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LT3475/LT3475-1
TYPICAL APPLICATIONS
Step-Down 3A LED Driver
V IN
5V TO 36V
C1
4.7 μ F
D3
50V
V IN
SHDN
D4
C2
BOOST1
BOOST2
C3
L2
10 μ H
0.22 μ F
6.3V
LT3475
0.22 μ F
6.3V
L1
10 μ H
SW1
SW2
C5
C4
2.2 μ F
D1
OUT1
OUT2
LED1
D2
2.2 μ F
6.3V
6.3V
LED2
V C1
V C2
C6
0.1 μ F
REF
R T
C7
0.1 μ F
V ADJ1
GND
V ADJ2
R1
24.3k
LED 1
3A LED
CURRENT
D1, D2: B240A
D3, D4: MBR0540
f SW = 600kHz
3475 TA04
C1 TO C5: X5R OR X7R
Dual Step-Down LED Driver with Series Connected LEDs
V IN
10V TO 36V
C1
4.7 μ F
D3
50V
V IN
SHDN
D4
C2
BOOST1
BOOST2
C3
L2
15 μ H
0.22 μ F
10V
LT3475
0.22 μ F
10V
L1
15 μ H
C4
D1
SW1
OUT1
SW2
OUT2
D2
C5
2.2 μ F
10V
LED 1
LED1
V C1
LED2
V C2
LED 2
2.2 μ F
10V
1.5A LED
CURRENT
C6
0.1 μ F
REF
R T
C7
0.1 μ F
1.5A LED
CURRENT
LED 3
V ADJ1
GND
V ADJ2
R1
24.3k
LED 4
D1, D2: B240A
D3, D4: MMSD4148T1
f SW = 600kHz
3475 TA05
C1 TO C5: X5R OR X7R
3475fb
17
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