1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Conducted EMC problem is common mode problem is due to common mode emissions?

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by Flyback, May 15, 2017.

  1. Flyback

    Flyback Well-Known Member

    Joined:
    Jan 5, 2007
    Messages:
    2,010
    Likes:
    34
    Hello,
    Our 30W, Offline, Power factor corrected LED driver has failed Conducted EMC in the Live connection. (it does NOT use any Switch Mode Power supplies, just controlled linear current regulators.)
    It has actually passed conducted EMC in the Neutral connection.
    (the EMC scans are attached.)
    We take it that this means that the problem is a common mode conducted problem, and that we need a common mode choke?
    The strange thing is that we have a similar product that operates at 150W. –Its Live and Neutral conducted EMC plots are the same.
     

    Attached Files:

Share This Page