Input voltage range extension methods in the series-resonant DC-DC convertersChub, Andrii; Vinnikov, Dmitri; Lai, Jih-Sheng2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC 2019) Santos, Brazil, 1-4 December 20192019 / p. 1493−1499http://toc.proceedings.com/52923webtoc.pdf