lt3517 Linear Technology Corporation, lt3517 Datasheet - Page 14

• Manufacturer Part Number: lt3517
• Description: Full-featured Led Driver With 1.5a Switch Current
• Manufacturer: Linear Technology Corporation

LT3517
TYPICAL APPLICATIONS
14
200mA/DIV
5V/DIV
1A/DIV
PWM
I
LED
I
L
V
f
I
OSC
LED
IN
= 12V
= 300mA
= 2MHz
5000:1 PWM Dimming at 100Hz
8V TO 16V
500ns/DIV
V
IN
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
C1
2.2μF
PWM
3517 TA04b
0.1μF
C4
Buck-Boost Mode LED Driver
PWM
TGEN
V
CTRL
SYNC
V
SHDN
REF
C
2MHz
6.04k
R
T
R
V
LT3517
IN
T
SS
6.8μH
L1
C3
0.1μF
SW
GND
ISN
ISP
TG
FB
D1
R1
3.92M
R2
124k
90
80
70
60
50
40
30
20
0
M1
R
330mΩ
V
CTRL = V
300mA
SENSE
IN
= 12V
20
REF
PWM DUTY CYCLE (%)
C2
4.7μF
Effi ciency
40
C5
0.22μF
3517 TA04a
60
80
3517 TA04c
100
3517f