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Texas Instruments DRV8426/DRV8426E/DRV8426P Stepper Motor Drivers are for industrial and consumer applications. The DRV8426E/DRV8426P devices can be used for driving two DC motors or a bipolar stepper motor. The DRV8426 devices are fully integrated, with two N-channel power MOSFET H-bridge drivers, a micro-stepping indexer, and integrated current sensing. The driver’s DRV8426E/DRV8426P output stage consists of N-channel power MOSFETs configured as two full H-bridges, charge pump regulator, current sensing and regulation, and protection circuitry. All of the devices can drive up to 1.5A full-scale output current (dependent on PCB design).
The Texas Instruments DRV8426/DRV8426E/DRV8426P uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme selectable between smart tune, fast, slow, and mixed decay options. Smart tune automatically adjusts for optimal current regulation, compensates for motor variation and aging effects, and reduces audible noise from the motor.
