Linear Technology LT3755 Quick Start Manual page 10

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1268A-A, 1268A-B
PVIN 9V to 36V
R1
499k
SD
R4
84.5k
CTRL
PWM
R18
10k
100pF
4.7uF
Figure 8. DC1268A-B Customized SEPIC Schematic with PWM Dimming and Aluminum Electrolytic Capacitors
C1, C10
R2
2x 47uF
0 ohm
50V
C4
1uF
50V
8
6
SD/UV VIN
1
VREF
U1
LT3755EUD-1
16
CTRL
2
PWM
3
SYNC
C8
7
INTVCC
C5
SS VC
4 15
10V
C7
R17
51k
0.01uF
C6
22nF
HIGH VOLTAGE LED CONTROLLER
Ccoup
L1 22uH
CDRH127/LD 270uF 50V
Q2
Si7454DP
10
GATE
9
SENSE
RS1
0.0165
12
FB
14
ISP
13
ISN
11
PWMOUT
GND RT
17 5
R8
30.9k
350kHz
RS2
D1
PDS3100 Cout 0.10
6x 47uF
L2
50V
33uH
CDRH8D43
R6
732k
R9
24.9k
R3
0 Ohm
35V 1A
LED+
LED-
BOOST
Si2318DS
Q1
10