Chong‑Eun Kim received his B.S. degree in electrical engineering from Kyungpook National University, Daegu, Korea, in 2001. He received his M.S and Ph.D degrees in Power Electronics from KAIST, Daejeon, Korea, in 2003 and 2008, respectively. He worked as a senior engineer to develop high-efficiency server power supply in Power R&D team of Samsung ElectroMechanics by 2015. He continued to develop server power supply in Power R&D team of SoluM, as a principal engineer by 2019. Currently, he is Assistant Professor in the Department of Control and Instrumentation Engineering, Gyeongsang National University, Jinju, Korea. His research interests are AC/DC and DC/DC converters, including bridgeless PFC boost converters, high-frequency LLC resonant converters, and high-efficiency PSFB converters.