STK672-120-E

Overview

The STK672-120-E is a thick-film hybrid IC designed as a unipolar, two-phase stepping motor driver. It utilizes a fixed-current chopper scheme with self-excited PWM and incorporates a built-in phase signal distribution IC. The device features power MOSFETs in the output stage and supports both 2-phase and 1-2 phase excitation modes for precise motor control. It allows speed regulation based on external clock frequency and includes direction switching functionality.

Feature Summary

• Integrates a phase signal distribution IC to enable motor speed control via external input clock signals
• Supports dual excitation modes including 2-phase and 1-2 phase configurations
• Provides hardware-based motor direction switching capability

Applications

• Two-phase stepping motor drive systems
• Office photocopiers
• Printers

Procurement Notes

Verify the specific suffix and revision level against the manufacturer's current datasheet to ensure compatibility with existing designs. Confirm that the required output current of 2.4A aligns with the target motor specifications. Check for any updated environmental compliance certifications or packaging variations before finalizing procurement orders.

Selection Notes

Select this component when a unipolar driver with integrated phase distribution is required for two-phase stepper motors. Ensure the application can accommodate the fixed-current chopper architecture. Verify that the external clock signal requirements match the controller's output capabilities. Consider thermal management needs given the hybrid IC construction and power dissipation characteristics.

Part Context

This part belongs to the STK672 series of thick-film hybrid integrated circuits manufactured by onsemi. These devices are specialized for driving two-phase stepping motors in office automation equipment. The series typically combines power MOSFETs with control logic to provide robust motor driving solutions with built-in protection features.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.