Introduction

A basic implementation of a half-bridge driver for hobbyest DC motors.

Features of Interest

• Isolated, Schmitt Trigger, Digital Input
• Designed for 3-phase operation of upto 2 HP
• Nominally, functional upto a few 100 kHz*
• Mild protection from cross-conduction

Summary of Critical Parts

• Isolated ADUM7234 Gate Driver
• 74HC7002 Schmitt-Trigger Input Stage
• BUK9T14-80E N-Channel MOSFET(s)
• NO Back-EMF Sensing

Nominal Operation

• (12 to 30) V Drive input
• Several Amps (Heatsinking Required)
• Expectes Proper cross-conduction prevention measures in software