lt3518euf-trpbf Linear Technology Corporation, lt3518euf-trpbf Datasheet - Page 14

• Manufacturer Part Number: lt3518euf-trpbf
• Description: Full-featured Led Driver With 2.3a Switch Current
• Manufacturer: Linear Technology Corporation

LT3518
TYPICAL APPLICATIONS
14
V
5V
IN
500mA, 5V to 12V Boost Converter with Accurate Input Current Limit
PV
3.3V
24V
V
C1: KEMET C0805C225K4RAC
C2: MURATA GRM31MR71E225KA93
C3: MURATA GRM32DR71E106KA12B
C4, C5: MURATA GRM21BR71H104KA01B
D1: ZETEX ZLLS2000TA
L1: TOKO B992AS-150M
LEDS: LUXEON K2 (WHITE)
M1: ZETEX ZXMP6A13GTA
IN
IN
C1: KEMET C0805C225K4RAC
C2: KEMET C1206C106K4RAC
C3: MURATA GRM21BR71H104KA01B
C4: MURATA GCM033R71A103KA03
D1: ZETEX ZLLS2000TA
L1: TOKO B992AS-4R3N
2.2μF
PWM
V
REF
C1
SHDN
C2
2.2 F
C2
2.2μF
10nF
Buck Mode 1.5A LED Driver
C4
V
CTRL
PWM
SHDN
TGEN
V
10k
R3
V
SHDN
CTRL
PWM
SYNC
ISP
IN
REF
TGEN
IN
ISP
V
R
50m
C
SENSE
TG
R
68mΩ
0.1μF
SENSE
V
LT3518
LT3518
REF
C4
GND
ISN
ISN
4.3 H
V
L1
C
SS
M1
TG
GND
SYNC
SW
FB
R
SW
SS
C3
0.1 F
FB
R
T
T
D1
1.5A
R
16.9k
1MHz
R
6.04k
2MHz
T
T
C5
0.1μF
R1
549k
R2
49.9k
L1
15μH
3518 TA03a
C3
10μF
3518 TA02a
D1
C2
10 F
V
12V
500mA
OUT
1A/DIV
1A/DIV
5V/DIV
PWM
I
LED
I
L
PV
f
I
90
70
60
50
80
OSC
LED
IN
0
= 1.5A
= 1MHz
1000:1 PWM Dimming at 120Hz
= 24V
100
Effi ciency
200
I
LOAD
2μs/DIV
(mA)
300
400
3518 TA03b
3518 TA02b
500
3518fb