TPS2373: Adapter Priority for 48V

Kuan Wei Chen (Kevin Chen)

Genius 9710 points

Part Number: TPS2373

Dear Team

Do we have reference design with 48V adapter priority for the customer to duplicate the circuit?

Or we can only follow the below application in section 3.5?

Kevin

over 6 years ago

0 Michael Pahl over 6 years ago

TI__Mastermind 21320 points

Hello Kevin,

Thank you for your question. We do have an EVM with a 48V adapter priority: TPS2373-4EVM-758

http://www.ti.com/lit/ug/sluubj1a/sluubj1a.pdf

I have the EVM and I went to test it in the lab.

I tested the board by connecting a 58V PoE cord in the power in. Then I connected a 48V in Adapter Port, J3. I measured the voltage on VDD (TP10) and it swtiched from 58V from the PoE to 48V once it was powered. I also confirmed if there is no PoE, the board still operates on the adapter voltage alone. I also confirmed if we remove the 48V from the adapter the board still operates on the PoE alone.

The EVM has a jumper (J6) that enables adapter priority. The customer could either keep it or directly connect the ends in their design.

Does this answer your question, or is there anything else I can help with?

Regards,

Michael Pahl

0 Kuan Wei Chen (Kevin Chen) over 6 years ago in reply to Michael Pahl

TI__Genius 9710 points

Dear Michael,

Really appreciated for your help.

I will check with the customer and get back to you soon.

Kevin

0 Michael Pahl over 6 years ago in reply to Kuan Wei Chen (Kevin Chen)

TI__Mastermind 21320 points

Kevin,

Thank you so much for getting back to me.

I will mark this post as resolved, but feel free to reach out at any point or create a new thread.

Regards,

Michael Pahl

Power management

Power management forum

TPS2373: Adapter Priority for 48V