lt3573 Linear Technology Corporation, lt3573 Datasheet - Page 6

• Manufacturer Part Number: lt3573
• Description: Isolated Flyback Converter Without An Opto-coupler
• Manufacturer: Linear Technology Corporation

LT3573
BLOCK DIAGRAM
6
V
IN
R1
R2
C3
R6
R4
C5
TC
R
BIAS
SHDN/UVLO
SS
CURRENT
REF
TC
C1
Q4
1.22V
Q3
2.5μA
V
+
–
IN
A5
I2
20μA
Q2
R
REGULATORS
FB
REFERENCE
INTERNAL
AND
1.22V
R3
FLYBACK
ERROR
–
+
AMP
g
m
I1
7μA
COMPARATOR
CURRENT
–
+
A1
S
S
MASTER
OSCILLATOR
LATCH
SHOT
ONE
R
Q
DRIVER
120mV
R
A2
A4
BIAS
V1
ILIM
–
+
–
+
R5
L1A
V
IN
+
–
Q1
N:1
T1
R
0.02Ω
SW
SENSE
L1B
D1
GND
3573 BD
V
C
C2
V
V
R7
OUT
OUT
C4
+
–
3573f