The DRV8251 family of devices are integrated motor drivers with N-channel H-bridge, charge pump, current regulation, and protection circuitry. The DRV8251A additionally has current-sense feedback. The charge pump improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle driving. 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 H-bridge driver architecture supports peak currents up to 4.1A. The DRV8251A can operate from a single power supply and supports a wide input supply range of 4.5V to 48V.

The DRV8251AEVM is a 3.7A, brushed DC drive stage based on the DRV8251A H-bridge driver for BDC motors. The device includes a current shunt amplifier for low-side current measurement, 150mA LDO, dead time control pin, VDS overcurrent level pin, and gate driver shutoff pin. The EVM comes equipped with two potentiometers which allow for adjustment of the control signal duty cycle. If desired, the on-board MCU can be disconnected so the DRV8251A can be controlled by an externally. Up to 48V can be supplied to the EVM, and the DRV8251AEVM’s integrated LDO generates a 3.3V reference voltage. A status LED for the power supply is included for user feedback.