Pololu Dual G2 High-Power Motor Driver 18v22 for Raspberry Pi (Partial Kit)

Description

This add-on board makes it easy to control two high-power DC motors with a Raspberry Pi. Its twin discrete MOSFET H-bridges support a wide 6.5 V to 30 V operating range and are efficient enough to deliver a continuous 22 A without a heat sink. The drivers offer basic current limiting functionality, and they accept ultrasonic PWM frequencies for quieter operation. The default pin mappings make it easy to get started, but they can be customized for more specialized applications. This version ships as a partial kit; all surface-mount components are installed, but the included through-hole connectors are not soldered in.

The board matches the Raspberry Pi HAT (Hardware Attached on Top) mechanical specification, although it does not conform to the full HAT specifications due to the lack of an ID EEPROM. (A footprint for adding your own EEPROM is available for applications where one would be useful; pull-ups on SDA, SCL, and WP are provided.) It is not practical to use this expansion board with the original Raspberry Pi Model A or Model B due to differences in their pinout and form factor.

PWM operation up to 100 kHz
Motor indicator LEDs show what the outputs are doing even when no motor is connected
Integrated 5 V, 2.5 A switching step-down voltage regulator powers the Raspberry Pi base for single-supply operation
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
Current sensing and limiting pins are exposed for advanced use
Reverse-voltage protection
Undervoltage shutdown
Short circuit protection
Operating voltage: 6.5 V to 30 V (absolute maximum; not intended for use with 24 V batteries)
Output current: 22 A continuous
Active current limiting (chopping) with approximate default threshold of 60 A (can be adjusted lower)

This is the 18v22 motor driver, which is a partial kit; connectors are included but not soldered in. It can be distinguished from the other versions by its black PCB and the number 150 on top of the six tall silver electrolytic capacitors at the corner of the board.

The following through-hole connectors and mounting hardware are included with the board, which ships with its surface-mount components populated:

one 2×20-pin 0.1? female header
three 2-pin 5 mm terminal blocks
four M2.5 standoffs (11 mm length), screws, and nuts

Pololu product page