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TPS23841 System Block Diagram
3
6
1
2
4
5
7
8
RJ-45
W/GRN
GRN
W/ORG
ORG
BLUE
W/BLUE
W/BRN
BRN
568A
3
6
1
2
4
5
7
8
RJ-45
W/GRN
GRN
W/ORG
ORG
BLUE
W/BLUE
W/BRN
BRN
568A
TX
RX
RX
TX
SWITCH/HUB POWERED DTE
PD
SIGNATURE
PD
DC-DC
SUPPLY
48V
SUPPLY
UP TO 350ft
CATEGORY 5 CABLE
MSP430
CONTROLLER
+
-
PPTC
FUSE
TPS23841
PSE
(1PORT)
P
V48
GND
N
OpticallyCoupled
I2C SerialBus
CT CHOKE
CT CHOKE
CT CHOKE
CT CHOKE
RET
TPS23841
SLUS745A – NOVEMBER 2006 – REVISED MAY 2007
NOTE: A fuse may be required to provide additional protection if isolation is lost or the low-side current sense fails.
Figure 18.
39
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