The design methodology of high-power-density adapter based on flying capacitor converter and series power decoupling topology for PD3.1 application

The increased power demand and the need for fast charging have brought great challenges to the design of adapters. Usually, the bottlenecks are from passive components, which are inductors and capacitors. The problem of large inductor's size can be solved with multilevel topology and power decoupling technique can be used to reduce the capacitor's size. In this paper, a complete guidance is provided to design a high efficiency and high-power-density adapter. The system achieves the power density of 110W/in
³
and the efficiency of 95.5%.