48VDC to 48VDC 0.5A PoE supply

[nikhillife11]

Hello All,

I want to build a PoE adaptor whose input is from a 48V / 2A battery and the output current from the PoE port should be not more than 0.5A.

Basically
Input : 48V /2A
Output: 48V / 0.5A

Can anyone guide me on the same

Regards
Nikhil

 

[xbased]

Use 2 pairs for data, the 2 remaining pairs for the DC power.

Pins 1-2-3-6 have to be used for data on both ends.

 

[nikhillife11]

Use 2 pairs for data, the 2 remaining pairs for the DC power.

Pins 1-2-3-6 have to be used for data on both ends.

Thanks for the reply buddy But,

I want help with designing the 48V to 48V/0.5A supply. I need help with that

Regards
Nikhil

 

[xbased]

So you need help designing the power supply circuit limiting the 48v/2A to 48v/0.5A?

Maybe it helps:
http://www.dz863.com/circuits-26-83...-from-24V-to-96V-Input-Application-Schematic/

 

[nikhillife11]

Hey Xbased,

Thanks for the help. Also can you help me with what magnetics (PoE Transformer) that I can use for GE ports actually.

Regards
Nikhil

- - - Updated - - -

Hey Xbased,

Thanks for the help. Also can you help me with what magnetics (PoE Transformer) that I can use for GE ports actually.

Regards
Nikhil

 

[xbased]

Check these:

http://www.silvertel.com/DataSheets/Complementary Products/Magnetics/Pulse/H2019.pdf
http://www.abracon.com/Magnetics/lan/ARJP11C.PDF
**broken link removed**

 

[tantudaisu]

So you need help designing the power supply circuit limiting the 48v/2A to 48v/0.5A?

Maybe it helps:
http://www.dz863.com/circuits-26-83...-from-24V-to-96V-Input-Application-Schematic/

1. What would be the duty cycle of such circuit?
2. How to calculate flyback transformers inductance (mH), when using 1:1 ?

-- tantudaisu --