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STK672-640CN-E

STK672-640CN-E Description

The STK672-640CN-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, delivering 4A output current per half-bridge (2-channel configuration). It operates within a 4.75V–5.25V supply range, supporting load voltages up to 46V, and features a 1/2-step resolution for precise motor control. With a parallel interface, it simplifies integration into systems requiring unipolar stepper motor actuation. Its 150°C (TJ) operating temperature and ROHS3/REACH compliance ensure reliability in industrial environments.

STK672-640CN-E Features

• High Current Output: 4A per channel enables driving medium-to-high torque stepper motors.
• Wide Voltage Range: Supports 0V–46V load voltage, accommodating diverse motor specifications.
• Step Resolution: Offers 1 and 1/2-step modes for flexible motion control.
• Robust Construction: Through-hole mounting and Power MOSFET design enhance thermal performance and durability.
• Compliance: Meets ROHS3 and REACH standards, suitable for global markets.
• Simplified Interface: Parallel control reduces design complexity compared to serial alternatives.

STK672-640CN-E Applications

Ideal for systems requiring precise positioning and reliable unipolar stepper motor control, including:

• Industrial Automation: CNC machines, conveyor systems, and robotic arms.
• Medical Equipment: Pump controls and diagnostic device actuators.
• Consumer Electronics: 3D printers, automated camera platforms.
• Legacy Systems: Upgrades or replacements for obsolete motor drivers in maintenance-critical setups.

Conclusion of STK672-640CN-E

While marked obsolete, the STK672-640CN-E remains a viable solution for unipolar stepper motor applications demanding high current, wide voltage tolerance, and simple interfacing. Its MOSFET-based design and thermal resilience make it suitable for harsh environments, though designers should consider modern alternatives for new projects. For legacy systems or specific industrial needs, this driver offers a balance of performance, durability, and ease of integration.