STK672-530

Overview

The STK672-530 is a thick-film hybrid IC designed for unipolar, 2-phase stepper motor drivers with PWM current control. It features built-in overcurrent and overheat detection functions that trigger an active-low fault signal. The device includes a power-on reset function and simultaneous on prevention to ensure safe operation. It supports Schmitt inputs for low-level logic compatibility and allows motor current setting via external resistors connected to a built-in detection resistor. An enable pin permits output current cutoff while maintaining the excitation mode.

Feature Summary

• Built-in overcurrent and overheat detection with active-low fault signaling
• Power-on reset function and simultaneous on prevention mechanism
• Schmitt input support for low-voltage logic levels
• External current setting capability using internal detection resistor

Applications

• Office photocopiers
• Printers

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature range. Ensure the ordering code matches the exact electrical specifications required for the target application. Cross-reference with manufacturer documentation to validate authenticity and revision status before procurement.

Selection Notes

Select this component for applications requiring simple 2-phase stepper motor control with integrated protection. Verify that the external resistor values align with the desired motor current settings. Confirm compatibility with the system's logic voltage levels due to the Schmitt input characteristics.

Part Context

This part belongs to the STK672 series of hybrid ICs from onsemi (formerly Sanyo Semicon Device). These devices are specialized for driving unipolar stepper motors in office automation equipment. The series offers various current ratings and phase configurations to suit different motor requirements.

Replacement Considerations

Check for direct substitutes within the STK672 family, such as the STK672-740AN-E, ensuring pin compatibility and matching electrical ratings. Verify that any replacement maintains the same hybrid IC construction and protection features.