TPS23731: PoE+ forwaring or daisy chain devices

marco mazzali

Part Number: TPS23731
Other Parts Discussed in Thread: TPS23861,

Tool/software:

Hi, i'm looking to design a daisy chain poe+ system also known as poe forwarding a think, to have the possibility to connect series up to 10 devices and have on each the ethernet connection and the power.

i have read old thread on the disign support where it seems there was an apllication disegn or hw example with PSE e PD to use.

Could you tell me where can i get it?

thanks

Marco

10 months ago

+1 Diang Xing 10 months ago

TI__Mastermind 37111 points

Hi Marco,

Thanks for reaching out!

A daisy chain structure could be like below structure (TPS23731 is 25.5W rated PD. TPS23861 is PSE with autonomous mode, it and output max 30W power by default in autonomous mode). But in general a 10 devices system could have significant voltage drop on Ethernet cable, and each unit could only consume 2.5W power in average. Do you need boost the input current of PD to make sure there are enough voltage for PSE? And is 2.5W enough in your case?

Best regards,

Diang

0 marco mazzali 10 months ago in reply to Diang Xing

Prodigy 10 points

Thanks Diang,

it seems the idea i have thought..

Bye

0 Diang Xing 10 months ago in reply to marco mazzali

TI__Mastermind 37111 points

Hi Marco,

You are welcome! I will close this thread for now. Let me know if you have further questions or concerns.

Best regards,

Diang

Power management

Power management forum

TPS23731: PoE+ forwaring or daisy chain devices