DRV8873 H-Bridge Motor Driver

Texas Instruments' DRV8873 device is an integrated driver IC for driving a brushed DC motor in industrial applications. Two logic inputs control the H-bridge driver consisting of four N-channel MOSFETs that drive motors bidirectionally with up to 10 A peak current. The device operates from a single power supply and supports a wide input supply range from 4.5 V to 38 V.

A PH/EN or PWM interface allows for simple interfacing to controller circuits. Alternatively, independent half-bridge control is available to drive two solenoid loads. A current mirror allows the controller to monitor the load current. The mirror approximates the current through the high-side FETs and does not require a high-power resistor for sensing the current.

A low-power sleep mode is provided to achieve an ultra-low quiescent current draw by shutting down much of the internal circuitry. Internal protection functions are provided for undervoltage lockout, charge pump faults, overcurrent protection, short-circuit protection, open-load detection, and overtemperature. Fault conditions are indicated on an nFAULT pin and through the SPI registers.