This motor driver board is an add-on for the Raspberry Pi Model B+, A+, or Pi 2 that lets it easily control a pair of bidirectional, brushed DC motors. The expansion board uses a pair of Freescale MC33926 motor drivers, which operate from 5 to 28 V and can deliver a continuous 3 A per channel (up to 5 A per channel for a few seconds). Other features include a reverse battery protection circuit and logic gates that reduce the number of I/O pins required to control the driver ICs effectively.

Features:

• Wide operating voltage range: 5 V to 28 V
• Output current: 3 A continuous (5 A peak) per motor
• PWM operation up to 20 kHz, which is ultrasonic and allows for quieter motor operation
• Motor indicator LEDs show what the outputs are doing even when no motor is connected
• Board can optionally power the Raspberry Pi base directly through added regulator (not included)
• Python library makes it easy to get started using this board as a motor driver expansion board
• GPIO pin mappings can be customized if the default mappings are not convenient
• Remaining motor driver pins are exposed for advanced use
• Reverse-voltage protection on motor supply
• Robust drivers:
  • Transient operation (< 500 ms) up to 40 V
  • Internal peak-current limiting gracefully reduces the output power if the current or temperature get too high
  • Under-voltage shutdown
  • Output short-to-ground and short-to-Vcc protection
• Prototyping space for easier/cleaner construction of custom circuits

Documents:

• MC33926 Datasheet
• Python Library