A 1.2W 51%-Peak-Efficiency Isolated DC-DC Converter with a Cross-Coupled Shoot-Through-Free Class-D Oscillator Meeting the CISPR-32 Class-B EMI Standard

📋 论文概要

本文提出了一种1.2W、峰值效率51%的隔离DC-DC转换器，采用交叉耦合无直通Class-D振荡器，从源头降低EMI，无需传统4层PCB和缝合电容，降低了系统成本和PCB布局难度。

💡 主要创新点

• 提出交叉耦合无直通Class-D振荡器，消除直通电流，提高效率并降低EMI。
• 通过电路技术从源头抑制共模电流，无需多层PCB和缝合电容即可满足CISPR 32 Class-B EMI标准。

🏷 关键词

📄 原文摘要

interference (EMI) is essential for isolated DC-DC converters that are used in the harsh industrial environments. To pass the CISPR 32 Class-B EMI standard, a 4-layer PCB with a stitching capacitor implemented by the internal layers is commonly required [1], which greatly increases the cost of the system and the effort of PCB layout. Therefore, low-cost circuit techniques that can reduce EMI at the source are highly desirable. As shown in Fig. 14.7.1, input-to-output dipole radiation caused by the common-mode (CM) current ICM across the parasitic capacitance CP of the isolation barrier is the predominant mechanism of EMI, and the fluctuation of the CM voltages of the transformer at the primary and the secondary side, VCM_PRI and VCM_SEC, should be

👥 作者与机构

Dongfang Pan1, Guolong Li1, Fangting Miao1, Wei Sun1, Xiaohan Gong2,

Lele Zhang2, Lin Cheng1 University of Science and Technology of China, Hefei, China Suzhou Novosense Microelectronics, Suzhou, China 1 2 Low electromagnetic