STK672-440AN-E

Overview

The STK672-440AN-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. The device includes a power-on reset function and supports Schmitt inputs for 2.5V high-level logic. Motor current is adjustable via two external resistors using an internal 0.089Ω detection resistor. The enable pin allows output current cutoff while maintaining excitation mode.

Feature Summary

• Built-in overcurrent and overheat detection with active-low fault signaling
• Supports Schmitt input for 2.5V high-level logic compatibility
• Adjustable motor current via external resistors and internal detection resistor
• Enable pin functionality for excitation mode maintenance during current cutoff

Applications

• Office photocopiers
• Printers
• X-Y plotters

Procurement Notes

Verify the manufacturer origin, as this component was originally developed by Sanyo Semicon Device before corporate acquisitions. Confirm the specific suffix 'E' denotes environmental compliance status according to official documentation. Ensure the SIP-22 package dimensions match your PCB footprint requirements. Check for any obsolescence notices or lifecycle status updates from the current rights holder.

Selection Notes

Select this component for applications requiring precise 2-phase stepper motor control with integrated protection mechanisms. The built-in PWM current control offers efficient operation compared to fixed-current drivers. Consider the thermal dissipation capabilities if operating near maximum ratings. The microstep support and phase hold functions make it suitable for precision positioning tasks in office automation equipment.

Part Context

This part belongs to the STK672 series of thick-film hybrid ICs, originally manufactured by Sanyo Semiconductor. The series includes various models tailored for different phase configurations and current requirements. The STK672-440AN-E specifically targets 2-phase unipolar stepper motors, offering a compact solution for integration into space-constrained office automation devices.

Replacement Considerations

The STK672-732AN-E is documented as having compatible pins with the STK672-440AN-E. Verify electrical parameter alignment, particularly output current ratings and voltage specifications, before substitution. Other models in the STK672 family may require circuit modifications due to differing phase configurations or control interfaces.