STK672-640A-E

Overview

The STK672-640A-E is a hybrid integrated circuit designed as a unipolar, two-phase stepper motor driver featuring PWM current control. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum collector-emitter voltage of 45 V with a peak IGBT collector current of 1.7 A. The component utilizes a SIP package with 15 pins, measuring 46.6 mm in length, 8.5 mm in width, and 25.5 mm in height. It functions at a typical switching frequency of 47 kHz and withstands operating temperatures up to +150 °C.

Feature Summary

• Integrates built-in motor terminal open detection functionality that automatically turns off output current upon fault detection.

Applications

• Office photocopiers
• Printers

Procurement Notes

Verify the specific suffix against official onsemi documentation to confirm pinout compatibility and thermal characteristics. Ensure the procurement channel provides valid traceability for this hybrid IC series. Confirm that the delivered units match the exact part number designation without unauthorized modifications or generic substitutions.

Selection Notes

Select this component for applications requiring precise unipolar stepper motor control with integrated protection features. The high operating temperature rating and compact SIP form factor make it suitable for space-constrained office automation equipment where reliable PWM current regulation is essential for smooth motor operation.

Part Context

This device belongs to the STK672 series of hybrid stepper motor drivers from onsemi. The series is engineered for office automation machinery, providing robust drive capabilities in a single in-line package. It combines power output stages with control logic to simplify system design for two-phase stepper motors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts before considering alternative models from other manufacturers.

FAQ

What is the primary function of the built-in detection feature?

The device includes a motor terminal open detection function that automatically turns off the output current if an open circuit is detected at the motor terminals.

What type of current control does the STK672-640A-E utilize?

It utilizes Pulse Width Modulation (PWM) current control to regulate the stepper motor phases effectively.