lt3517 Linear Technology Corporation, lt3517 Datasheet - Page 13

• Manufacturer Part Number: lt3517
• Description: Full-featured Led Driver With 1.5a Switch Current
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIONS
V
5V
350mA, 5V to 12V Boost Converter with Accurate Input Current Limit
IN
PV
3.3V
24V
V
C1: KEMET C0805C225K4RAC
C2: MURATA GRM31MR71E225KA93
C3: MURATA GRM32DR71E106KA12B
C4, C5: MURATA GRM21BR71H104KA01B
D1: DIODES DFLS160
L1: TOKO B992AS-150M
LEDS: LUXEON K2 (WHITE)
M1: ZETEX ZXMP6A13FTA
IN
IN
2.2μF
C1: KEMET C0805C225K4RAC
C2: KEMET C1206C106K4RAC
C3: MURATA GRM21BR71H104KA01B
C4: MURATA GCM033R71A103KA03
D1: ZETEX ZLLS1000TA
L1: TOKO B992AS-6R8N
PWM
V
REF
C1
SHDN
C1
2.2μF
C2
2.2μF
10nF
Buck Mode 1A LED Driver
C4
V
CTRL
PWM
SHDN
TGEN
V
10k
V
SHDN
CTRL
PWM
SYNC
R3
ISP
TGEN
IN
REF
IN
ISP
V
R
100mΩ
C
100mΩ
SENSE
R
TG
0.1μF
SENSE
V
LT3517
LT3517
REF
C4
GND
ISN
ISN
6.8μH
V
C
L1
M1
TG
GND
SS
SYNC
SW
SW
SS
FB
R
FB
R
C3
0.1μF
T
T
1A
D1
R
16.9k
1MHz
T
R
6.04k
2MHz
T
C5
0.1μF
R1
549k
R2
49.9k
L1
15μH
3517 TA03a
C3
10μF
3517 TA02a
D1
C2
10μF
V
12V
350mA
OUT
5V/DIV
1A/DIV
1A/DIV
PWM
I
LED
I
L
PV
f
I
OSC
LED
IN
90
80
70
60
50
= 1A
= 1MHz
= 24V
2000:1 PWM Dimming at 120Hz
50
100
Effi ciency
150
1μs/DIV
I
LOAD
200
(mA)
250
300
3517 TA03b
3517 TA02b
LT3517
350
13
3517f