Rainbow-electronics MAX5971B Manual do Utilizador descarregar pdf (Página 18)

18 _____________________________________________________________________________________

MAX5971B

Single-Port, 40W, IEEE 802.3af/at,

PSE Controller with I

2

C

Figure 1. Detection, Classification, and Port Power-Up Sequence

Figure 2. Detection, 2-Event Classification, and Port Power-Up Sequence

V

OUT

t

0V

-4V

-9.3V

-18V

-54V

t

DET(1)

t

DET(2)

t

CLASS

80ms

150ms 150ms 19ms

V

OUT

t

0V

-4V

-9.3V

-18V

-54V

t

DET(1)

t

DET(2)

t

CLASS(1)

t

CLASS(2)

80ms

150ms 150ms

19ms

19ms

9ms

9ms

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 45 46

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