LT3517I View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT3517I' PDF : 20 Pages View PDF
TYPICAL APPLICATIONS
Buck-Boost Mode LED Driver
VIN
8V TO 16V
PWM
C1
2.2µF
L1
6.8µH
D1
SHDN VIN
SW
FB
PWM
TGEN LT3517
ISP
VREF
CTRL
ISN
TG
R1
3.92M
R2
124k
300mA
RSENSE
330mΩ
M1
SYNC
VC RT SS
GND
C4
0.1µF
RT
6.04k
2MHz
C3
0.1µF
C5
0.22µF
C2
4.7µF
3517 TA04a
C1: KEMET C0806C225K4RAC
C2: KEMET C1206C475K3RAC
C3, C4: MURATA GRM21BR71H104KA01B
C5: MURATA GRM21BR71H224KA01B
D1: DIODE DFLS160
L1: TOKO B992AS-6R8N
LEDS: LUXEON I (WHITE)
M1: ZETEX ZXMP6A13FTA
LT3517
5000:1 PWM Dimming at 100Hz
PWM
5V/DIV
ILED
200mA/DIV
IL
1A/DIV
VIN = 12V
fOSC = 2MHz
ILED = 300mA
500ns/DIV
3517 TA04b
Efficiency
90
VIN = 12V
80 CTRL = VREF
70
60
50
40
30
20
0
20
40
60
80
100
PWM DUTY CYCLE (%)
3517 TA04c
For more information www.linear.com/LT3517
3517fg
13
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