+48V Quad Hot-Swap Controllers For
Power-Over-LAN
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CSP
_ = V
CC
= +48V, V
DD
= +3.3V, V
RLY
= +12V, V
AGND
= V
DGND
= 0V, RTIM = open, T
A
= +25癈, unless otherwise specified.)
CURRENT-LIMIT FOLDBACK
(V
CC
= +72V)
MAX5913A/14A toc16
0
A
B
0
C
0
10ms/div
RLYON = V
DD
, R
L
= 200&, R
RTIM
= 40k&
A: V
ON
, 5V/div
B: V
OUT
, 10V/div
C: I
OUT
, 200mA/div
CURRENT-LIMIT FOLDBACK
(V
CC
= +57V)
MAX5913A/14A toc17
0
0
A
B
C
0
10ms/div
RLYON = V
DD
, R
L
= OPEN,
R
RTIM
= 40k&, C
LOAD
= 470礔
A: V
ON
, 5V/div
B: V
OUT
, 10V/div
C. I
OUT
, 200mA/div
OVERCURRENT DELAY
(EXPANDED TIME SCALE)
MAX5913A/14A toc20
0
A
B
0
1ms/div
RTRYEN = V
DD
, RLYON = ON = V
DD
,
DC = DON'T CARE, R
RTIM
= 2k&, R
L
= 100&
A: V
GATE
, 20V/div
B: I
OUT
, 200mA/div
OVERCURRENT DELAY
MAX5913A/14A toc19
0
A
B
0
20ms/div
RTRYEN = V
DD
, RLYON = ON = V
DD
, DC = 4%,
R
RTIM
= 2k&, R
L
= 100&
A: V
GATE
, 20V/div
B: I
OUT
, 200mA/div
CURRENT-LIMIT FOLDBACK
(V
CC
= +72V)
MAX5913A/14A toc18
0
A
C
0
20ms/div
RLYON = V
DD
, R
L
= OPEN, R
RTIM
= 40k&, C
LOAD
= 470礔
A: V
ON
, 5V/div
B: V
OUT
, 20V/div
C: I
OUT
, 200mA/div
B
0
SHORT-CIRCUIT RESPONSE
(V
CC
= +48V)
MAX5913A/14A toc21
0
A
B
0
1ms/div
ON = RLYON = V
DD
, R
L
= 1&, R
RTIM
= 2k&
A: I
OUT
, 200mA/div
B: V
GATE
, 20V/div
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