STK672-440A-E

Overview

The STK672-440A-E is a hybrid integrated circuit designed for unipolar, two-phase stepping motor applications. It integrates fully functional control and power stages with PWM current control capabilities. The device features built-in protection mechanisms including overcurrent detection, overheat detection, and motor terminal open detection functions. These safety features automatically turn off the output current when faults are detected, ensuring reliable operation in stepper motor drive systems.

Feature Summary

• Fully integrated driver with control and power stage functionality
• Built-in overcurrent and overheat detection with automatic output shutdown
• Motor terminal open detection function for fault monitoring
• PWM current control for precise motor regulation

Applications

• Unipolar two-phase stepping motor drives
• Industrial automation control systems
• Precision positioning equipment

Procurement Notes

Verify component authenticity through authorized onsemi distributors or direct manufacturer channels. Confirm part status as obsolete before procurement planning. Request original datasheets and test reports to validate technical specifications. Ensure storage conditions meet semiconductor handling standards to prevent degradation prior to installation.

Selection Notes

Select this component for unipolar stepper motor applications requiring integrated protection. Verify compatibility with existing control logic levels. Consider thermal management requirements due to integrated power stage design. Evaluate system voltage ranges against absolute maximum ratings. Assess footprint constraints against SIP package dimensions.

Part Context

The STK672 series represents onsemi's legacy hybrid IC lineup originally developed from SANYO Semiconductor technology. These components were widely used in industrial motor control before transitioning to newer discrete solutions. The STK672-440A-E specifically targets unipolar configurations, offering a compact alternative to discrete driver implementations.

Replacement Considerations

Compatible pin replacements include STK672-430AN and STK672-432AN-E models. Verify electrical parameters and pinout compatibility before substitution. Note that these alternatives may have different current ratings or protection thresholds.