Datasheet

LT3497
18
3497f
TYPICAL APPLICATIONS
Li-Ion to 6/6 White LEDs
Conversion Effi ciency
2-Cell Li-Ion Movie and Flash Mode/6 White LEDs Control
Conversion Effi ciency
SW1 V
IN
LT3497
GND
SW2
L2
15µH
R
SENSE2
10Ω
R
SENSE1
10Ω
C3
1µF
C2
1µF
3497 TA07a
C1
1µF
V
IN
3V TO 5V
L1
15µH
CAP1 CAP2
LED1 LED2
CTRL1
SHUTDOWN
AND DIMMING
CONTROL 1
SHUTDOWN
AND DIMMING
CONTROL 2
CTRL2
OFF ON
OFF ON
C1, C2: TAIYO YUDEN GMK212BJ105KG
C3: TAIYO YUDEN LMK212BJ105MG
L1, L2: MURATA LQH32CN150K53
LED CURRENT (mA)
0
50
EFFICIENCY (%)
55
60
65
70
75
80
V
IN
= 3.6V
6/6LEDs
5101520
3497 TA07b
CAP1 V
IN
LT3497
GND
SW2
L2
15µH
L1
15µH
FLASH
MOVIE
R
SENSE2
10Ω
R
SENSE1
1Ω
C3
1µF
C2
1µF
3497 TA08a
C1
4.7µF
V
IN
6V TO 9V
LED1
D1
CAP2
SW1 LED2
1.5V
680mV
V
CTRL1
CTRL1
SHUTDOWN
AND DIMMING
CONTROL 2
CTRL2
OFF ON
MODE
MOVIE
FLASH
I
LED
100mA
200mA
C1: TAIYO YUDEN LMK212BJ475KD
C2: TAIYO YUDEN GMK212BJ105KG
C3: TAIYO YUDEN LMK212BJ105MG
D1: AOT-2015 HPW1751B
L1, L2: MURATA LQH32CN150K53
V
IN
(V)
6
65
EFFICIENCY (%)
70
75
80
85
6.5 7 7.5 8
3497 TA08b
8.5 9
1-100mA LED/6 LEDs