STK672-732A-E

Overview

The STK672-732A-E is a thick-film hybrid integrated circuit designed for unipolar, two-phase stepper motor applications. It incorporates PWM current control and built-in protection mechanisms including overcurrent detection and overheat sensing with automatic output shutdown. The device features an active-low fault signal output, power-on reset functionality, and Schmitt trigger inputs compatible with 2.5V logic levels. External resistors allow precise setting of the motor drive current.

Feature Summary

• Integrated PWM current control for efficient stepper motor driving
• Built-in overcurrent and overheat detection with automatic output cutoff
• Active-low fault signal output for system monitoring
• Power-on reset function and Schmitt input support

Applications

• Office photocopiers
• Printers
• Scanners

Procurement Notes

Verify the specific suffix 'A' against official onsemi documentation to confirm pinout and electrical characteristics match the intended design requirements. Ensure thermal management solutions align with the absolute maximum ratings specified in the datasheet. Confirm RoHS compliance status through the manufacturer's material composition declarations prior to final procurement.

Selection Notes

Select this component for designs requiring a compact, single-chip solution for unipolar stepper motors. Consider its compatibility with standard logic interfaces and the need for external current-setting resistors. Evaluate the package thermal performance relative to the expected operating environment and duty cycle to ensure reliable operation within specified temperature limits.

Part Context

This part belongs to the STK672 series of hybrid ICs from onsemi, specialized for motion control applications. These devices are engineered to simplify driver circuitry by integrating power stages and control logic into a single robust package, commonly utilized in office automation equipment where space and reliability are critical constraints.

Replacement Considerations

Check official cross-reference lists for direct replacements. Verify that any substitute maintains identical pin configuration, voltage ratings, and current capabilities to ensure mechanical and electrical interchangeability without redesigning the host PCB.