20A 6V-30V Single-Channel DC Motor Driver

The MD20A enables bidirectional control of one high-power brushed DC motor from 6V to 30V. With a discrete NMOS H-Bridge design, this motor driver is able to support 20A continuously without any heatsink.

The onboard test buttons and motor output LEDs allow a functional test of the motor driver in a quick and convenient way without hooking up the host controller. This motor driver can be controlled with PWM and DIR inputs. With input logic voltage range from 1.8V to 12V, it’s compatible with a wide variety of host controllers (e.g. Arduino, Raspberry Pi etc).

Various protection features are also incorporated in the MD20A. Overcurrent protection prevents the motor driver from damage when the motor stalls or an oversized motor is hooked up. When the motor is trying to draw current more than what the motor driver can support, the motor current will be limited at the maximum threshold.

Assisted by temperature protection, the maximum current limiting threshold is determined by the board temperature. The higher the board temperature, the lower the current limiting threshold. This way, the MD20A is able to deliver its full potential depending on the actual condition without damaging the MOSFETs.

We also have a dual-channel option available for running two motors.

Note: Power input does not have reverse-voltage protection. Connecting the battery in reverse polarity will damage the motor driver instantaneously.

Features

• Bidirectional control for one brushed DC motor
• Operating Voltage: DC 6V to 30V
• Maximum Motor Current: 20A continuous, 60A peak
• Buttons for quick testing
• LEDs for motor output state
• PWM and DIR inputs
• Inputs compatible with 1.8V, 3.3V, 5V and 12V logic (Arduino, Raspberry Pi, PLC, etc)
• PWM frequency up to 20kHz (Output frequency is same as input frequency)
• Compatible with sign-magnitude and locked-antiphase PWM operation
• Overcurrent protection with active current limiting
• Temperature protection
• Undervoltage shutdown
• Power input does not have reverse-voltage protection

Package Contents

• 1 x 20A Single-channel 6V-30V DC Motor Driver
• 4 x PCB Spacer

Resources

• Datasheet
• Sample Code
• MD20A CAD file