High-Power, Quad, PSE Controller
for Power-Over-Ethernet
_______________________________________________________________________________________ 9
FOLDBACK CURRENT-LIMIT
THRESHOLD vs. OUTPUT VOLTAGE
VOUT - VEE (V)
40
30
20
10
50
100
150
200
250
300
0
0
50
FOLDBACK CURRENT-LIMIT
THRESHOLD vs. OUTPUT VOLTAGE
VOUT - VEE (V)
40
30
20
10
50
100
200
150
250
300
350
0
0
50
DC LOAD DISCONNECT THRESHOLD
vs. TEMPERATURE
TEMPERATURE (癈)
60
35
10
-15
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
-40
85
OVERCURRENT TIMEOUT
(R
LOAD
= 240& TO 57&)
MAX5952 toc12
20ms/div
(AGND - V
OUT
)
50V/div
I
OUT
200mA/div
INT
5V/div
V
GATE_
10V/div
0V
0A
0V
V
EE
OVERCURRENT RESPONSE WAVEFORM
(MAX5952AUAX) (R
LOAD
= 240& TO 57&)
MAX5952 toc13
400祍/div
(AGND - V
OUT
)
50V/div
I
OUT
200mA/div
INT
2V/div
GATE
10V/div
0V
0A
0V
V
EE
SHORT-CIRCUIT RESPONSE TIME
MAX5952 toc14
20ms/div
(AGND - V
OUT
)
20V/div
I
OUT
200mA/div
V
GATE_
10V/div
0V
0A
V
EE
SHORT-CIRCUIT RESPONSE TIME
MAX5952 toc15
4祍/div
(AGND - V
OUT
)
20V/div
I
OUT
10A/div
V
GATE_
10V/div
0V
130mA
V
EE
Typical Operating Characteristics (continued)
(V
EE
= -48V, V
DD
= +3.3V, V
AUTO
= V
AGND
= V
DGND
= 0V, RESET = SHD_ = unconnected, R
SENSE
= 0.5&, IVEE = 00, ICUT = 000,
T
A
= +25癈, all registers = default setting, unless otherwise noted.)
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