STK682-010-E

Overview

The STK682-010-E is a hybrid IC designed as a bipolar, two-phase step motor driver featuring PWM current control. It supports selectable phase excitations including 2, 1-2, W1-2, 2W1-2, 4W1-2, 8W1-2, 16W1-2, and 32W1-2 modes. The device operates with a maximum supply voltage (VM) of 36V DC and a maximum operating current (Iop) of 3.0A. At 25°C and 2.5A output, the high-side on-resistance is 0.3 Ω, low-side is 0.25 Ω, totaling 0.55 Ω. Integrated protections include over-current detection and thermal shutdown.

Feature Summary

• Supports multiple phase excitation modes from full-step to 32-wave micro-stepping
• Includes automatic half-current maintenance energizing function for reduced power consumption
• Integrates over-current protection and thermal shutdown circuits for system safety

Applications

• Bipolar stepper motor drive systems
• Industrial automation equipment requiring precise motion control
• Office automation devices such as printers and scanners

Procurement Notes

Verify the component marking and package type ZIP9 against official datasheets to confirm authenticity. Ensure the replacement application matches the original circuit requirements regarding voltage and current ratings. Confirm that the specific excitation mode settings align with the intended motor control strategy before final integration.

Selection Notes

Select this hybrid IC when a complete solution for bipolar stepper motors is required without external power transistors. Consider the built-in protections if space constraints prevent adding discrete protection components. Evaluate the thermal performance based on the total on-resistance and expected load currents in the specific enclosure environment.

Part Context

This component belongs to the STK series of hybrid integrated circuits manufactured by onsemi. These devices are engineered to simplify the design of motor control systems by combining power drivers and logic functions into a single package. The STK682-010-E specifically targets applications needing flexible micro-stepping capabilities.

Replacement Considerations

The THB7128 is identified as a compatible alternative part number for this component.