Pololu G2 High-Power Motor Driver 18v25

This discrete MOSFET H-bridge motor driver enables bidirectional control of one high-power DC brushed motor. The small 1.3″ × 0.8″ board supports a wide 6.5 V to 30 V voltage range and is efficient enough to deliver a continuous 25 A without a heat sink. Additional features of this second-generation (G2) driver include reverse-voltage protection along with basic current sensing and current limiting functionality.

The versatility of this driver makes it suitable for a large range of currents and voltages: it can deliver up to 25 A of continuous current with a board size of only 1.3″ × 0.8″ and no required heat sink. The module offers a simple interface that requires as few as two I/O lines while still allowing for your choice of sign-magnitude or locked-antiphase operation. A current sense output gives an indicator of motor current, and the driver can limit the motor current to a configurable threshold. The power supply inputs feature reverse-voltage protection, while integrated detection of various fault conditions helps protect against other common causes of catastrophic failure; however, please note that the board does not include over-temperature protection.

The G2 High-Power Motor Driver 18v25 is a second-generation successor to our original High-Power Motor Driver 18v25. The G2 driver is much smaller than the original, but its interface and output capabilities make it a near drop-in replacement in typical applications. See “Differences from original high-power motor drivers” below for more details.

This version can be distinguished from the 24v21 by the number 150 on top of the tall silver electrolytic capacitors.

Features

• Operating voltage: 6.5 V to 30 V (absolute maximum)
• Output current: 25 A continuous
• Inputs compatible with 1.8 V, 3.3 V, and 5 V logic
• PWM operation up to 100 kHz
• Current sense output proportional to motor current (approx. 10 mV/A; only active while H-bridge is driving)
• Active current limiting (chopping) with default threshold of 60 A (can be adjusted lower)
• Reverse-voltage protection
• Undervoltage shutdown
• Short circuit protection

Dimensions

General specifications