Datasheet

LT3477
17
3477fc
TYPICAL APPLICATIONS
I
SN1
I
SP1
V
IN
I
ADJ1
I
ADJ2
FBN
I
SP2
R3
200k
R1
0.1Ω
R4
10k
C1
3.3μF
LED BRIGHTNESS
CONTROL
0mV TO 650mV
V
IN
2.7V TO 10V
C3
33nF
C2
4.7μF
C
C
10nF
C1: TAIYO YUDEN LMK316BJ335ML
C2: MURATA GRM31CR71E475KA88L
D1: DIODES, INC. B320A
L1: TOKO FDV0630-4R7M
3477 TA06a
R2
18k
SW1
L1
4.7μH
D1
LED1
FBP SSGND
LT3477
I
SN2
R
T
SHDN
V
C
V
REF
SHDN
LED2
Buck-Boost Mode LED Driver
Effi ciency
I
OUT
(A)
0
EFFICIENCY (%)
65
70
75
0.6
1.0
3477 TA06b
60
55
50
0.2 0.4 0.8
80
85
90
V
IN
= 8V
V
IN
= 4.2V
V
IN
(V) I
OUT
(A)
2.7 0.57
3.6 0.74
4.2 0.83
5 0.93
8 1.0