Datasheet

MAX5922
+48V, Single-Port Network Power Switch
For Power-Over-LAN
20 ______________________________________________________________________________________
Typical Application Circuits
MAX5922A/MAX5922B
DATA
LAN SWITCH
+48V IN
+48V OUT
RJ45
+48V POWER OVER
SIGNAL PAIRS
CAT5
RJ45
PD
POWERED DEVICE
(IP PHONES, WIRELESS LAN
ACCESS NODE, SECURITY
CAMERA, ETC.)
POWER SENT OVER SIGNAL PAIRS
MAX5922A/MAX5922C
MIDSPAN HUB
+48V IN
+48V OUT
RJ45
+48V POWER OVER
SPARE PAIRS
CAT5
RJ45
PD
POWERED DEVICE
(IP PHONES, WIRELESS LAN
ACCESS NODE, SECURITY
CAMERA, ETC.)
POWER SENT OVER SPARE PAIRS
CAT5
RJ45 RJ45
8
5
9
18
17
16
7
UVLO
RCL
RDT
CL0
CL1
CL2
AGND_S
AGND
11
10
12
24
20
21
22
25
19
V
DIG
POK
FAULT
ZC
CLASS
LATCH
ZC_EN
EN
DCA*
DGND
IN DRAIN OUT
4 1, 2 27, 28
MAX5922
OPEN-DRAIN
OUTPUTS
REFERENCED
TO DGND
OPEN-DRAIN OUTPUTS
REFERENCED TO DGND
680nF
R
RDT
18.2kΩ
1%
R
RCL
150Ω
1%
+48V
R
SENSE
0.5Ω
1%
48V
OUTPUT TO
PORT
OFF
ON
CONNECT DCA TO VDIG
FOR MIDSPAN MODE
NOTE: ALL SIGNAL AND DIGITAL INPUTS/OUTPUTS ARE
REFERENCED TO DGND. DGND CAN BE ±4V FROM AGND_S.
*MAX5922A ONLY. MAX5922B/MAX5922C DO NOT HAVE A DCA PIN.
0.1µF
100V
47µF
100V
1Ω
5%
1/16W
100Ω
10µF
10V
1µF
10V
V
DIG
1.65V TO 5.5V
(REF TO DGND)
B1100LB
100V, 1A