Buck电源电路的板级EMI设计  

Board Level EMI Design of Buck Power Supply Circuit

作　　者：俞波 YU Bo(Mianyang Kexingyuan Electronic Co.,Ltd.,Mianyang Sichuan621000,China)

机构地区：[1]绵阳市科兴源电子有限公司,四川绵阳621000

出　　处：《机电产品开发与创新》2023年第3期42-45,共4页Development & Innovation of Machinery & Electrical Products

摘　　要：Buck(降压型斩波变换)电源电路作为开关电源的一种常见形式,广泛应用于各类电子产品的电源设计,DC/DC开关过程中产生的电压和电流突变,是引起电磁骚扰EMI(Electromagnetic Interference)问题的两种典型噪声源。为满足相应产品的EMI技术法规,需根据Buck电路拓扑自身结构特点,从板级进行噪声抑制并切断其耦合路径行,以显著降低对外电磁辐射水平。Buck(Buck chopper converter)power supply circuit,as a form of switching power supply,is widely used in the power supply design of various electronic products.The sudden changes of voltage and current generated in the switching process of dc-dc chips are two typical noise sources that cause EMI(electromagnetic interference)problems.In order to meet the EMI technical regulations of corresponding products,it is necessary to conduct noise suppression and cut off the coupling path from board level according to the structural characteristics of the Buck circuit topology,so as to significantly reduce the external electromagnetic radiation level.

关 键 词：寄生参数 滤波 环路面积 信号边沿时间 振铃 

分 类 号：TN03[电子电信—物理电子学]