Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
Typical Operating Characteristics (continued)
(V AGND = 32V to 60V, V EE = V DGND = 0V, T A = -40 N C to +105 N C. All voltages are referenced to V EE , unless otherwise noted. Typical
values are at V AGND = 54V, T A = +25 N C, ENDPOINT mode, and default register settings with a Class 0 PD, unless otherwise noted.)
DETECTION IN MIDSPAN MODE WITH
INVALID PD (33k I AND 0.1μF)
MAX5980 toc20b
DETECTION WITH OUT_ SHORTED
TO AGND
MAX5980 toc21
V AGND - V OUT_
5V/div
0V
V AGND - V OUT_
5V/div
0V
I OUT_
1mA/div
0mA
0mA
I OUT_
1mA/div
0V
V GATE_
10V/div
0V
400ms/div
CLASSIFICATION WITH CLASS
0 TO 3 PDs
MAX5980 toc22
CLASS 3
V AGND - V OUT_
10V/div
0V
40ms/div
2-EVENT CLASSIFICATION WITH CLASS
4 AND 5 PDs
MAX5980 toc23
CLASS 5
V AGND - V OUT_
10V/div
0mA
CLASS 2
CLASS 1
CLASS 0
40ms/div
I OUT_
10mA/div
0mA
CLASS 4
40ms/div
I OUT_
20mA/div
11
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