发表机构
University of California at Santa Barbara（加州大学圣巴巴拉分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
提出一种仅需单电感的 N:1 谐振开关电容梯形变换器，通过将底部开关作二极管运行实现连续宽范围电压调节，理论模型与仿真验证准确，硬件原型在 30 欧姆负载下峰值效率达 97%，测量误差小于 0.63%。
AI 中文摘要
本文提出了一种 N:1 谐振开关电容（ReSC）梯形变换器，其输出电压可在保持高效率的同时，连续调节至低于固有 N:1 谐振比。该拓扑可推广至任意 N 比 1 的直流-直流变换应用，且仅需一个电感。通过将 ReSC 开关的底部堆栈作为二极管运行，使其开关始终与电感电流同相，从而实现高效宽范围电压调节，进而避免了在频率控制下增加电感 RMS 电流和欧姆损耗的循环电流。已建立理论模型以预测变换器的输出电压和效率，仿真结果证实了该模型在 N=1、2 和 4 时的准确性。开发了印刷电路板上的硬件原型，以验证所提出的频率控制调节方案的性能。该原型在 30 欧姆（分别为 6 欧姆）负载下实现了 97%（94.3%）的峰值效率，并在从 40V 至 60V 输入生成 9V USB 兼容电压时效率高于 90%。测量结果与模型预测的误差在 0.63% 以内。
英文摘要
This paper presents an N:1 resonant switched-capacitor (ReSC) ladder converter of an output voltage that can be regulated continuously below the native N:1 resonant ratio while maintaining high efficiency. The topology can be generalized to any N-to-1 dc-dc conversion application while requiring only a single inductor. Efficient wide-range voltage regulation is realized by operating the bottom stack of the ReSC switches as diodes to maintain their switching always in phase with the inductor current, and hence, circumvent circulating currents that increase the inductor RMS current and ohmic losses under frequency control. A theoretical model has been developed to predict the output voltage and efficiency of the converter, with simulation results confirming its accuracy for N = 1, 2, and 4. A hardware prototype on a printed circuit board is developed to validate the performance of the proposed frequency-controlled regulation scheme. The prototype achieves a peak efficiency of 97% (94.3%) with a load of 30Ohms (resp. 6Ohms) and an efficiency >90% while generating a 9V USB-compatible voltage from a 40V-to-60V input. The measurement results match the model predictions within 0.63% accuracy.
