Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Design and Implementation of 500 kHz High Frequency LLC Resonant Converter for High Power Density
Authors Hwa-Pyeong Park, Jee-Hoon Jung ;
DOI 10.6113/TKPE/2015.20.1.51
Page pp.51-58
ISSN 1229-2214
Keywords High frequency; LLC resonant converter; Soft switching; High power density
Abstract In order to decrease the size of a switch mode power supply, high switching frequency can be an efficient way to reduce the size of passive components in the converter. In this paper, a 500-kHz high-frequency LLC resonant converter is proposed with an accurate design method of magnetizing inductance, as well as the relationship between the switching frequency and the size of the passive components. Simulation and experimental results are presented to verify the proposed methods and equations, including the temperature data of each passive and active device of the converter. Using those results, dominant power losses in the prototype converter under 500-kHz high-frequency operation are investigated, compared with the results from a 100-kHz converter. In addition, operating waveforms and power conversion efficiency will be shown to obtain design considerations for the high switching frequency LLC resonant converter.