onsemi

STK672-640AN-E

STK672-640AN-E Description

The STK672-640AN-E from onsemi is a high-performance unipolar stepper motor driver IC designed for general-purpose applications. Housed in a 19-pin SIP (Single In-line Package), this driver integrates Power MOSFET technology to deliver robust 3.3A output current per half-bridge, supporting unipolar stepper motors with a voltage range of 0V to 42V. Operating within a 4.75V to 5.25V supply range, it ensures stable performance in diverse environments, with an operating temperature range of 0°C to 105°C (TC). The device offers 1 and 1/2 step resolution, enabling precise motor control for applications requiring fine positioning. Though marked as obsolete, it remains a reliable choice for legacy systems due to its ROHS3 compliance and REACH unaffected status.

STK672-640AN-E Features

• High Current Output: Delivers 3.3A per half-bridge, suitable for driving medium-power stepper motors.
• Wide Voltage Range: Supports 0V to 42V load voltage, accommodating various motor configurations.
• Flexible Step Resolution: Provides 1 and 1/2 step modes for enhanced motion control granularity.
• Robust Construction: Power MOSFET technology ensures efficient thermal performance and durability.
• Parallel Interface: Simplifies integration with microcontrollers and logic circuits.
• Compliance: ROHS3 compliant and MSL 1 (Unlimited) rated, ensuring environmental and handling reliability.

STK672-640AN-E Applications

• Industrial Automation: Ideal for CNC machines, robotic arms, and conveyor systems requiring precise stepper motor control.
• Office Equipment: Used in printers, scanners, and copiers for paper feed and positioning mechanisms.
• Medical Devices: Suitable for diagnostic equipment where smooth and accurate motor movement is critical.
• Legacy Systems: A dependable choice for maintaining or upgrading older designs due to its obsolete-but-reliable status.

Conclusion of STK672-640AN-E

The STK672-640AN-E stands out for its high current capability, flexible step resolution, and wide voltage tolerance, making it a versatile solution for unipolar stepper motor applications. While newer alternatives may exist, its proven reliability and compliance with environmental standards ensure continued relevance in industrial, office, and medical systems. Engineers seeking a cost-effective, high-performance driver for legacy or general-purpose designs will find this IC a practical choice.