lt3590 Linear Technology Corporation, lt3590 Datasheet - Page 13

• Manufacturer Part Number: lt3590
• Description: 48v Buck Mode Led Driver In Sc70 And 2mm X 2mm Dfn
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIONS
CONTROL
12V OR 24V
CONTROL
>1.5V
CONTROL
L1: MURATA LQH32CN-221
48V
V
0.1μF
>1.5V
IN
12V or 24V Supply for a Single LED, 50mA Current
C1
1μF
>1.5V
C3
V
12V
48V Supply for Two Strings of 10 LEDs, 25mA Current
IN
V
12V Supply for a 3 LED String, 50mA Current
IN
V
CTRL
VREG
C1
1μF
C3
0.1μF
IN
C1
1μF
C3
0.1μF
LT3590
GND
4Ω
R1
V
CTRL
VREG
IN
V
CTRL
VREG
IN
LED
SW
LT3590
1μF
C2
GND
LT3590
4Ω
R1
GND
R1
4Ω
LED
SW
2.2μF
LED
SW
C2
1μF
C2
25mA
25mA
50mA
50mA
220μH
3590 TA07a
220μH
L1
3590 TA05a
L1
470μH
3590 TA06a
L1
100
100
80
60
90
80
70
60
50
40
90
70
60
50
40
80
75
70
65
55
50
45
40
0
0
0
5
10
10
Conversion Effi ciency
Conversion Effi ciency
Conversion Effi ciency
LED CURRENT (mA)
LED CURRENT (mA)
LED CURRENT (mA)
10
20
20
15
30
30
12V
24V
20
40
40
3590 TA07b
3590 TA05b
3590 TA06b
LT3590
25
50
50
13
3590f