2 Replies Latest reply on Jan 21, 2013 1:53 AM by jenny.chiang

    common mode filtering and esd protection

    laim.maskey

      Hi,

         

      Do I need to include common mode filtering on the USB 3 SS data lines to reduce EMI? Also will I need to include ESD protection on the same data lines?

         

      Sodafarl

        • 1. Re: common mode filtering and esd protection
          hussein.osman

          Hi,

             

          We have tested our device for EMI without extenal chokes. We are able to pass FCC class B limits without the chockes.But there are devices in the market for USB 3.0 EMI filtering such as DLP11TB800UL2 from Murata.

             

          For ESD there are many devices in the market that does not severly impact the 5Gbps USB signals. Little Fuse (SP3010-04UTG) and Amazing Devices (AZ1065) have devices with low capacitance (.05pF) that can be used for this application.

             

          Regards,

             

          Hussein

          • 2. Re: common mode filtering and esd protection
            jenny.chiang

            Hi,

               

            Our company (Inpaq Technology) offers both ESD and EMI solution for USB 3.0. TCF0504U500 is a good EMI filtering choke for USB 3.0 and TVU1206 is a ESD component with very low capacitance which keeps good signal performance in USB 3.0.