LT3517HFE-PBF Ver la hoja de datos (PDF) - Linear Technology
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LT3517HFE-PBF Datasheet PDF : 20 Pages
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LT3517
TYPICAL APPLICATIONS
Buck Mode 1A LED Driver
PVIN
24V
VIN
3.3V C1
2.2µF
VREF
PWM
C2
2.2µF
RSENSE
100mΩ M1
ISP
VIN
SHDN
ISN TG
SW
LT3517
CTRL
FB
PWM
SS
SYNC
RT
TGEN VREF VC GND
C4
0.1µF
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
1A
RT
16.9k
1MHz
C3
10µF
L1
15µH
D1
C5
0.1µF
3517 TA02a
2000:1 PWM Dimming at 120Hz
PWM
5V/DIV
ILED
1A/DIV
IL
1A/DIV
PVIN = 24V
fOSC = 1MHz
ILED = 1A
1µs/DIV
3517 TA02b
350mA, 5V to 12V Boost Converter with Accurate Input Current Limit
RSENSE L1
100mΩ 6.8µH
D1
VIN
5V
C1
2.2µF
SHDN
ISP TG ISN
VIN
CTRL
PWM
SHDN LT3517
TGEN
VREF
VC GND
SW
FB
SYNC
RT
SS
R3
10k
C4
10nF
C3
0.1µF
RT
6.04k
2MHz
C1: KEMET C0805C225K4RAC
C2: KEMET C1206C106K4RAC
C3: MURATA GRM21BR71H104KA01B
C4: MURATA GCM033R71A103KA03
D1: ZETEX ZLLS1000TA
L1: TOKO B992AS-6R8N
R1
549k
VOUT
12V
350mA
C2
10µF
R2
49.9k
3517 TA03a
Efficiency
90
80
70
60
50
50
100 150 200 250 300 350
ILOAD(mA)
3517 TA03b
12
For more information www.linear.com/LT3517
3517fg
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