onsemi

STK672-440BN-E

STK672-440BN-E Description

The STK672-440BN-E from onsemi is a high-performance unipolar stepper motor driver IC designed for general-purpose applications. Housed in a 19-pin SIP (Single Inline Package), this obsolete but robust driver integrates Power MOSFET technology to deliver efficient motor control. It operates within a 4.75V to 5.25V supply range and supports load voltages up to 46V, making it suitable for diverse industrial and automation systems. With a 3A output current capability and half-bridge (2) configuration, it ensures reliable power delivery for unipolar stepper motors. The device offers flexible step resolution (1, 1/2, 1/4, 1/8, 1/16), enabling precise motion control. Its parallel interface simplifies integration, while the through-hole mounting ensures mechanical stability.

STK672-440BN-E Features

• High Current Output: Supports 3A per phase, ideal for driving medium-power stepper motors.
• Wide Voltage Range: 0V to 46V load voltage compatibility for versatile applications.
• Multi-Step Resolution: Five selectable microstepping modes (1 to 1/16 step) for smooth and precise positioning.
• Robust Construction: Power MOSFET technology ensures low heat dissipation and high efficiency.
• Easy Integration: Parallel interface simplifies control logic implementation.
• Compliance: ROHS3 and REACH compliant, with MSL 1 (Unlimited) for extended shelf life.
• Thermal Resilience: Operates reliably in 0°C to 105°C (TC) environments.

STK672-440BN-E Applications

This driver is optimized for:

• Industrial Automation: CNC machines, robotic arms, and conveyor systems requiring precise motion control.
• Office Equipment: Printers, scanners, and copiers where unipolar stepper motors are prevalent.
• Medical Devices: Laboratory instruments and diagnostic equipment needing reliable positioning.
• Consumer Electronics: Automated cameras, projectors, and other motion-controlled devices.
• Legacy Systems: Upgrades or repairs of older equipment due to its through-hole design and obsolete status.

Conclusion of STK672-440BN-E

The STK672-440BN-E stands out for its high current handling, flexible microstepping, and broad voltage compatibility, making it a versatile choice for unipolar stepper motor applications. While obsolete, its efficiency, durability, and ease of use ensure continued relevance in industrial and consumer systems. Engineers seeking a reliable, high-performance driver for legacy or precision-focused designs will find this IC a compelling solution.