News: Microelectronics
10 September 2025
Infineon releases 12kW high-density PSU reference design for AI data centers and servers
Infineon Technologies AG of Munich, Germany is introducing a 12kW reference design for high-performance power supply units (PSUs), specifically designed for AI data centers and server applications, and targeted at R&D engineers, hardware designers, and developers of power electronics systems. Leveraging all relevant semiconductor materials silicon (Si), silicon carbide (SiC) and gallium nitride (GaN), the reference design is said to offer high efficiency and high power density.
“In the ongoing quest of the increased energy demand of artificial intelligence, Infineon’s contribution is to provide power solutions with the highest conversion efficiency to preserve every single possible Watt,” says Richard Kunčič, senior VP & general manager Power Switches at Infineon. “Our new 12kW high-density power supply unit reference design is using advanced power conversion topologies and therefore utilizing CoolMOS, CoolSiC and CoolGaN, which allows the PSU to release the full potential in energy efficiency, reliability and power density.”
To achieve high-performance levels, the design leverages advanced power conversion topologies in both the AC/DC and DC/DC power stages. The front-end AC/DC converter features a 3-level flying capacitor interleaved power factor correction (PFC) topology, delivering peak efficiency above 99% while reducing magnetic component volume. This is achieved by using Infineon’s CoolSiC technology, which offers high switching performance and excellent thermal properties, it is claimed. The isolated DC/DC converter features a full-bridge LLC resonant converter and offers peak efficiency above 98.5%, enabled by using two planar high-frequency transformer and Infineon’s CoolGaN technology. These architectures, combined with Infineon’s latest wide-bandgap technologies, achieve a power density of up to 113W/in3.
Another key feature of the 12kW PSU reference design is the bidirectional energy buffer, which is integrated into the overall power supply topology. This converter enables compliance with hold-up time requirements while significantly reducing capacitance requirements. Furthermore, the energy buffer provides a grid-shaping function, improving system reliability and limiting both fluctuations and the rate of change of power drawn from the grid during transient events.
Infineon is giving more information about the 12kW PSU reference design at its OktoberTech Taipei event on 11 September.
Infineon unveils roadmap for power supply units in AI data centers
