The DRV8251 device is an integrated motor driver with N-channel H-bridge, charge pump, current regulation, and protection circuitry. The charge pump improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle driving.

The DRV8251 implements a current regulation feature by comparing the analog input VREF and the voltage across a current-sense shunt resistor on the ISEN pin. The ability to limit current can significantly reduce large currents during motor startup and stall conditions.

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.

Features：

N-channel H-bridge brushed DC motor driver

4.5-V to 48-V operating supply voltage range

Pin-to-pin, RDS(on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)

DRV8870: 6.5-V to 45-V, 565-mΩ, shunt

DRV8251: 4.5-V to 48-V, 450-mΩ, shunt

DRV8251A: 4.5-V to 48-V, 450-mΩ, mirror

DRV8231: 4.5-V to 33-V, 600-mΩ, shunt

DRV8231A: 4.5-V to 33-V, 600-mΩ, mirror

High output current capability: 4.1-A Peak

PWM control interface

Supports 1.8-V, 3.3-V, and 5-V logic inputs

Integrated current regulation

Low-power sleep mode

<1-µA at VVM = 24-V, TJ = 25°C

Small package and footprint

8-Pin HSOP with PowerPAD™, 4.9 × 6.0 mm

Integrated protection features

VM undervoltage lockout (UVLO)

Latched overcurrent protection (OCP)

Thermal shutdown (TSD)