User manual

III. MDM5253 DC Motor Driver Module with Position and Current

Feedback

III.1 Introduction

The MDM5253 DC Motor Driver Module with Position and Current Feedback is a three-channel H-

bridge switching power amplifier board. It can be directly controlled by motion controller’s logic level

PWM driving signals at a frequency up to 20 KHz. For each of the three independent channels, the

MDM5253 also provides the current feedbacks and connectors for position sensors such as

potentiometers. Each channel is able to drive inductive DC load with current up to 5.0 A and operating

voltage ranging from 5.0 V to 28.0 V.

III.1.1 Features

• 3 Independent channels

• Output 5.0 V to 28.0 V operations

• Up to 5.0 A inductive DC load current capability

• 5.0 V TTL/CMOS compatible Inputs

• PWM Frequencies up to 20 kHz

• Automatic PWM over-current limiting

• Output short circuit protection

• Over-temperature output current reduction and shutdown

• Under-voltage shutdown

• Analog output current feedback

• 3 Connectors for position feedbacks

• Directly plug-on to the WiRobot PMS5005 sensing and motion controller board

III.1.2 Applications

• DC motor and stepper motor control

• Permanent magnet solenoid control

• Robotic systems

• General PWM power amplifier

III.2 Operations

III.2.1 Theory of Operation

When four switches configured as that in Figure III.1, the whole circuit is called an H-bridge. By

controlling the on/off of four switches in certain patterns, the polarity of the supply power on the

control output can be changed. For example, when Control Input 1 and 4 are ON while the Control

Input 2 and 3 are OFF, the controlled load is supplied by power with + on the left and – on the right.

When Control Input 1 and 4 are OFF while the Control Input 2 and 3 are ON, the controlled load is

supplied by power with - on the left and + on the right.

When applying the H-bridge output to a DC motor or other inductive loads with PWM controlled

switching command based on certain algorithms and the feedback signals, full bidirectional magnitude

control, including speed, position and torque control, can be achievable.