• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 306 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.

TPS2378: Can I power up TPS2378 from a passive POE which is not 802.3af/at compliant?

SUJIT GHOSH
Prodigy 30 points
Part Number: TPS2378

I am designing a switch which is POE powered. If a customer connects a passive POE injector which is not 802.3af/at PSE compliant, will TPS2378 power up? If not, if TI has any other device which can work from a standard-compliant POE PSE as well as passive  POE injector, it will be very helpful.

  • +1
    TI__Mastermind 21320 points

    Hello, 

    My understanding of a passive PoE injector is one that always outputs power with no negotiation. If power is applied to the input, our devices will work. For example, we use a DC power supplies that injects power into an ethernet cable. So it should work. 

    The only thing to be careful is that the power ramp can be very quick, so ensuring that the proper filter caps and overvoltage protections are in place is important. 

    If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

     

    Regards, 

     

    Michael P.

    Applications Engineer

    Texas Instruments