Datasheet

MAX5942A/MAX5942B
IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
______________________________________________________________________________________ 21
PHY
GND
DF02SADF02SA
-48V
VREG
TX
RX
RJ-45
POWER-OVER
SPARE PAIRS
3
6
1
2
4
5
7
8
** R1 AND R2 ARE OPTIONAL AND WHEN USED, THEY MUST TOTAL TO 25.5kΩ AND REPLACE THE 25.5kΩ RESISTOR.
* OPTIONAL.
POWER-OVER
SIGNAL PAIRS
+
-
+
-
NDRVGNDV+
V
DD
V
CC
60V
SMBJ58CA
GND
-48V
RCL
**R2
**R1
UVLO
GATE
V
EE
C
GATE
*
CS
V-
SS_SHDN
PGOOD
PGOOD
FB
OUT
VREG
MAX5942
R
DISC
=
25.5kΩ
68nF
Figure 8. PD with Power-Over-Ethernet (Power is Provided by Either the Signal Pairs or the Spare Pairs)