A 120mA Non-Isolated Capacitor-Drop AC/DC Power Supply

📋 论文概要

该论文提出了一种非隔离电容降压式AC/DC电源，能够从高达305VACrms的交流输入直接产生5V/3.3V的稳压输出，负载电流达120mA。解决了智能电表、家电等应用中对小尺寸、低静态功耗和可靠性的需求。

💡 主要创新点

• 采用电容降压拓扑实现非隔离AC/DC转换，避免了笨重的变压器，显著减小了电源体积。
• 通过控制电路优化，在宽输入电压范围内保持高效率，并满足低负载时的静态功耗要求。

🏷 关键词

📄 原文摘要

meters, appliances, smoke alarms to ground fault detectors require a non-isolated DC supply that is powered directly from the AC mains. These applications typically require the ability to handle up to 305VAC,rms at the input while providing a regulated 5V/3.3V output at load currents %100mA. Small enclosure sizes in industrial electronics and home automation systems dictate the need for small form factors. In electricity metering, industry standards set targets for quiescent power and low-load efficiency of the system. Multiple commercial solutions are available to handle these requirements, the simplest of which uses a high-voltage (HV) linear regulator (LR) [1] to perform the down conversion. As shown in Fig. 18.3.1(a), since the output of the rectifier

👥 作者与机构

Yogesh Ramadass*1, Andres Blanco*2, Boqiang Xiao*3, John Cummings3, *Equally-Credited Authors (ECAs)

Texas Instruments, Santa Clara, CA, 2Texas Instruments, Dallas, TX Texas Instruments, Tucson, AZ 1 3 A wide variety of offline applications ranging from electricity