LT3474/LT3474-1
7
3474fd
BLOCK DIAGRAM
BIAS
V
C
V
ADJ
OUT
3474 BD
C1
R
T
PWM
GND
2V
REF
R
T
∑
DRIVER
SHDN
C
C1
C
C2
R
C
1.25k
D
LED1
Q2
Q1
1.25V
OSC
SLOPE
COMP
FREQUENCY
FOLDBACK
INT REG
AND
UVLO
R
Q
Q
S
C
IN
V
IN
V
IN
–
+
0.1Ω100Ω
LED
D1
L1
SW
BOOST
C2
PWM
USE WITH
PWM DIMMING
C1
g
m
7
6
5
2
3
12
8
14
11
10
9
4
13
Figure 1. Block Diagram
