lt3519emstrpbf Linear Technology Corporation, lt3519emstrpbf Datasheet - Page 13

• Manufacturer Part Number: lt3519emstrpbf
• Description: Led Driver With Integrated Schottky Diode
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIONS
OPENLED
0.1A/DIV
10V/DIV
10V/DIV
V
I
OUT
LED
V
IN
= 12V
Waveform for Open LED
6V TO 24V
50μs/DIV
V
IN
C1
1μF
C1: TDK C3216X7R1H105K
C2: TDK C3216X7R1H105K
C3: TDK C3216X7R1E475K
L1: COILTRONICS DR73-470-R
Q1: DIODES FMMT 555 PNP
NOTE:
V
V
V
V
IN
IN
IN
OUT
= 8.2V RISING TURN ON
= 6.2V FALLING UVLO
> 7V FULL LED CURRENT AND FOLDBACK BELOW
– V
100k
IN
3519 TA03b
Buck-Boost Mode 150mA LED Driver
18.5V OVERVOLTAGE PROTECTION
1M
210k
1M
243k
SHDN/UVLO
V
PWM
CTRL
V
OPENLED
REF
IN
16V LED 150mA
47μH
L1
LT3519
GND
SW
CATHODE
ANODE
ISN
ISP
FB
82
80
78
76
74
72
70
66
68
6
Q1
R
1.67Ω
SENSE
357k
24.3k
3519 TA03a
9
10k
Effi ciency vs V
12
V
C3
4.7μF
V
OUT
IN
15
(V)
C2
1μF
18
IN
21
3519 TA03c
24
LT3519
13
3519f