STK672-632AN-E

Overview

The STK672-632AN-E is a thick-film hybrid IC designed for unipolar, two-phase stepper motor applications. It integrates PWM current control and phase signal distribution to manage motor excitation. The device features a single-ended output configuration with a maximum collector current of 2A and a maximum collector-emitter voltage of 42V. It operates within a supply voltage range of 4.75V to 5.25V. The component utilizes a SIP package with 19 pins, measuring 24.2mm in length, 14.4mm in width, and 4.5mm in height. It supports an operating temperature range from 0°C to +105°C.

Feature Summary

• Integrates built-in overcurrent and overheat detection functions that automatically cut output current upon fault conditions.
• Outputs an active-low fault signal when overcurrent or overheat protection mechanisms are triggered.
• Includes a power-on reset function to ensure stable initialization during startup sequences.
• Supports Schmitt trigger inputs allowing operation with a 2.5V high-level input signal.

Applications

• Office photocopiers
• Printers
• X-Y plotters

Procurement Notes

Verify the specific suffix AN-E against official onsemi documentation to confirm pinout compatibility and thermal characteristics. Ensure the application circuit provides adequate heat sinking if ambient temperatures approach the upper limit of the specified operating range. Confirm that the external resistors used for current setting match the internal detection resistor tolerance specifications to maintain accurate current regulation.

Selection Notes

Select this component for designs requiring a compact, single-chip solution for driving small to medium-sized unipolar stepper motors. It is suitable for systems where space constraints favor SIP packaging over surface-mount alternatives. Consider its fixed current control architecture when designing circuits that do not require complex microstep interpolation or advanced digital communication interfaces.

Part Context

This part belongs to the STK672 series of thick-film hybrid integrated circuits developed by onsemi (formerly Sanyo Semiconductor). The series is widely recognized in the office automation industry for providing reliable motor drive solutions. These hybrids combine power MOSFETs with control logic to simplify driver design for manufacturers of printers and copiers.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with similar models such as STK672-630AN-E or STK672-740AN-E only through direct datasheet comparison of pinouts and electrical ratings.