The DRV8871DDAR is a fully integrated full-bridge motor driver from Texas Instruments, built with NMOS transistors and controlled via a single PWM input. It delivers 3.6 A continuous output current, enough to drive small brushed DC motors and unipolar stepper motors in industrial and automotive applications.
6.5 V to 45 V — one driver for multiple rail voltages
Both the supply voltage and the motor load voltage share the same 6.5 V to 45 V operating range. That means the same part can run from a 12 V automotive battery, a 24 V industrial rail, or a 48 V telecom supply without re-spinning the BOM. The wide margin also absorbs transients on unregulated buses.
This pad is the primary heat path; the PCB layout must include a matching copper land and thermal vias to the inner or bottom layers. Without adequate copper area, the 3.6 A output current will be thermally limited well below the electrical rating.