An 85-to-230VAC to 3.3-to-4.6VDC 1.52W Capacitor-Drop Sigma-Floating-SC AC-DC Converter with 81.3% Peak Efficiency

📋 论文概要

本文提出了一种基于电容降压和Sigma-Floating-SC架构的非隔离AC-DC转换器，适用于IoT和智能家居设备。该转换器可将85-230VAC输入转换为3.3-4.6VDC输出，功率达1.52W，峰值效率81.3%，解决了传统电感式或线性稳压方案成本高、体积大的问题。

💡 主要创新点

• 采用电容降压（Capacitor-Drop）技术实现大电压转换比，无需电感，降低成本和体积。
• 提出Sigma-Floating-SC（Sigma-Floating Switched Capacitor）架构，实现高效AC-DC转换。
• 在宽输入电压范围（85-230VAC）内保持81.3%的峰值效率，适用于智能电表等应用。

🏷 关键词

📄 原文摘要

Tsinghua University, Beijing, China 1 2 *Equally Credited Authors (ECAs) The internet-of-things (IoT) and smart home devices, such as smart power meters and smart remote control, have great demand for high-efficiency, low-cost and compact nonisolated AC-DC converter, which operates on the AC mains and delivers a battery-voltage output with a large voltage conversion ratio (VCR). These devices are becoming increasingly more intelligent and thus have higher power consumption. Traditional approaches involve inductive switching converter [1–4] and high-voltage linear regulator [5,6], which lead to bulky volume or low efficiency. In contrast, fully integrated switched-capacitor (SC) topology

👥 作者与机构

Fei Song*1, Shousheng Han*1,2, Rui P. Martins1, Yan Lu1,2

University of Macau, Macau, China