O'Reilly logo

Power Over Ethernet Interoperability Guide by Sanjaya Maniktala

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Some PSE-Controller Design Suggestions for AT Compliance
As we can see from all the templates in Figs. 6.3 to 6.7, the logical place to set the nominal value of the current limit (ILIM) of the PSE’s pass-FET is roughly centered in the area marked “Maybe,” past the 8.3-ms marker. Specifically, this is the area between the upperbound and lowerbound templates. To guarantee the required performance, the min of the current limit spread must be assuredly above the lowerbound template (0.684 A for Type 2 and 0.4 A for Type 1) and its max must be below the upperbound template (1.75 A, but preferably 0.45 A for AF compliance as explained previously). Then we can be sure that the current limit will never get activated in the “Yes” region, and also will ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required