35-V, 3.7-A H-bridge motor driver with integrated current regulation & current-sense feedback

The DRV8231A 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 DRV8231A 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 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.