LT3517I View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT3517I' PDF : 20 Pages View PDF
TYPICAL APPLICATIONS
Boost 100mA LED Driver with LED Open Protection
VIN
8V TO 16V
L1
22µH
SHDN VIN
SW
FB
PWM
C1
2.2µF
PWM
ISP
TGEN
VREF LT3517
ISN
CTRL
TG
SYNC
VC RT SS GND
C4
0.1µF
RT
16.9k
1MHz
C3
0.1µF
C1, C2: KEMET C1206C225K2RAC
C3, C4: MURATA GRM21BR71H104KA01B
D1: DIODES DFLS160
L1: COILCRAFT DS3316P-223
LEDS: CREE XLAMP 7090
M1: ZETEX ZXMP6A13FTA
D1
R1
1M
R2
30.1k
RSENSE
1Ω
M1
100mA
LED1
LED2
C2
2.2µF
LED10
3517 TA06a
LT3517
3000:1 PWM Dimming at 100Hz
PWM
5V/DIV
ILED
100mA/DIV
IL
500mA/DIV
VIN = 12V
fOSC = 1MHz
ILED = 100mA
1µs/DIV
3517 TA06b
Efficiency
90
80
70
VIN = 12V
60 CTRL = VREF
50
40
30
20
0
20
40
60
80
100
PWM DUTY CYCLE (%)
3517 TA06c
For more information www.linear.com/LT3517
3517fg
15
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