LT1425 Linear Technology, LT1425 Datasheet - Page 6

• Manufacturer Part Number: LT1425
• Description: Isolated Flyback Switching Regulator
• Manufacturer: Linear Technology

BLOCK
FLYBACK ERROR A PLIFIER DIAGRA
LT1425
6
SHDN
SYNC
DIAGRAM
V
IN
OSCILLATOR
REGULATOR
W
285kHz
2.6V
V
IN
D2
W
Q1
R
R
SGND
R
R
FB
REF
FB
REF
Q2 Q3
GND IS OMITTED FOR CLARITY
I
V
IN
LOGIC
COMP
V
SW
Q4
V
BG
•
T1
I
M
•
I
M
D1
W
+
I
FXD
AMPLIFIER
V
FLYBACK
ERROR
C1
C
V
COMPENSATION
C
LOAD
C
EXT
R
ISOLATED
REF
V
OUT
+
–
R
DRIVER
OC0MP
AMPLIFIER
CURRENT
ENABLE
R
CCOMP
1425 EA
+
–
R
FB
R
PGND
V
SENSE
1425 BD
SW