+48V, Single-Port Network Power Switch
For Power-Over-LAN
_______________________________________________________________________________________   7
OVERCURRENT RESTART DELAY
MAX5922 toc19
400ms/div
0V
20V/div
0V
5V/div
0A
500mA/div
0V
5V/div
V
OUT
POK
I
OUT
FAULT
t
RESTART
STARTUP WITH VALID
PD (25k& AND 0.1礔)
MAX5922 toc20
40ms/div
0V
20V/div
0V
5V/div
0V
5V/div
0A
200mA/div
V
OUT
POK
I
OUT
EN
STARTUP WITH INVALID
PD (25k& AND 10礔)
MAX5922 toc21
100ms/div
0V
0V
5V/div
0A
250礎/div
0V
2V/div
V
OUT
POK
I
OUT
EN
Typical Operating Characteristics (continued)
(MAX5922A, V
IN
= 48V, V
DIG
, EN, LATCH, CLASS, and ZC_EN = 3.3V, DCA, AGND_S = AGND = DGND = 0V, R
SENSE
= 0.5& ?%,
UVLO floating, R
RCL
= 150k&, R
RDT
= 18.2k&, T
A
= +25癈, unless otherwise noted.)
ZERO-CURRENT HIGH-TO-LOW
DETECTION TIME
MAX5922 toc16
100ms/div
0V
20V/div
0V
5V/div
0V
5V/div
0A
.25mA/div
V
OUT
POK
ZC
I
OUT
t
ZCDEL
ZERO-CURRENT (IIms GLITCH)
DEGLITCH TIME
MAX5922 toc17
100ms/div
0V
20V/div
0V
5V/div
0V
5V/div
0A
200mA/div
V
OUT
POK
ZC
I
OUT
t
ZCDEL
GLITCH > t
ZC_DEG
ZERO-CURRENT
DEGLITCH TIME (10ms GLITCH)
MAX5922 toc18
100ms/div
0V
20V/div
0V
5V/div
0V
5V/div
0A
200mA/div
V
OUT
POK
ZC
I
OUT
t
ZCDEL
GLITCH > t
ZC_DEG
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