DRV8818PWP

Overview

The DRV8818PWP is a bipolar stepper motor driver from Texas Instruments, housed in a 28-pin HTSSOP package with an exposed PowerPAD for thermal management. It integrates two H-bridge drivers and a microstepping indexer supporting full, half, quarter, and eighth-step modes. The device delivers up to 2.5A per winding with a low on-resistance of 0.37Ω. It operates with a logic supply of 3V to 5.5V and a motor supply of 8V to 35V. Key features include programmable decay mode and PWM off time, along with comprehensive protection against overcurrent, short circuits, under-voltage lockout, and overtemperature.

Feature Summary

• Integrates a microstepping indexer for smooth operation across multiple resolution modes
• Features programmable mixed decay, blanking, and PWM off time for optimized performance
• Includes internal shutdown functions for robust fault protection

Applications

• Printers
• Scanners
• Textile machinery
• Factory automation systems
• Robotics

Procurement Notes

Verify the specific suffix 'PWP' indicates tube packaging, distinct from the 'PWPR' reel variant. Confirm current availability status as some sources indicate end-of-life notifications for this specific package type. Ensure compatibility with existing PCB footprints designed for the 28-pin HTSSOP form factor before finalizing procurement decisions.

Selection Notes

Select this component when designing systems requiring integrated microstepping control without external logic. It is suitable for applications needing high current density in a compact surface-mount package. Consider the thermal requirements of the PowerPAD design for sustained high-current operations. Verify that the 35V maximum voltage rating aligns with the target motor supply specifications.

Part Context

This part belongs to the DRV8818 family of stepper motor drivers. It serves as a pin-compatible upgrade option to the DRV8811, offering lower MOSFET on-resistance for improved efficiency. The device is designed to simplify controller circuit interfacing through a standard step/direction interface, reducing design complexity for automated equipment manufacturers.

Replacement Considerations

The DRV8811 is a documented pin-compatible alternative within the same family. Verify functional equivalence regarding current ratings and microstepping capabilities before substitution. Check for any updates in the latest datasheet regarding recommended replacements or obsolescence notices.