LT3518EUF View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT3518EUF' PDF : 20 Pages View PDF
TYPICAL APPLICATIONS
Buck Mode 1A LED Driver with Open LED Protection and Sync Input
RSENSE
PVIN
100mΩ M1
32V
C2
LED1
2.2μF
1A
R1
49.9k
C3
Q1
10μF
LED6
R3
5.62k
FB
R2
2.00k
VIN
3.3V C1
2.2μF
VREF
PWM
SYNC
3.3V, 1.2MHz
ISP
VIN
SHDN
ISN TG
SW
LT3518
CTRL
FB
PWM
SS
SYNC
RT
TGEN VREF VC GND
C4
0.1μF
L1
10μH
D1
FB
RT
16.9k
1MHz
C5
0.1μF
3518 TA05a
C1: KEMET C0806C225K4RAC
C2: MURATA GRM31MR71E225KA93
C3: MURATA GRM32DR71E106KA12B
C4, C5: MURATA GRM21BR71H104KA01B
D1: ZETEX ZLLS2000TA
L1: TOKO B992AS-100M
LEDS: LUXEON III (WHITE)
M1: ZETEX ZXMP6A13GTA
Q1: PHILIPS PMBT3906
LT3518
1000:1 PWM Dimming at 120Hz
PWM
5V/DIV
ILED
1A/DIV
IL1
1A/DIV
PVIN = 32V
fOSC = 1.2MHz
ILED = 1A
2μs/DIV
3518 TA05b
Efficiency
100
CTRL = VREF
90
80
70
60
50
40
0
20
40
60
80 100
PWM DUTY CYCLE (%)
3518 TA05c
3518fe
15
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