lt3591 Linear Technology Corporation, lt3591 Datasheet - Page 12

• Manufacturer Part Number: lt3591
• Description: White Led Driver With Integrated Schottky In 3mm X 2mm Dfn
• Manufacturer: Linear Technology Corporation

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