Datasheet

LT3517
15
3517fg
For more information www.linear.com/LT3517
TYPICAL APPLICATIONS
Boost 100mA LED Driver with LED Open Protection
LED1
M1
LED2
LED10
D1
L1
22µH
R
SENSE
1Ω
R1
1M
R2
30.1k
SHDN
VC GNDRT SS
R
T
16.9k
1MHz
3517 TA06a
C3
0.1µF
C2
2.2µF
C1
2.2µF
C4
0.1µF
PWM
ISP
ISN
TG
FB
TGEN
V
REF
CTRL
SYNC
100mA
V
IN
8V TO 16V
V
IN
LT3517
SW
PWM
C1, C2: KEMET C1206C225K2RAC
C3, C4: MURATA GRM21BR71H104KA01B
D1: DIODES DFLS160
L1: COILCRAFT DS3316P-223
LEDS: CREE XLAMP 7090
M1: ZETEX ZXMP6A13FTA
3000:1 PWM Dimming at 100Hz
Efficiency
PWM DUTY CYCLE (%)
0
20
EFFICIENCY (%)
30
40
50
60
70
80
90
20 40 60 80
3517 TA06c
100
V
IN
= 12V
CTRL = V
REF
PWM
5V/DIV
I
L
500mA/DIV
I
LED
100mA/DIV
1µs/DIV
V
IN
= 12V
f
OSC
= 1MHz
I
LED
= 100mA
3517 TA06b