LT3518EUF View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT3518EUF' PDF : 20 Pages View PDF
LT3518
TYPICAL APPLICATIONS
Buck-Boost Mode LED Driver
VIN
8V TO 16V
PWM
C1
2.2μF
L1
4.3μH
D1
SHDN VIN
SW
FB
PWM
ISP
TGEN LT3518
VREF
ISN
CTRL
TG
SYNC
VC RT SS GND
C4
0.1μF
RT
6.04k
2MHz
C3
0.1μF
R1
3.92M
R2
124k 300mA
RSENSE
330mΩ
M1
C5
0.22μF
C2
4.7μF
3518 TA04a
C1: KEMET C0806C225K4RAC
C2: KEMET C1206C475K3RAC
C3, C4: MURATA GRM21BR71H104KA01B
C5: MURATA GRM21BR71H224KA01B
D1: ZETEX ZLLS2000TA
L1: TOKO B992AS-4R3N
LEDS: LUXEON I (WHITE)
M1: ZETEX ZXMP6A13GTA
PWM
5V/DIV
ILED
200mA/DIV
3000:1 PWM Dimming at 120Hz
IL1
1A/DIV
VIN = 10V
fOSC = 2MHz
ILED = 300mA
500ns/DIV
3518 TA04b
Efficiency
90
VIN = 10V
80 CTRL = VREF
70
60
50
40
30
20
0
20
40
60
80 100
PWM DUTY CYCLE (%)
3518 TA04c
3518fe
14
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