Datasheet

MAX5922
+48V, Single-Port Network Power Switch
For Power-Over-LAN
6 _______________________________________________________________________________________
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.)
DIGITAL SUPPLY CURRENT vs. V
DIG
V
DIG
(V)
I
DIG
(µA)
5.04.01.0 2.0 3.0
MAX5922toc10
4
6
8
10
12
14
16
18
20
22
24
26
28
30
0
2
06.0
OVERCURRENT TIMEOUT
(R
LOAD
FROM 240Ω TO 75Ω)
MAX5922 toc11
20ms/div
5V/div
0A
200mA/div
0V
5V/div
V
OUT
POK
I
OUT
0V
20V/div
0V
FAULT
SHORT-CIRCUIT RESPONSE TIME
MAX5922 toc12
20ms/div
5V/div
0A
200mA/div
0V
5V/div
V
OUT
POK
I
OUT
0V
20V/div
0V
FAULT
POK LOW-TO-HIGH DELAY TIME
MAX5922 toc13
100ms/div
0V
20V/div
0V
5V/div
V
OUT
POK
POK HIGH-TO-LOW DELAY TIME
MAX5922 toc14
1ms/div
0V
20V/div
0V
5V/div
V
OUT
POK
ZC TO OUT DELAY
MAX5922 toc15
400µs/div
0V
20V/div
0V
5V/div
0V
5V/div
0A
1.25mA/div
V
OUT
POK
ZC
I
OUT