LT3591
TYPICAL APPLICATIONS
Li-Ion Driver for Ten White LEDs
Efficiency
D1
L1
85
80
75
70
65
60
55
22µH
*OPTIONAL
V
= 3.6V
IN
10 LEDs
SW
LT3591
GND
NO SCHOTTKY
V
IN
V
CAP
IN
3V TO 5V
R
SENSE
10Ω
SHUTDOWN
AND DIMMING
CONTROL
CTRL
LED
EXTERNAL SCHOTTKY
C2
2.2µF
C1
1µF
0
5
10
15
20
LED CURRENT (mA)
3491 TA02b
C1:TAIYO YUDEN EMK107BJ105MA
L1: TAIYO YUDEN NR4018T220M
C2: MURATA GRM31CR71H225KA88 D1: PHILLIPS PMEG4005AEA
Li-Ion Driver for Four White LEDs at 50mA
Efficiency
SHUTDOWN AND
80
75
70
65
60
DIMMING CONTROL
V
= 3.6V
IN
4 LEDs
CTRL
V
IN
V
CAP
LED
IN
3V TO 5V
R
L1
10µH
SENSE
LT3591
GND
3.92Ω
SW
C2
4.7µF
C1
1µF
20
LED CURRENT (mA)
0
10
30
40
50
C1:TAIYO YUDEN EMK107BJ105MA
C2: MURATA GRM31CR71H475KA12L
L1: MURATA LQH32CN100K53
3591 TA03b
3591f
12
Linear Systems [ Linear Systems ]
