STK672-732AN-E

Overview

The STK672-732AN-E is a thick-film hybrid IC designed as a unipolar, 2-phase stepper motor driver with PWM current control. It features built-in overcurrent and overheat detection functions that trigger an active low fault signal when thresholds are exceeded. The device incorporates a power-on reset function and supports Schmitt input for a 2.5V high-level logic interface. Motor current is adjustable via two external resistors in conjunction with an internal detection resistor. The enable pin allows output current cutoff while maintaining the excitation mode.

Feature Summary

• Built-in overcurrent and overheat protection with automatic output current shutdown
• Active low fault signal output for diagnostic monitoring
• Power-on reset function for reliable initialization
• Schmitt input support for 2.5V high-level logic compatibility

Applications

• Office photocopiers
• Printers

Procurement Notes

Verify the specific manufacturer source document for the STK672-732AN-E to confirm exact ordering suffixes and package details. Ensure the component matches the required 2-phase unipolar stepper motor driver specifications. Cross-reference the absolute maximum ratings and thermal characteristics against the target application environment before finalizing procurement.

Selection Notes

Select this component for applications requiring a dedicated 2-phase stepper motor driver 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, specifically the 2.5V high-level input requirement supported by the Schmitt trigger inputs.

Part Context

This part belongs to the STK672 series of thick-film hybrid ICs manufactured by onsemi (formerly ON Semiconductor). These devices are specialized for driving stepper motors in office automation equipment. The series typically includes variants with different current capabilities and feature sets tailored for specific motor drive requirements.

Replacement Considerations

The datasheet notes compatibility with the STK672-740AN-E. Verify pin-to-pin compatibility and functional equivalence before substitution. Ensure the replacement part meets the same electrical and thermal requirements.