STK672-400

Overview

The STK672-400 is a hybrid IC designed for unipolar, 2-phase stepping motor drivers with PWM current control. It supports microstep sinusoidal driving via external clock entry and allows selection of excitation modes including 2, 1-2, W1-2, 2W1-2, or 4W1-2 through external pins. The device features a phase holding function to prevent phase skip during operation and includes an internal noise filtering circuit on the CLK input pin. Motor current is adjustable via an external resistor connected to the Vref pin.

Feature Summary

• Supports microstep sinusoidal driving with selectable excitation modes
• Includes phase holding function to prevent phase skip
• Features internal noise filtering on the clock input pin

Applications

• Office photocopiers
• Printers

Procurement Notes

Verify the specific manufacturer designation, as this component originates from Sanyo Semicon Device, which was acquired by onsemi. Confirm that the part number suffix matches the exact datasheet version required for your design, particularly regarding the excitation mode selection and voltage reference configurations.

Selection Notes

Select this component when designing unipolar 2-phase stepping motor systems requiring microstep resolution. Ensure the application can accommodate the external resistor network for current setting and provides the necessary external clock signals. Verify compatibility with the required excitation modes before finalizing the design.

Part Context

This component belongs to the STK672 series of hybrid ICs originally developed by Sanyo Semicon Device. These devices are specialized for stepping motor control applications, offering integrated power MOSFETs and control logic in a single package to simplify driver circuit design.

Replacement Considerations

STK672-400C-E