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本文提出一种12V输入、1V-1.8V输出的双电感四路径混合DC-DC转换器，解决了传统buck转换器在小占空比下效率低和开关管电压应力高的问题。该转换器实现了93.7%的峰值效率，适用于便携设备和汽车电子等高效能应用。
Sai-Weng Sin1, Rui P. Martins1,3 University of Macau, Macau, China Zhuhai UM Science & Technology Research Institute, Zhuhai, China 3 Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 A high-efficiency 12V-input 1V–1.8V-output DC-DC converter with wide output current range is highly desirable in energy-efficient portable devices (e.g., laptops) and automotive applications. In such applications, the considerably small duty ratio D (D<0.1) and power switches’ high voltage stress of the conventional buck converter brings significant efficiency penalty (Fig. 11.10.1, top left). Both industry and academia have developed many hybrid DC-DC converter topologies to overcome these problems [1–6]. The double step-down (DSD) converter, shown in Fig. 11.10.1 (top right), is the most popular solution [2–4] for this application. In the DSD converter, the flying capacitor CF sustains half of VIN, relaxing the voltage stress of the switches to VIN/2 and enlarging the
Wen-Liang Zeng1,2, Guigang Cai1, Chon-Fai Lee1, Chi-Seng Lam1, Yan Lu1,