为了满足现代人们对于快充和便携性的需求，适配电源的效率和功率密度成为关键指标。现有方案在低压输入时，面临PFC电流纹波导致样机效率下降的问题，而设计采用的高压器件NFoM较大也导致变换器频率难以提升。为设计宽范围高效高密度AC/DC适配电源，本工作引入多电平和元胞化技术构建了三级拓扑架构，利用低压器件低NFoM特性大幅降低高频损耗。

To meet the modern demands for fast charging and portability, the efficiency and power density of adapters have become key indicators. The existing topology is faced with the problem that the efficiency of the prototype decreases due to PFC current ripple when the input is low voltage. Meanwhile, the high-voltage devices used in existing solutions have a relatively large New Figure of Merit (NFoM, NFoM=R_dsonC_o(tr)), which hinders frequency improvement. In order to design wide output range, high-efficient and high-density AC/DC adapters, multi-level and cell-based technologies are introduced to reduce high-frequency losses by utilizing low-voltage devices with low NFoM characteristics.

• 宽输入电压范围: 90Vac-264Vac
• 宽输出范围: 5Vdc-48Vdc，240W
• 90Vac满载效率：96.2% 高功率密度：>80W/in³
• 元胞化方案和多电平技术

• Wide input voltage range: 90Vac-264Vac
• Wide output range: 5Vdc-48Vdc, 240W
• full load efficiency at 90Vac: 96.2%; High power density: >80W/in³
• cellular technology and multi-level technology

往期相关成果：

1. 240W高效高密度PD适配器样机（2023年12月）

2. 240W适配器的高频开关共模噪声分析与抑制（2023年12月）