVH 3 ,1 (1 ,1 (1 ,1 (1 * 1 Q) ,1 % & (1 (1% (1& 9 X ) 2/5 Doc ID 024099 Rev 1 1 1 1 60 1 60 1 9& *Q 9U 9V 9V