50-V, 4.1-A H-bridge motor driver with integrated current regulation & current-sense feedback

The DRV8251A device is an integrated motor driver with N-channel H-bridge,

charge pump, current sense

feedback, current regulation, and protection circuitry. The charge pump

improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle

driving.

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. The external voltage reference pin, VREF,

determines the threshold of current regulation during start-up and stall 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, output

overcurrent, and device overtemperature.

The DRV8251A is part of a family of devices which come in pin-to-pin, scalable

RDS(on) and supply voltage options to support various loads and

supply rails with minimal design changes. See Section 5 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.