Trends in AI Server Power Supply Architectures

This document is a technical report detailing the evolving power supply unit (PSU) architectures for artificial intelligence (AI) servers. It discusses the increasing demand for efficient and high-density power solutions driven by the growth of AI workloads in hyperscale data centers. The paper outlines the unique requirements of AI applications, including precise power delivery and fast transient response, and explains how Skyworks Solutions is addressing these challenges through innovative power management strategies. The report also describes the transition from traditional power architectures to high voltage direct current (HVDC) systems and the benefits of adopting Open Compute Project (OCP) standards for improved efficiency and scalability. Furthermore, it presents a comparison of current and emerging PSU architectures, highlighting the technical specifications and advantages of using silicon carbide (SiC) transistors. Overall, the report emphasizes the imperative for data centers to adapt to the power demands of advanced AI applications to support future growth.