Datasheet

LTC4267
21
4267fc
APPLICATIO S I FOR ATIO
WUUU
Figure 11. Typical LTC4267 Application Circuits
P
VCC
P
VCC
P
VCC
V
PORTP
R
CLASS
SIGDISA
V
PORTN
I
TH
/RUN
LTC4267
NGATE
SENSE
V
FB
R3
D1
D2
C
OUT
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
P
OUT
C1
L
SEC
L
PRI
L
BIAS
C
PVCC
C
C
V
OUT
4267 F11
R
SENSE
R
SL
R
START
R2
R1
Q1
T1
R
CLASS
P
VCC
V
PORTP
R
CLASS
SIGDISA
V
PORTN
I
TH
/RUN
LTC4267
NGATE
SENSE
V
FB
D1
C
OUT
0.1µF
100V
0.1µF
100V
PGND
PGND
PGND
PGND
P
OUT
C1
L
SEC
L
PRI
C
PVCC
V
OUT
R
SENSE
R
SL
R
START
Q1
R2
R1
R
LIM
–48V
FROM
DATA PAIR
–48V
FROM
SPARE PAIR
R
CLASS
V
PORTP
V
PORTP
V
PORTN
T1
C
ISO
OPTOISOLATOR
C
C
R
C
ERROR
AMPLIFIER
ISOLATED DESIGN EXAMPLE
NONISOLATED DESIGN EXAMPLE
+
+
–48V
FROM
DATA PAIR
–48V
FROM
SPARE PAIR
+
+