An 85-264Vac to 3-4.2Vdc 1.05W Capacitive Power Converter with Idle Power Reduction and 4-Phase 1/10X SC Converter Achieving 5.11mW Quiescent Power and 78.2% Peak Efficiency

📋 论文概要

本文提出了一种85-264Vac到3-4.2Vdc的1.05W电容式功率转换器，用于离线IoT设备和传感器等应用。该转换器采用非隔离方案，通过空闲功率降低技术和4相1/10X开关电容转换器实现紧凑、低成本的AC-DC转换。

💡 主要创新点

• 提出了一种电容式AC-DC转换器架构，能够直接处理85-264Vac宽输入电压范围并输出3-4.2Vdc电池电压。
• 采用空闲功率降低技术，减少待机功耗，提升轻载效率。
• 引入4相1/10X开关电容转换器，实现高效的电压变换和功率传输。

🏷 关键词

📄 原文摘要

Chinese University of Hong Kong, Shenzhen, China 3 Iowa State University, Ames, IA 1 2 Smart homes and smart buildings require numerous offline devices such as IoT nodes, object sensors, smoke detectors, etc. Those devices usually get power from the AC main voltage and require converters to directly convert a universal 85-to-264Vac down to 3to-4.2Vdc battery voltages. Non-isolated AC-DC converters feature compact size, low cost, and easy deployment, and are in huge demand in recent years. Traditional nonisolated AC-DC converters use high-voltage (HV) linear or inductive switching regulators and have low efficiency or bulky system volume drawbacks. Compared with inductive counterparts, the capacitor-drop AC-DC power converter [1–4] uses an X-capacitor as a buffer to stand most of the high voltage and reduce the voltage level that is faced by the rectifier. It shows potential benefits of higher integration level [3, 4], more compact size,

👥 作者与机构

Gang Liu1,2, Han Wu1, Chen Hu1, Cheng Huang3, Xun Liu2, Junmin Jiang1

Southern University of Science and Technology, Shenzhen, China