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Controller/MOSFET Module Produces Compact Power Solutions Up to 60 W

June 10, 2025

Infineon’s integrated system power controller, housed in a small SMD package, is aimed at appliances and AI servers.

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Infineon Technologies’ new CoolSET system-in-package (SiP) is a compact, fully integrated system power controller for high-efficiency power delivery of up to 60 W at a universal input voltage range of 85 to 305 V AC. Coming in a small SMD package, the high-voltage MOSFET with low R_DS(on) eliminates the need for an external heatsink, reducing system size and complexity.

The CoolSET SiP supports zero-voltage-switching (ZVS) flyback operation, which enables low switching losses and low EMI signature, while also enhancing system reliability and robustness. As a result, it’s a good fit for applications such as major home appliances and AI servers that must meet stringent international energy standards.

The CoolSET SiP integrates a 950-V startup cell, an 800-V avalanche rugged CoolMOS P7 SJ MOSFET, a ZVS primary flyback controller, a secondary-side synchronous-rectification controller, and reinforced isolated communication enabled by Infineon’s proprietary CT Link technology. A comprehensive set of advanced protection features simplifies system integration and gives designers more flexibility to optimize their solutions and enhance the overall user experience.

CoolSET SiP product samples are available to order. Infineon showed a demo version at PCIM Europe 2025. Further information is available here.

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.