LT3477 LINER [Linear Technology], LT3477 Datasheet - Page 16

• Manufacturer Part Number: LT3477
• Description: 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
• Manufacturer: LINER [Linear Technology]

LT3477
V
3.3V
TYPICAL APPLICATIO S
16
5V
IN
V
IN
R
1k
C
C3
3.3µF
R
1k
C1
3.3µF
SHDN
C
SHDN
1A Buck Mode High Current LED Driver
C
4.7nF
C1: NIPPON UNITED CHEMICON NTS40X5R1H225M
C2: TAIYO YUDEN GMK316BJ105ML
C3: TAIYO YUDEN LMK316BJ475
L1: TOKO A814AY-330M
D1: DIODES INC DFLS140
C1: TAIYO YUDEN LMK316BJ335ML
C2: TAIYO YUDEN TMK325BJ335MN
D1: DIODES INC. DFLS120L
L1: TOKO A915AY-100M
C
C
4.7nF
C
87% Efficient, 4W LED Driver
I
V
I
I
SHDN
V
V
SP1
ADJ1
ADJ2
IN
V
I
I
C
REF
SHDN
V
V
ADJ1
ADJ2
IN
C
REF
0.05Ω
I
SP1
FBP
R4
FBP
I
SN1
PV
LT3477
32V
GND
I
LT3477
10µH
SN1
IN
GND
L2
1A
LED1
LED4
SW
SS
SS
•
•
•
SW
U
I
FBN
I
SN2
SP2
C3
33nF
I
I
R
FBN
L1
33µH
R1
0.1Ω
LED
STRING C2
SP2
SN2
C4
33nF
R
T
D1
T
D1
R3
22k
1µF
R2
22k
R1
10k
R2
200k
3477 TA05a
R3
280k
R4
10k
R6
0.3Ω
3477 TA03a
330mA
LED1
LED2
LED3
LED4
C2
3.3µF
C1
2.2µF
100
90
80
60
50
40
20
90
85
80
75
70
65
60
55
50
70
30
0
0
0.2
0.1
LED CURRENT (A)
Efficiency
Efficiency
0.4
I
OUT
0.2
(A)
0.6
0.3
0.8
3477 TA01b
3477 TA05b
0.4
1
3477fb