Pololu Dual G2 High-Power Motor Driver 24v18 Shield for Arduino

This shield makes it easy to control two high-power DC motors with your Arduino or Arduino-compatible board. Its twin discrete MOSFET H-bridges support a wide 6.5 V to 40 V operating range and are efficient enough to deliver a continuous 18 A without a heat sink. The drivers offer basic current sensing and current limiting functionality, and they accept ultrasonic PWM frequencies for quieter operation. The Arduino pin mappings can all be customized if the defaults are not convenient, and the motor driver control lines are broken out along the left side of the shield for general-purpose use without an Arduino.

Key Specifications:

• Operating voltage: 6.5 V to 40 V (absolute maximum; not intended for use with 36 V batteries)
• Output current: 18 A continuous
• Current sense output proportional to motor current (approx. 20 mV/A; only active while H-bridge is driving)
• Active current limiting (chopping) with approximate default threshold of 50 A (can be adjusted lower)

General Specifications:

• Motor channels: 2
• Minimum operating voltage: 6.5 V
• Maximum operating voltage: 40 V
• Continuous output current per channel: 18 A
• Current sense: 0.020 V/A
• Maximum PWM frequency: 100 kHz
• Minimum logic voltage: 1.8 V
• Maximum logic voltage: 5 V
• Reverse voltage protection?: Y