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Please see my response below.
Thanks for your inputs.
Item 4 Max column shows “1,2,3,4”.
This is PSE Type?
Yair: Yes it is PSE.
In truth, according to Figure 33-14, there is a maximum possible Icon that is Ilim_min.
Yair: Icon is Icut_min and not Ilim_min. In addition Figure 33-14 is going to be changed for much clearer description of the relationship between the different parameters.
The minimum Icon is the PSE lowerbound template for continuous current, i.e. after Tcut.
In the text, the phrase “normal POWER ON state” seems vaguely defined.
Yair: POWER_ON state is defined state. It is normal powering without faults i.e. ovld and short circuit.
Is this specifically a condition where the PD is operating within its allowed steady-state power budget meaning the PSE is operating at or below the lowerbound template for continuous current ?
Specifying Icont-2P-unb MAXIMUMS of 668 mA for Type-3 and 931 mA for Type-4 seems confusing. A Type-2 PSE today can furnish up to 684 mA continuously (with or without pair-pair unbalance) and meet the template in Figure 33-14. That is higher than 668 mA, of course. Again, this may tie back to a PSE operating at or below the lowerbound template – that would represent the constraint in order for 668 mA to be a Type-3 maximum pair set current.
Yair: Type 2 684mA could possibly be the constrain to the 668mA Type 3. However Drawing 33-14 is parametric and per PSE type as the whole table 33-11.
Moreover, all numbers for Type 3 and 4 are not final so I suggest to keep this comment after finalizing all numbers and Figure 33-14.
Food for thought….
Please review for the meeting tomorrow.
Power over HDBaseT Subcommittee
Chief R&D Engineer
Analog Mixed Signal Group
1 Hanagar St., P.O. Box 7220