Rainbow Electronics MAX5971B - Manual (Page 10)

10 _____________________________________________________________________________________
MAX5971B
Single-Port, 40W, IEEE 802.3af/at,
PSE Controller with I 2 C
Typical Operating Characteristics (continued)
(T A = +25°C, unless otherwise noted.)
CLASSIFICATION WITH DIFFERENT PD CLASSES
(4 AND 5)
MAX5971B toc20b
40ms/div
0V
0mA
V
AGND
- V
OUT
10V/div
I OUT
20mA/div
CLASS 5
CLASS 4
CLASSIFICATION WITH DIFFERENT PD CLASSES
(0 TO 3)
MAX5971B toc20a
40ms/div
0V
0mA
V
AGND
- V
OUT
10V/div
I OUT
10mA/div
CLASS 3
CLASS 2
CLASS 1
CLASS 0
DETECTION IN OUTPUT SHORTED TO AGND
MAX5971B toc19
40ms/div
0V
0mA
V AGND - V OUT
5V/div
I OUT
1mA/div
DETECTION IN MIDSPAN WITH INVALID PD (33kΩ)
MAX5971B toc18b
400ms/div
0V
0mA
V AGND - V OUT
5V/div
I OUT
1mA/div
DETECTION IN MIDSPAN WITH INVALID PD (15kΩ)
MAX5971B toc18a
400ms/div
0V
0mA
V AGND - V OUT
5V/div
I OUT
1mA/div
STARTUP IN MIDSPAN WITH A VALID PD
MAX5971B toc17
100ms/div
0V
0mA
V AGND - V OUT
20V/div
I OUT
100mA/div