报告摘要：With ever increasing current consumption and clock frequency, today’s microprocessors are operating at very low voltage and continuously switching between the “sleep-mode” and “wake-up mode” up to tens of mega Hertz in order to conserve energy. Recent advancement of CPU and GPU, by adopting the multi-core parallel processing, have demonstrated performance improvements at a rate even beyond Moore’s Law. For example, the new generation of GPU has grown into 600 cores and demands 1000 amperes of current. This rapid advancement in processor technologies has imposed significant challenge to the power delivery and management.
The current form of Data center power architecture was development based on available, off the shelf, power supplies and is deemed inadequate for the current generation of data centers. An earnest effort led by Intel, Google, Microsoft, Amazon, Facebook, Huawei and many others, has been underway by adopting 48V based voltage regulators with significant improvement of overall system efficiency.
This talk will address the major challenges and design options for this new generation of power delivery architecture, in terms of efficiency, power density, and manufacturability. The author will further share some thoughts on more advanced power architecture beyond the current main-stream development activities. What is perceived as an ultimate solution should be the one that is able to achieve a total system efficiency up to 90% with minimum power conversion stages and is modularized and scalable for future needs.

报告人简介：Dr. Lee is a University Distinguished Professor Emeritus at Virginia Tech. He is a member of the U.S. National Academy of Engineering, an academician of Taiwan’s Academia Sinica, and a foreign member of the Chinese Academy of Engineering, China. Dr. Lee founded the Center for power electronics and led a program that encompasses research, technology development, educational outreach, industry collaboration, and technology transfer. To date, more than 215 companies worldwide have benefited from this industry partnership program.

Dr. Lee has supervised to completion 87 Ph.D. and 93 M.S. students. He holds 89 US patents with additional 14 pending, and has published over 290 journal articles and more than 710 refereed technical papers. His research interests include high-frequency power conversion, magnetics and EMI, distributed power systems, renewable energy, power quality, high-density electronics packaging and integration, and modeling and control. Dr. Lee is a fellow of the US National Academy of Inventor, and the recipient of the 2015 IEEE Medal in Power Engineering “for contributions to power electronics, especially high-frequency power conversion."