STK672-432AN-E

Overview

The onsemi STK672-432AN-E is a thick-film hybrid integrated circuit designed for unipolar, two-phase stepper motor applications. It features a single-pole output configuration with a maximum IGBT collector current of 2A and a maximum collector-emitter voltage of 42V. The device operates within a supply voltage range of 4.75V to 5.25V and supports a typical switching frequency of 48kHz. Housed in a SIP package with 19 pins, the component measures 29.2mm in length, 14.4mm in width, and 4.5mm in height. It functions reliably across an operating temperature range from 0°C to +105°C.

Feature Summary

• Integrates PWM current control for precise unipolar stepper motor driving
• Includes built-in overcurrent and overheat detection with automatic output shutdown
• Features active-low fault signal output for system monitoring
• Supports Schmitt input compatibility for 2.5V high-level logic signals

Applications

• Office photocopiers
• Printers
• X-Y plotters

Procurement Notes

Verify the specific suffix against official documentation, as variations may indicate different thermal or mechanical specifications. Confirm availability status through authorized channels, as end-of-life products may have limited sourcing options. Ensure the selected variant matches the required pin count and package dimensions for the target PCB layout. Cross-reference the manufacturer's latest datasheet to validate electrical ratings before finalizing procurement decisions.

Selection Notes

Select this component when designing systems requiring a compact, hybrid IC solution for unipolar stepper motors. The 2A current rating suits moderate-load applications such as office automation equipment. Consider the SIP package constraints for thermal management and board space. Verify that the 42V voltage rating aligns with the motor coil requirements. Ensure the control logic meets the specified input voltage thresholds for reliable operation.

Part Context

This part belongs to the STK672 series of thick-film hybrid ICs developed by onsemi (formerly Sanyo Semiconductor). The series is widely recognized for its reliability in motion control applications. The STK672-432AN-E specifically targets two-phase stepper motor drivers, offering integrated protection features to enhance system robustness in consumer and industrial office equipment environments.

Replacement Considerations

The STK672-632AN-E is documented as a compatible alternative within the same family, sharing similar electrical characteristics and pin configurations. Verify mechanical dimensions and thermal performance before substitution. Other variants in the STK672 series may offer different current ratings or package types; ensure functional equivalence for the specific application requirements.