Datasheet

LT3825
9
3825fe
FLYBACK FEEDBACK AMPLIFIER
S
R
Q
+
–
V
FB
1.237V
ENABLE
COLLAPSE
DETECT
1V
LT3825 FEEDBACK AMP
FB
R1
R2
–
+
8
9
V
C
V
IN
PRIMARY
FLYBACK
SECONDARY
•
•
•
MP
T1
V
FLBK
MS
C
VC
3825 FFA
C
OUT
ISOLATED
OUTPUT
TIMING DIAGRAM
PRIMARY SIDE
MOSFET DRAIN
VOLTAGE
PG VOLTAGE
SG VOLTAGE
V
IN
t
ON(MIN)
ENABLE
DELAY
MIN ENABLE
FEEDBACK
AMPLIFIER
ENABLED
PG DELAY
3825 TD
V
FLBK
0.8 • V
FLBK