Datasheet

LT3486
15
3486fe
TYPICAL APPLICATIONS
Efficiency vs V
IN
Li-Ion Cell Powered Driver for Camera Flash and LCD Backlighting
3486 TA02a
V
IN
3V TO 5V
D1
L1
10µH
L2
10µH
D2
C
IN
10µF
C
REF
0.1µF
C
OUT2
2.2µF
C
OUT1
2.2µF
4.7nF
0.1µF
25mA
DIMMING 2DIMMING 1
320mA
OFF ON
OFF ON
R
FB2
8.06Ω
R
FB1
0.62Ω
63.4k
100k
2.8k
Q1
LED1
AOT3218
5V
0V
C
IN
: 6.3V, X5R OR X7R DIELECTRIC
C
OUT1
, C
OUT2
: 35V, X5R OR X7R
D1: ZETEX ZHCS1000
D2: ZETEX ZHCS400
L1, L2: TOKO D53LC (TYPE A)
Q1: FAIRCHILD FDN5630
V
C1
V
C2
R
T
SW1 SW2
V
IN
LT3486
OVP2
CTRL2
REF
PWM2
FB2
OVP1
CTRL1
SHDN
PWM1
FB1
V
IN
(V)
3
65
EFFICIENCY (%)
70
75
80
85
90
3.2
3.4 3.6 3.8
3486 TA01b
4 4.2
MOVIE MODE
I
LED1
= 175mA
FLASH MODE
I
LED1
= 320mA
8 LEDS/25mA