LT3491
TYPICAL APPLICATIO S
12V to One White LED at 200mA
C2
4.7 μ F
80
Efficiency
PV IN
12V
C3
1 μ F
R SENSE
1 ?
CAP
LED
D1
75
70
65
V IN
3V
SHUTDOWN
AND
DIMMING
C1
1 μ F
V IN
CTRL
LT3491
SW
L1
15 μ H
60
55
CONTROL
GND
3491 TA02a
C1, C3: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN LMK316BJ475ML
50
0
20 40 60 80 100 120 140 160 180 200
LED CURRENT (mA)
3491 TA02b
D1: LUXEON EMITTER LXHL-BWO2
L1: MURATA LQH32CN150
12V to Two White LEDs at 200mA
C2
4.7 μ F
90
Efficiency
PV IN
12V
C3
1 μ F
R SENSE
1 ?
D1
85
80
V IN
3V
SHUTDOWN
AND
DIMMING
C1
1 μ F
CAP LED
V IN
LT3491
CTRL
SW
L1
15 μ H
75
70
65
CONTROL
GND
3491 TA03a
60
C1, C3: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN LMK316BJ475ML
D1: LUXEON EMITTER LXHL-BWO2
0
20 40 60 80 100 120 140 160 180 200
LED CURRENT (mA)
3491 TA03b
L1: MURATA LQH32CN150
3491fa
13
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