Integrated bipolar stepper driver with on-chip MOSFETs
The Texas Instruments DRV8811PWPR is a fully integrated bipolar stepper motor driver that combines the control logic and power stage in a single 28-HTSSOP package. It drives one bipolar stepper motor with four half-bridge outputs built from internal Power MOSFETs — no external FETs needed. The part handles motor supply voltages from 8 V to 38 V and delivers up to 1.9 A continuous output current, making it a fit for a wide range of general-purpose motion control applications such as printers, office automation, textile machinery, and small CNC stages.
Microstepping resolution and interface
The DRV8811PWPR supports full-step, half-step, quarter-step, and eighth-step microstepping, selected via logic inputs. Microstepping reduces low-speed vibration and improves positioning resolution. The control interface is simple logic-level pins — no SPI or I²C configuration, which keeps firmware overhead low but limits dynamic current adjustment. For designs that need adaptive current control or advanced decay modes, a serial-interface driver would be the next tier up.
Package and thermal considerations
The 28-PowerTSSOP (HTSSOP) package has an exposed thermal pad on the bottom (the 28-HTSSOP supplier package variant). That pad must be soldered to a copper plane on the PCB to dissipate heat from the output stage.
Lifecycle and sourcing
The DRV8811PWPR is an active, in-production part from Texas Instruments, ROHS3 compliant. No last-time-buy or obsolescence notice is in effect. The part is available through independent distribution and is sourced to order against an RFQ.