• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 772 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Transformer-less Ethernet PHY and POE issues

Dominick Squillace
Prodigy 20 points

Hello,

I have an application that is currently using a transformer-less setup to create the galvanic isolation required for interfacing with the Ethernet PHY. (using 1uf caps)

The issue we are having is when we connect a POE switch to this port it is damaging the PHY. 

I have seen some application notes from TI on transformer-less ethernet but have not seen anything that concerns POE switches.

It is from my understanding that the POE switches can send a detection signal which I believe may be causing the issues.

Does TI have any suggestions with how to implement transformer-less Ethernet PHYs that are compatible with POE switches?

Thanks,

Dom