LTC4267 LINER [Linear Technology], LTC4267 Datasheet - Page 21

• Manufacturer Part Number: LTC4267
• Description: Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
SPARE PAIR
DATA PAIR
FROM
FROM
–48V
–48V
SPARE PAIR
DATA PAIR
FROM
FROM
–48V
–48V
U
U
+
+
–
–
+
+
–
–
W
0.1µF
100V
Figure 11. Typical LTC4267 Application Circuits
V
V
PORTN
PORTP
0.1µF
100V
R
CLASS
U
NONISOLATED DESIGN EXAMPLE
R
CLASS
ISOLATED DESIGN EXAMPLE
C
R
V
R
SIGDISA
V
I
C
TH
PORTP
PORTN
P
START
CLASS
OUT
/RUN
LTC4267
PGND
P
VCC
V
R
SIGDISA
V
I
R
P
TH
NGATE
SENSE
PORTP
PORTN
P
PGND
CLASS
VCC
START
OUT
/RUN
V
LTC4267
FB
P
VCC
NGATE
SENSE
PGND
P
V
PGND
PGND
VCC
R3
FB
C1
C
D2
PVCC
PGND
R
SL
L
PRI
R
V
C
PORTP
R1
PGND
PGND
PGND
PGND
•
C1
C
T1
Q1
R
PVCC
PGND
R
SENSE
R2
L
•
SL
L
BIAS
OPTOISOLATOR
PRI
L
SEC
D1
•
•
T1
C
Q1
R
PGND
ISO
SENSE
•
L
SEC
C
D1
OUT
AMPLIFIER
ERROR
PGND
C
OUT
R
LIM
V
4267 F11
LTC4267
C
OUT
C
R2
R1
V
OUT
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