Depending on the kind of motor you design, various drive topologies exist. A DC motor with brushes requires an H-bridge for bidirectional operation and half bridge if it is being operated unidirectional. A brushless DC motor requires a 3-phase bridge, and a stepper motor requires a dual H-bridge driver. This tutorial will discuss the STMicroelectronics powerSTEP01, a stepper motor driver that integrates a dual-H Bridge topology.