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SN65DSI86: Common mode choke

Roy Hsu
Genius 9390 points
Part Number: SN65DSI86

Hi Team,

Would you suggest to add common mode chokes at the eDP output of SN65DSI86? My understanding is that DP has relatively larger tolerance on intra-pair skew and therefore a common mode choke might not be required.

Thanks!

Roy

  • 0
    TI__Guru**** 177241 points

    Roy

    The common mode choke is to suppress the common mode noise with the added benefit of compensating for the inter-pair skew. So they need to see how much noise is on the eDP output and whether they need to use the choke to suppress it. 

    They can co-lay the choke with 0-ohm resistor and choose to populate/not populate depending on the system testing result.

    Thanks

    David