Hello,
My customer has the following issue. LM5020-20 is used as a buck converter, 48Vdc to 3.3Vdc. The 48Vdc VIN is also used for Power over Ethernet out RJ45 port. The board fails EN55032 Telco Conducted emissions tests at the 239KHz, the same frequency as the switching rate of the LM5020. In order to pass the emissions test the noise from VIN needs to be removed. The customer is providing schematic and layout which I can PM.
Thank you for your support!
Errol Leon
Texas Instruments
Field Application Engineer
