IRLR8743 High Power Motor Driver - 25A

The high-power motor driver is a discrete MOSFET H-bridge designed to drive large DC brushed motors. The H-bridge is made up of one N-channel MOSFET per leg, and most of the board’s performance is determined by these MOSFETs (the rest of the board contains the circuitry to take user inputs and control the MOSFETs). The MOSFET datasheet is available under the “Resources” tab. The MOSFETs have an absolute maximum voltage rating of 30 V; higher voltages can permanently destroy the motor driver. Under normal operating conditions, ripple voltage on the supply line can raise the maximum voltage to more than the average or intended voltage, so a safe maximum voltage is approximately 24 V.

Features:

• 5.5-30V operating voltage
• 25A continuous current
• 0.066V/A current sense
• 40kHz PWM frequency
• 5.5V logic voltage
• 3.1 mΩ MOSFET on-resistance (max per leg)

Documents:

• Datasheet
• Arduino Demo Code