A 180MHz 45.3%-Peak-Efficiency Isolated Converter Using Q-Downsize Class-D Power Amplifier with Inherent Shoot-Through Current Blocking and High Tolerance for Efficiency Despite Frequency Misalignments

📋 论文概要

该论文提出了一种采用Q-Downsize D类功率放大器的隔离DC-DC转换器，通过固有贯通C特性抑制共模电流引起的电磁干扰（EMI），实现了180MHz开关频率和45.3%的峰值效率。

💡 主要创新点

• 提出了Q-Downsize Class-D功率放大器，在保证高效率的同时减小了开关损耗和电磁干扰。
• 利用固有贯通C结构抑制共模电流变化，降低输入到输出的偶极子辐射。
• 采用全对称发射机拓扑进一步减小共模电压波动。

🏷 关键词

📄 原文摘要

Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 *Equally Credited Authors (ECAs) Isolated DC-DC converters [1-8] with low electromagnetic interference (EMI) are crucial for system safety and reliability in harsh industrial environments. Typically, input-to-output dipole radiation caused by the common-mode (CM) current ICM across the isolation barrier leads to EMI issues (Fig. 32.1.1) [9]. A common practice to reduce dipole radiation is to suppress the variation of CM voltages (∆VCM) on the transformer [1,2], which is achieved by fully symmetrical transmitter (TX) topologies. Meanwhile, a transformer pair with coils routed in opposite directions cancels magnetic field, further improving EMI performance

👥 作者与机构

Tian Xia*1, Qiujin Chen*1, Shujing Wang1, Rui P. Martins1,2, Mo Huang1

University of Macau, Macau, China