An Integrated Dual-side Series/Parallel Piezoelectric Resonator-based 20-to-2.2V DC-DC Converter Achieving a 310% Loss Reduction

📋 论文概要

该论文提出了一种基于双面串并联压电谐振器的集成DC-DC转换器，实现20V到2.2V的高降压比。通过创新拓扑和利用压电谐振器的高Q特性，显著降低了转换损耗，解决了传统电感式转换器体积大、高频损耗高的问题。

💡 主要创新点

• 采用双面串并联压电谐振器拓扑，实现高降压比和低损耗。
• 将压电谐振器集成于硅基，实现小型化、低成本的批量制造。
• 利用压电谐振器的零电压开关和软充电特性，提高转换效率。

🏷 关键词

📄 原文摘要

CEA-Léti, Grenoble, France 1 2 Piezoelectric resonators (PRs) have recently emerged as an attractive substitute for inductors to process energy in DC-DC converters, due to their low-volume planar formfactors, superior volume/frequency scaling capabilities, very high Q, ability to be batch fabricated at low cost, and integration potential directly into Si (Fig. 8.6.1 top left) [1–3]. The baseline PR converter described in the literature [1] (Fig. 8.6.1, top right), achieves high efficiency by operating the PR in the inductive region and enabling zero-voltage switching (ZVS) and soft-charging of the PR’s junction capacitor, CP. However, as shown in Fig. 8.6.1 (bottom left), the PR’s utilization factor, K, is maximal at a voltage conversion ratio (VCR) of 0.5, and falls off rapidly at lower VCRs [1]. At the lower VCRs demanded by many modern DC-DC applications (e.g., VCR<0.1), the PR mostly circulates current

👥 作者与机构

Wen-Chin Brian Liu1, Gaël Pillonnet2, Patrick P. Mercier1

University of California, San Diego, CA