DS90UB933-Q1: Power over twisted pair (PoDL) instead of PoC?

Eric Raquette

Part Number: DS90UB933-Q1

Hello

You have application notes and info in datasheets etc for PoC.

Should it not also be possible to put power over a twisted pair since the data is AC coupled with capacitors?

As done for single pair ethernet 1000BASE-T1 with PoDL.

0 Hamzeh Jaradat over 6 years ago

Hello Eric,

are you using Coax or STP cable with the UB933?

0 Eric Raquette over 6 years ago in reply to Hamzeh Jaradat

Hello Hamzeh

We are using RG178 Coax without power on the first HW version (prototype, working good).

But I want to change to STP since it is easier to get a custom cable done (over moulded with 6 other wires).

And the Coax connector I chose (MMCX) was not so good, there are short loss of link when moving the cable.

Clock frequency 37.5 MHz, short distance (1 meter).

0 Hamzeh Jaradat over 6 years ago in reply to Eric Raquette

Hello Eric,

please check the 913-914 EVM User's Guide under this link. On page 15 you can find how we did implement the Power-over-STP in this design.

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