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本文提出了一种1200V转48V的LLC谐振转换器，支持恒流/恒压充电模式，符合电动汽车供电设备（EVSE）Level 1标准。该转换器通过优化拓扑和控制策略，实现了高压到低压的高效转换，满足了电动汽车电池快速充电的需求。
Yu-Ting Huang1, Xiao-Quan Wu1, Ke-Horng Chen1, Kuo-Lin Zeng1,2, Ying-Hsi Lin3, Shian-Ru Lin3, Tsung-Yen Tsai3 National Yang Ming Chiao Tung University, Hsinchu, Taiwan Chip-GaN Power Semiconductor, Hsinchu, Taiwan 3 Realtek Semiconductor, Hsinchu, Taiwan 1 2 With the tremendous and fast-growing demand for electric vehicles (EVs), the efficiency of 48V EV battery charging becomes the crux of the matter. The 1200V power supply of electric vehicle supply equipment (EVSE) will become the mainstream specification of EV charging base to achieve efficient and fast charging. However, the low voltageconversion ratio (VCR) of only 4% results in inefficiency and is impractical in conventional step-down chargers. Although many exotic topologies have been proposed, such as multilevel topology and double step-down (DSD) topology, the hard-switching operation during the high-side (HS) switches turn-on accounts for most of the power
Tz-Wun Wang1, Sheng-Hsi Hung1, Po-Jui Chiu1, Chi-Yu Chen1, Chang-Lin Go1,