A Dual-Input Bidirectional 3-Level Battery Charger with Coarse-Fine VCF Balancing and Wide VCR for Foldable Mobile Applications. - Woojin Hong; Hyebong Ko; Jinwoo So; Woonhyung Heo; Yonghwan Cho; Jeongdu Yoo; Ho-Sung Son; Youngwoo Chung; Dong-Joon Kim; Youngwoo Park; Byeonghyeon Jin; Sungkyu Cho; et al. (ISSCC, 2025)