Datasheet
LT3497
7
3497f
BLOCK DIAGRAM
Figure 1. LT3497 Block Diagram
–
+
–
+
–
+
8
OVERVOLTAGE
PROTECT
RAMP
GENERATOR
START-UP START-UP
2.3MHz
OSCILLATOR
R
R
Q
S
V
IN
9
SW1
Q1
CAP1
1
2
LED1
R
A3
A = 6.25
+
–
+
A11.25V 1.25V
CTRL1 CTRL2
3497 F01
R
C
R
C
C
C
C
C
C
OUT1
1µF
C
IN
1µF
L1
15µH
L2
15µH
g
m
AMP g
m
AMP
CONVERTER 1 CONVERTER 2
A2
10
R
SENSE1
10Ω
–
+
–
+
–
+
OVERVOLTAGE
PROTECT
R
R
Q
S
Q2
DRIVERDRIVER
5
4
GND
3
R
LED2
CAP2
A3
+
–
+
A2
6
SW2
7
A1
C
OUT2
1µF
R
SENSE2
10Ω
A = 6.25