The DRV8874 is an integrated motor driver with N-channel H-bridge, charge
pump, current sensing and proportional output,
current regulation, and protection circuitry. The charge pump improves efficiency by
supporting N-channel MOSFET half bridges and 100% duty cycle driving. The family of devices come in
pin-to-pin RDS(on) variants to support different loads with minimal design
An internal current mirror architecture on the
IPROPI pin implements current sensing and regulation. This eliminates the need for a large power
shunt resistor, saving board area and reducing system cost. The IPROPI current-sense output allows
a microcontroller to detect motor stall or changes in load conditions. Using the external voltage
reference pin, VREF, these devices can regulate the motor current during start-up and high-load
events without interaction from a microcontroller.
A low-power sleep mode achieves ultra-low quiescent current draw by shutting down most of
the internal circuitry. Internal protection features include supply undervoltage lockout, charge
pump undervoltage, output overcurrent, and device overtemperature. Fault conditions are indicated
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drivers on ti.com.