News: Microelectronics
8 October 2026
Infineon launches 27kW three-phase PSU for AI server power architectures
As artificial intelligence workloads are redefining the power requirements of modern data centers, increasing GPU performance and rising rack densities are driving a shift toward 800VDC or ±400VDC power supply architectures. To address these requirements, Infineon Technologies AG of Munich, Germany is launching a 27kW three-phase power supply unit (PSU) solution for server ODMs and OEMs.
The reference design meets the requirements of the OCP Open Rack V3 (ORV3) specification and AI server rack architectures, further expanding Infineon’s comprehensive portfolio for powering AI servers. The solution helps developers to shorten time-to-market while improving rack power density, efficiency, and thermal performance.
The design combines Infineon components including 650V CoolSiC and CoolMOS MOSFETs, EiceDRIVER gate drivers, XENSIV current sensors, and PSOC micro-controllers. It achieves a peak efficiency of more than 98% at an input voltage of 480VAC and 50% load. The reference design uses a five-level ANPC PFC topology and a three-level LLC converter, reaching a power density of 116W/in3, compared with the ORV3 minimum requirement of 94W/in3. An integrated energy buffer provides a hold-up time of 20ms during short power grid disturbances. It also helps smooth the line voltage during rapid GPU load changes, eliminating the need for a separate capacitor bank unit (CBU). An integrated planar magnetic structure enables a compact, modular and scalable high-frequency transformer design.
The PFC and LLC stages are digitally controlled to respond to demanding AI load transients. The programmable power control accelerator (PPCA), integrated into the PSOC Control C3 Performance Line micro-controller, supports precise current and voltage regulation with fast dynamic response. The reference design supports a three-phase input voltage range of 311–528VAC and is therefore suitable for a range of global grid standards. It achieves low input-current total harmonic distortion (iTHD) and a power factor above 0.99 across most of the load operating range. The design supports operation at ambient temperatures from –5°C to 45°C.
The new 27kW three-phase PSU is being showcased at Infineon’s booth E26 at the 2026 Open Compute Project (OCP) Global Summit 2026 in San Jose, CA, USA (12–15 October) and at Infineon’s OktoberTech Silicon Valley 2026 on 22 October.
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