Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title An Integrated Transformer-based LED Power Supply with Wide-Output-Voltage Control
Authors Cheol-Ha Kang ; Jong-Seong Ju ; Eun-Soo Kim ; Jong-Seob Won ; Young-Soo Lee ; Dong-Hee Kim
DOI 10.6113/TKPE/2015.20.5.437
Page pp.437-447
ISSN 1229-2214
Keywords Integrated transformer; LLC resonant converter; CRM PFC converter; LED PSU
Abstract In this paper, implementation of an integrated transformer applicable to power supply units (PSUs) for a 150-W LED with a wide range of output voltage is presented. The transformer is comprised of a PFC inductor and an LLC resonant transformer, each of which is placed and integrated on an E?I?E-type magnetic core. Integrated transformers with two different air gap topologies (i.e., the side and center gap topologies) are considered in the design phase to investigate their applicability. The design consideration on the LLC resonant converter used for the wide-output-voltage control ranges is described, and the overall performance of the proposed system is verified through realization of it onto a 150-W LED PSU board.