EPC supports NVIDIA MGX with 800V-to-12.5V design
Efficient Power Conversion (EPC) has provided additional details on its EPC91123 evaluation board, an 800 VDC to 12.5 VDC, 6 kW isolated converter designed to support next-generation NVIDIA MGX AI data centre power architectures.
By enabling direct 12.5 V conversion and eliminating the need for a 48 V intermediate stage, the solution improves overall system efficiency by 1–2 percent. The converter is built on an input-series, output-parallel (ISOP) LLC topology and leverages Gen7 devices, including the 3.3 mm × 2.6 mm, 40 V, 0.8 mΩ EPC2366 and 150 V, 2.2 mΩ EPC2305.
According to EPC the solution achieves 98.2 percent peak efficiency and 97 percent full-load efficiency. Optimised for space-constrained AI server environments, the board delivers high power density in a compact 104 mm × 47 mm × 8 mm form factor.
“AI data centres consume tremendous amounts of power, making it critical to reduce power conversion stages to improve efficiency and power density, especially in 800 V architectures,” said Alejandro Pozo, director of DC-DC system engineering. “The ISOP topology is particularly well suited for high step-down-ratio power conversion, enabling improved transformer optimisation and interleaved operation. It has been selected for our next 800VDC to 6VDC platform.”
The EPC91123 builds on EPC’s broader strategy for 800 VDC AI power delivery, where the company is developing highly efficient conversion architectures spanning 800 VDC to 48 VDC, 12 VDC, and 6 VDC to address different system-level requirements in AI infrastructure. By leveraging advanced GaN-based ISOP topologies and its latest Gen7 eGaN technology, EPC aims to provide scalable, high-density power solutions that improve efficiency, reduce distribution losses, and support next-generation accelerated computing platforms.
“NVIDIA MGX provides a modular foundation for scalable accelerated computing. A key element of NVIDIA’s strategy for AI infrastructure is the use of 800 VDC power architecture, helping address the growing demands for efficiency and power density as AI compute scales. We are pleased to contribute to the NVIDIA MGX AI Factory ecosystem with advanced multi-level GaN-based power conversion solutions designed to support emerging 800 VDC server architectures and next-generation AI infrastructure,” said Alex Lidow, CEO and co-founder of EPC.
