STK672-640CN-E

Overview

The STK672-640CN-E is a hybrid integrated circuit designed as a unipolar, two-phase stepper motor driver featuring PWM current control. It utilizes an IGBT output configuration housed in a 19-pin SIP package. The device supports a maximum collector-emitter voltage of 46 V and delivers a peak collector current of 4 A. Operating parameters include a supply voltage range of 4.75 V to 5.25 V and a typical switching frequency of 45 kHz. The component is rated for operation up to +105 °C.

Feature Summary

• Built-in motor terminal open detection function that automatically turns off output current upon fault detection
• Integrated PWM current control mechanism for precise stepper motor regulation
• Hybrid IC construction combining logic and power stages for compact system integration

Applications

• Office photocopiers
• Printers
• Unipolar stepper motor drive systems

Procurement Notes

Verify the specific suffix CN-E against official onsemi documentation to confirm pinout and thermal characteristics. Ensure the application environment remains within the specified 4.75 V to 5.25 V supply range. Confirm that the 4 A peak current rating aligns with the connected stepper motor requirements. Validate that the operating temperature does not exceed the +105 °C limit during continuous duty cycles.

Selection Notes

Select this component for applications requiring a dedicated unipolar stepper driver with integrated protection features. The 19-pin SIP package facilitates through-hole mounting for robust mechanical connections. Consider the 46 V voltage rating when driving motors with higher back-EMF. The built-in open detection simplifies fault management without external sensing circuits.

Part Context

This part belongs to the STK672 series of hybrid stepper motor drivers from onsemi. These devices are engineered for office automation equipment where reliable motion control is critical. The series typically integrates gate drivers, protection logic, and power outputs into a single module to reduce board space and design complexity.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement maintains the 19-pin SIP form factor and unipolar output configuration. Verify compatibility with the 4.75–5.25 V supply voltage and similar current handling capabilities.