LT3519 LINER [Linear Technology], LT3519 Datasheet - Page 7

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

BLOCK DIAGRAM
R1
R2
14
13
15
4
CTRL
FB
SHDN/UVLO
V
REF
2μA
Q3
11
+
2V
ISP
R
SENSE
1.22V
1.22V
4
1.2V
100mV
–
+
–
12
–
+
ISN
A6
–
+
+
+
–
+
–
A1
A2
100μA
G4
LED ARRAY
V
IN
V
Q2
IN
+
+
BANDGAP
AMPLIFIER
ERROR
A3
BIAS
AND
3
PWM
R
OSCILLATOR
GENERATOR
C
C
PWM
C
RAMP
–
+
A4
COMPARATOR
C
OUT
PWM
10
CATHODE
R
G1
S
D1
Q
1.16V
FB
7
ANODE
G2
+
–
MAIN SWITCH
A5
DRIVER
G3
+
–
6
1, 8, 9, 16
OPENLED
Q4
SW
Q1
MAIN
SWITCH
R
S
LT3519
GND
V
L1
IN
2
5
3519 BD
7
3519f
C
V
IN
IN