DRV8434A Stepper Drivers Texas Instruments DRV8434A Stepper Drivers are fully integrated with two N-channel power MOSFET H-bridge drivers, a micro-stepping indexer, and integrated current sensing. The DRV8434A can drive up to 2.5A full-scale output current (dependent on PCB thermal design). The DRV8434A Stepper Drivers with integrated current sense is designed for industrial and consumer applications.