共输入电压的DC/DC变换器差频干扰  

Beat note interference of multiple DC/DC converters with the same input

作　　者：滕俊青 丁宇 刘松 张之也 

机构地区：[1]万代半导体元件(上海)有限公司,上海200070

出　　处：《电子技术应用》2011年第8期66-68,共3页Application of Electronic Technique

摘　　要：探讨了多路共输入的DC/DC变换器产生差频噪声干扰问题,通过SIMPLIS仿真进一步分析了差频产生的原因。给出了相应的抑制差频噪声的不同方法。通过优化PCB板的布局,降低近场的耦合,减小了差频噪声;使用锁相环同步每路的DC/DC变换器,可消除差频噪声。最后,给出相应的测试结果和波形。The reason of beat note noise interference produced by multiple DC/DC converters with the same input is discussed. The reason of producing beat note is analyzed using SIMPLIS emulation software. At the same time, the methods of how to suppress beat note noise are given. To optimize PCB layout is helpful to reduce near-field coupling and so beat note noise is reduced. Using phase-locked loop to synchronize multiple DC/DC converters can also eliminate beat note noise. Finally, relevant test results and waveforms are shown in the article.

关 键 词：差频 干扰 锁相环 

分 类 号：TM46[电气工程—电器]