ltc4267-3 Linear Technology Corporation, ltc4267-3 Datasheet - Page 22

• Manufacturer Part Number: ltc4267-3
• Description: Power Over Ethernet Ieee 802.3af Pd Interface With Integrated 300khz Switching Regulator
• Manufacturer: Linear Technology Corporation

LTC4267-3
APPLICATIO S I FOR ATIO
22
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 LTC4267-3 Application Circuits
V
V
PORTP
PORTN
0.1µF
100V
R
CLASS
U
NONISOLATED DESIGN EXAMPLE
R
CLASS
ISOLATED DESIGN EXAMPLE
C
V
R
SIGDISA
V
I
R
C
TH
PORTP
PORTN
P
CLASS
START
OUT
/RUN
LTC4267-3
PGND
P
VCC
V
R
SIGDISA
V
I
P
R
TH
NGATE
SENSE
PORTP
PORTN
P
PGND
CLASS
VCC
START
OUT
/RUN
LTC4267-3
V
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
PVCC
R
PGND
R
SENSE
R2
L
•
SL
L
BIAS
PRI
OPTOISOLATOR
L
SEC
D1
•
•
T1
C
Q1
R
PGND
ISO
SENSE
•
L
SEC
C
D1
OUT
AMPLIFIER
ERROR
PGND
C
OUT
R
LIM
V
42673 F11
C
OUT
C
R2
R1
V
OUT
42673f