LT3003
TYPICAL APPLICATIONS
1.05A Buck Mode LT3003 with the LT3476
PV IN
32V
D1
V IN
3V TO 16V
4.7 μ F
35V
1 μ F
5
D2
20V
4
7
37
REF
V ADJ1
18
SHDN
33
V IN
CAP1
LED1
C1
1 μ F
3
2
R1
0.1 ?
LED
LED
LED
LED
1
2
LED1
LED2
V IN
LT3003
V MAX
SHDN
V EE
9
10
C2
0.33 μ F
L1
10 μ H
3
LED3
6
R3
21k
R T
LT3476
PWM1
SW1
SW1
V C1
35
29
28
1
LED LED
8 LEDs PER STRING;
350mA PER STRING
PWM
6
OT1
7
OT2
8
GND
11
3003 TA02a
GND
39
NC
19-21,
30-32
1nF C1: TDK C1608X7R1C105K
C2: TAIYO YUDEN GMK212BJ334MG-T
D1: DIODES INC. DFLS140
L1: TOKO A916CY-100M-P3
LED: LUMILEDS LUXEON
Ef?ciency
90
85
80
75
70
65
60
0
PV IN = 33V
NUMBER OF LEDS = 8 × 3 = 24
200 400 600 800
1000
1200
TOTAL LED CURRENT (mA)
3003 TA02b
3003fa
10
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