Datasheet

MAX5922
+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 (25kΩ AND 0.1µF)
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 (25kΩ AND 10µF)
MAX5922 toc21
100ms/div
0V
0V
5V/div
0A
250µA/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
= 0.5Ω ±1%,
UVLO floating, R
RCL
= 150kΩ, R
RDT
= 18.2kΩ, T
A
= +25°C, unless otherwise noted.)
ZERO-CURRENT HIGH-TO-LOW
DETECTION TIME
MAX5922 toc16
100ms/div
0V
20V/div
0V
5V/div
0V
5V/div
0A
1.25mA/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