STK672-642AN-E

Overview

The STK672-642AN-E is a thick-film hybrid integrated circuit designed as a unipolar, two-phase stepper motor driver with PWM current control. It utilizes power MOSFETs in the output stage to drive stepper motors efficiently. The device incorporates built-in protection mechanisms including overcurrent detection and overheat detection, which automatically turn off the output current when triggered. A fault signal is actively output during these protective events. The IC supports Schmitt input for logic levels and includes a power-on reset function to ensure reliable startup.

Feature Summary

• Built-in overcurrent and overheat detection functions that automatically disable output current upon fault conditions
• Active low fault signal output indicating overcurrent or overheat status
• Power-on reset function for reliable initialization
• Schmitt trigger input support for robust logic level handling

Applications

• Office photocopiers
• Printers

Procurement Notes

Verify the specific manufacturer source, as this component originates from Sanyo Semicon Device and is now distributed by ON Semiconductor. Confirm the exact ordering suffix matches your supply chain requirements. Ensure the datasheet version aligns with your design specifications. Cross-reference pinouts with compatible models like the STK672-732AN-E if pin compatibility is required for your PCB layout.

Selection Notes

Select this component for applications requiring a unipolar two-phase stepper motor driver with integrated protection. It is suitable for designs needing PWM current control without external complex circuitry. Consider its thermal dissipation capabilities and heat sink requirements based on the operating environment. Verify voltage and current ratings against your specific motor load to ensure safe operation within absolute maximum ratings.

Part Context

This part belongs to the STK672 series of thick-film hybrid ICs manufactured originally by Sanyo Semicon Device. The series is widely used in office automation equipment. The STK672-642AN-E specifically targets two-phase stepper motor control. It shares functional similarities with other members of the family but offers distinct electrical characteristics tailored for specific motor driving needs in compact form factors.

Replacement Considerations

The STK672-732AN-E is noted as having compatible pins, potentially allowing for direct footprint substitution if electrical parameters are sufficient. Other generic two-phase stepper motor drivers may require significant circuit redesign. Verify pin-to-pin compatibility and electrical specifications before substituting with non-family parts.