STK681-070

Overview

The STK681-070 is a hybrid integrated circuit manufactured by Sanyo (now part of Semikron Danfoss). It functions as a three-phase motor driver designed for brushless DC motors. The module integrates power switching elements and control logic into a single package to facilitate efficient motor commutation. Key electrical parameters include a rated voltage of 400V and a continuous current capacity of 3A per phase. The device operates with a supply voltage range typically between 12V and 36V for the logic section, while the power stage supports higher voltages up to its maximum rating. It features built-in protection mechanisms such as overcurrent detection and thermal shutdown to ensure reliable operation in industrial applications.

Feature Summary

• Integrates three-phase bridge drivers with control logic for brushless DC motor commutation
• Includes built-in overcurrent protection and thermal shutdown circuits
• Designed for high-efficiency operation in compact hybrid packages

Applications

• Brushless DC motor drives in industrial automation equipment
• Fan and pump control systems requiring three-phase motor management
• Home appliance motor control units

Procurement Notes

Verify the manufacturer origin carefully, as Sanyo Semiconductor's discrete and hybrid IC business was acquired by Semikron Danfoss. Ensure the component matches the original Sanyo specifications if legacy compatibility is required. Check for updated part numbers or equivalent replacements from the current owner of the intellectual property. Confirm pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component when a compact solution for driving three-phase BLDC motors is needed. Consider the 3A current rating and 400V blocking voltage for appropriate load matching. Evaluate the thermal performance requirements based on the expected duty cycle and ambient temperature. Verify that the control interface signals align with the microcontroller or driver logic being used in the system design.

Part Context

The STK681 series represents a line of hybrid motor driver ICs historically produced by Sanyo Semiconductor. These modules were widely used in applications requiring reliable three-phase motor control. Following corporate restructuring and acquisitions, the product lineage continues under new ownership, maintaining the original functional specifications for backward compatibility in existing designs.

Replacement Considerations

Check Semikron Danfoss documentation for direct equivalents or updated part numbers replacing the Sanyo-branded STK681-070. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution.