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Re: [802.3_4PPOE] PD isolation requirements - Updated presentation for comments Comment r02-119, r02-70

Hi Yair,


In my opinion there are 2 critical points in your proposal solution:


a)The voltage VPD is measured between any positive conductor of a pairset and any negative
conductor of the corresponding pairset, then it is not possible to measure current between negative pairs using VPD definition.


b)If PD dual signature ties positives together (problem #2, point d) and VPD is applied only to pairset mode A
at the negative pair of mode B the current is very higher than 30uA (for example if VPD is included in classification range).
Therefore your solution doesn’t include the possibility to join positive together in the dual signature PD.



Andrea AGNES | Tel: +39 0293517504

Analog & MEMS Group | Industrial & Power Conversion Division | IC Design Project Leader


STMicroelectronics srl

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2018-01-10 21:06 GMT+01:00 Yair Darshan <YDarshan@xxxxxxxxxxxxx>:

Hi all,

Please find updated presentation for comment r02-119 and r02-70.

Ill appreciate your inputs.



Darshan Yair

Chief R&D Engineer

Analog Mixed Signal Group

Microsemi Corporation


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