LT3519 LINER [Linear Technology], LT3519 Datasheet - Page 14

• Manufacturer Part Number: LT3519
• Description: LED Driver with Integrated Schottky Diode
• Manufacturer: LINER [Linear Technology]

LT3519
TYPICAL APPLICATIONS
14
OPENLED
V
0.5A/DIV
10V/DIV
10V/DIV
IN
-V
I
OUT
LED
(UP TO 40V TRANSIENT)
V
IN
= 15V
Waveforms for Open LED
12V TO 30V
V
IN
25μs/DIV
C1
4.7μF
C1: MURATA GRM32ER71H475KA88
C2: TDK C3216X7R1C106M
Q1: DIODES FMMT 555 PNP
Q2: DIODES FMMT 494 NPN
L1: COILTRONICS DR73-470-R
M1: VISHAY SILICONIX Si2337DS
100k
3519 TA04b
1M
191k
SHDN
Buck Mode 500mA LED Driver
1M
SHDN/UVLO
CTRL
V
OPENLED
GND
REF
V
IN
LT3519
PWM
PWM
CATHODE
ANODE
ISN
SW
ISP
FB
92
90
88
86
84
82
80
5V
10
9V LED
500mA
V
OUT
M1
14
L1
47μH
Effi ciency vs V
R
0.5Ω
SENSE
18
V
IN
(V)
Q2
22
1.5k
1k
IN
26
10k
C2
10μF
3519 TA04C
Q1
30
130k
14.7k
3519 TA04a
3519f