Datasheet

MAX5941A/MAX5941B
IEEE 802.3af-Compliant Power-Over-Ethernet
Interface/PWM Controller for Power Devices
______________________________________________________________________________________ 21
PHY
GND
-48V
VREG
TX
RX
RJ-45
DF02SA
DF02SA
POWER OVER
SPARE PAIRS
3
6
1
2
4
5
7
8
*OPTIONAL.
**R1 AND R2 ARE OPTIONAL AND WHEN USED, THEY MUST TOTAL TO 25.5kΩ AND REPLACE THE 25.5kΩ RESISTOR.
POWER-OVER
SIGNAL PAIRS
+
-
+
-
NDRVGNDV+
V
DD
V
CC
68nF
60V
GND
-48V
R
DISC
25.5kΩ
RCL
RCL
UVLO
GATE
V
EE
C
GATE
*
R1**
R2**
CS
V-
SS_SHDN
PGOOD
PGOOD
OPTO
OPTOCOUPLER
TL431
OUT
V
CC
VREG
MAX5941_
Figure 7. PD with Power-Over-Ethernet (Power Is Provided by Either the Signal Pairs or the Spare Pairs)