STK672-543-E

Overview

The STK672-543-E is a hybrid integrated circuit designed as a unipolar, two-phase stepping motor driver featuring PWM current control. It supports full and half-stepping modes for precise motor positioning. The device integrates protection mechanisms including overcurrent shutdown and thermal shutdown to ensure reliable operation under varying load conditions. Designed for robust performance in industrial automation and office equipment, it simplifies the drive circuitry required for bipolar or unipolar stepper motors by providing all necessary power switching and logic interfaces in a single package.

Feature Summary

• Integrates PWM current control for efficient motor speed regulation
• Includes built-in overcurrent and thermal protection circuits
• Supports both full-step and half-step driving modes

Applications

• Industrial automation machinery
• Office automation equipment such as printers and copiers
• Precision positioning systems requiring unipolar stepper control

Procurement Notes

Verify the specific suffix 'E' against the manufacturer's latest datasheet to confirm compliance with RoHS directives and lead-free manufacturing standards. Ensure the ordering part number matches the exact pinout and voltage ratings required for your target application circuit design.

Selection Notes

Select this component when a monolithic solution for unipolar stepper motors is required to reduce board space and design complexity. It is suitable for applications needing integrated thermal and current protection without external discrete components. Verify that the supply voltage and current requirements align with the IC's specified operating limits.

Part Context

This part belongs to the STK672 series of hybrid motor driver ICs originally developed by Sanyo Semiconductor, now part of onsemi. These devices are widely used in legacy and modern electromechanical systems where reliable, cost-effective stepper motor control is essential. The series is known for its high integration level and robustness in noisy electrical environments.

Replacement Considerations

Check for direct cross-reference part numbers from onsemi or other manufacturers offering compatible pinouts and electrical characteristics. Ensure any substitute supports the same unipolar configuration and voltage ratings.