STK672-040-E

Overview

The STK672-040-E is a thick-film hybrid IC designed for unipolar constant-current chopper-type stepper motor control. It integrates a micro-stepping controller to enable high-torque, low-vibration operation with simple external circuitry. The device utilizes MOSFET power devices and operates within a supply voltage range of 10 V to 45 V. It features a 22-pin SIP package with dimensions of 53 mm in length, 22 mm in width, and 9 mm in height. The typical switching frequency is 57 kHz, and the maximum operating temperature reaches +150 °C.

Feature Summary

• Integrates a built-in micro-stepping controller for distributed control to reduce vibration and noise.
• Employs unipolar constant-current chopper technology using internal MOSFET power devices.
• Provides overcurrent and overheat detection functions that automatically cut output current upon fault detection.

Applications

• Stepper motor drivers for printers
• Stepper motor drivers for copiers
• X-Y plotter stepping motor drivers

Procurement Notes

Verify the specific suffix (e.g., -E) against the manufacturer's official ordering information to ensure correct packaging and compliance status. Confirm that the SIP-22 through-hole package matches the target PCB layout. Check current availability status as this component may be subject to discontinuation or limited supply conditions.

Selection Notes

Select this component for applications requiring precise micro-stepping control in unipolar stepper motor systems. Ensure the input logic levels are compatible with the required supply voltages. Verify that the thermal management strategy supports the specified maximum junction temperature limits during continuous operation.

Part Context

This part belongs to the STK672 series of thick-film hybrid ICs manufactured by onsemi. These devices are specialized for driving 4-phase stepping motors with integrated control logic. The series provides various current ratings and pin configurations to suit different motor drive requirements while maintaining compact form factors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

What type of motor driver topology does the STK672-040-E use?

It uses a unipolar constant-current chopper-type topology with externally-excited 4-phase stepping motor control.

How does the device handle fault conditions?

It includes built-in overcurrent and overheat detection functions that turn off the output current when faults are detected.