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LT3519 Datasheet(PDF) 13 Page - Linear Technology

Part # LT3519
Description  LED Driver with Integrated Schottky Diode
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3519 Datasheet(HTML) 13 Page - Linear Technology

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LT3519
13
3519f
TYPICAL APPLICATIONS
Buck-Boost Mode 150mA LED Driver
Waveform for Open LED
Efficiency vs VIN
VIN
SW
L1
47μH
RSENSE
1.67Ω
VOUT
16V LED 150mA
VREF
PWM
CTRL
357k
24.3k
3519 TA03a
10k
CATHODE
SHDN/UVLO
ISN
ISP
FB
OPENLED
LT3519
GND
1M
1M
210k
100k
243k
VIN
6V TO 24V
C1
1μF
ANODE
C2
1μF
C3
4.7μF
Q1
C1: TDK C3216X7R1H105K
C2: TDK C3216X7R1H105K
C3: TDK C3216X7R1E475K
L1: COILTRONICS DR73-470-R
Q1: DIODES FMMT 555 PNP
NOTE:
VIN = 8.2V RISING TURN ON
VIN = 6.2V FALLING UVLO
VIN > 7V FULL LED CURRENT AND FOLDBACK BELOW
VOUT – VIN 18.5V OVERVOLTAGE PROTECTION
VOUT
10V/DIV
ILED
0.1A/DIV
OPENLED
10V/DIV
50μs/DIV
3519 TA03b
VIN = 12V
VIN (V)
6
72
74
76
15
21
3519 TA03c
70
68
66
912
18
78
80
82
24



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