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REFMOT101

Reference Design

A system-level evaluation board that combines ROHM's IC and discrete products. We have already solved not only the characteristics of individual products but also the problems that may occur when combining them to build a system, thus contributing significantly to the reduction of development time for our customers.

12V supply, 3 Hall Sensor, Three Phase Brushless DC motor drive Reference Deisgn

Summary

This design consists of a three-hole sensor three-phase brushless DC motor pre-driver and a MOSFET.
It is an evaluation board that can drive a brushless DC motor with a supply voltage of 12V (typ) and a motor current of 6A (max) by adding a speed control circuit using a microcontroller to the 3 Hall sensor 3-phase brushless DC motor drive circuit.
It requires only one external power supply. When a Hall IC is used, the logic IC can detect the direction of rotation and output a triple multiplier FG.

Features

  • 3 Hole Sensor Three Phase Brushless DC Motor Pre-Driver and Output MOS P+N Configuration
  • Supply voltage 12V(typ)
  • Output current 6A(max)
  • PWM drive with 120 degree commutation.
  • Rotation direction switching, short braking function
  • Rotation direction detection output, triple FG output possible (when Hall IC is used)
  • Speed control by MCU is possible.

Key Specification (Reference design)

Name of boardRMS332SD-011
Input voltage6.0V to 18.0V
Nb of outputs6A(Max)(depending on driving capability of MOSFET)
Output voltage3 hole sensor 120 degree commutation
EMC perfomanceInput: Control input (DC or PWM), Rotation direction switching, Short brake.
Outputs: Rotation direction detection, triple multiplier FG output, FG output.
Dimension60mm×75mm

Applications

Small Mobility Unit
Fans
Pumps

PRT62-EVK001

Reference Board Image

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Design files