Cool-Running Constant-Current Stepper Motor Driver Handles Up to 36 V

March 3, 2025

An improved stepper motor driver IC, which offers 50% lower on-resistance, lets engineers increase the power rating of their designs while reducing waste heat.

Lee Goldberg

Related To: Electronic Design

The TB67S559FTG 50-V/3.0-A stepper motor driver IC, developed by Toshiba Electronics, supports constant-current control with built-in current detection. Housed in a 5.0- × 5.0-mm QFN32 package, the TB67S559FTG operates over a wide 8.2- to 44-V output voltage range to cover 12-, 24-, and 36-V applications, including office-automation (OA) equipment, point-of-sale (POS) terminals, vending machines, surveillance cameras, industrial equipment, and more.

Manufactured using a BiCD (bipolar CMOS DMOS) process, this upgraded version of the 40-V/2.0-A TB67S539FTG, offers enhanced power ratings and an R_DS(on) of 0.4 Ω. In sleep mode, the device draws a maximum current of 1 μA.

For more information on the new TB67S559FTG stepper motor IC, click here.

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About the Author

Lee Goldberg | Contributing Editor

Lee Goldberg is a self-identified “Recovering Engineer,” Maker/Hacker, Green-Tech Maven, Aviator, Gadfly, and Geek Dad. He spent the first 18 years of his career helping design microprocessors, embedded systems, renewable energy applications, and the occasional interplanetary spacecraft. After trading his ‘scope and soldering iron for a keyboard and a second career as a tech journalist, he’s spent the next two decades at several print and online engineering publications.

Lee’s current focus is power electronics, especially the technologies involved with energy efficiency, energy management, and renewable energy. This dovetails with his coverage of sustainable technologies and various environmental and social issues within the engineering community that he began in 1996. Lee also covers 3D printers, open-source hardware, and other Maker/Hacker technologies.

Lee holds a BSEE in Electrical Engineering from Thomas Edison College, and participated in a colloquium on technology, society, and the environment at Goddard College’s Institute for Social Ecology. His book, “Green Electronics/Green Bottom Line - A Commonsense Guide To Environmentally Responsible Engineering and Management,” was published by Newnes Press.

Lee, his wife Catherine, and his daughter Anwyn currently reside in the outskirts of Princeton N.J., where they masquerade as a typical suburban family.

Lee also writes the regular PowerBites series.