Datasheet

MAX5922
+48V, Single-Port Network Power Switch
For Power-Over-LAN
_______________________________________________________________________________________ 9
STARTUP WITH VALID PD
(25kΩ, ZC_EN = LOW)
MAX5922 toc28
100ms/div
0V
0V
5V/div
20V/div
0A
1.25mA/div
0V
V
OUT
I
OUT
POK
EN
STARTUP WITH
DIFFERENT PD CLASSES
MAX5922 toc29
40ms/div
0V
0V
0V
5V/div
5V/div
20mA/div
0A
V
OUT
I
OUT
POK
EN
SHORT TO AGND
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
OVERCURRENT TIMEOUT
(R
LOAD
FROM 240Ω to 75Ω)
MAX5922 toc30
2ms/div
5V/div
20V/div
200mA/div
V
OUT
I
OUT
POK
OUTPUT SHORT-CIRCUIT RESPONSE
MAX5922 toc31
200µs/div
200mA/div
20V/div
V
OUT
I
OUT
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.)
OUTPUT SHORT-CIRCUIT RESPONSE
MAX5922 toc32
4µs/div
10A/div
20V/div
V
OUT
I
OUT