Automotive, current sensing 40V, 10A H-bridge motor driver with integrated current feedback

The DRV8873-Q1 device is an integrated driver IC for

driving a brushed DC motor in automotive applications. Two logic inputs

control the H-bridge driver, which consists of four N-channel MOSFETs that drive

motors bi-directionally 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 simple

interfacing to controller circuits. Alternatively, independent half-bridge control

is available to drive two solenoid loads.

Integrated current sensing provides an

output current proportional to the motor load current of both hide-side FETs without

the need for high-power sense resistors. This can be used to detect motor stall or

change in load conditions.

A low-power sleep mode is provided to

achieve very-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.