LT3492 LINER [Linear Technology], LT3492 Datasheet - Page 7

• Manufacturer Part Number: LT3492
• Description: Triple Output LED Driver with 3000:1 PWM Dimming
• Manufacturer: LINER [Linear Technology]

BLOCK DIAGRAM
V
IN
C
C
R3
R4
C3
V
IN
R
R5
C
C4
OVP1
V
CTRL1
V
SHDN
V REF
C1
IN
R6
REFERENCE
1V
2V
REGULATOR
PWM1
AND UVLO
INTERNAL
+
+
–
A8
Figure 1. LT3492 Block Diagram Working in Boost Confi guration
ISP1
BUFFER
–
+
+
+
CTRL
V
R
R1 2k
SENSE
SENSE
V1
A9
–
–
Q3
ISN1
R2
20k
I
LED
+
–
V
IN
Q2
A1
200μA
EAMP
M1
TG1
SLOPE
LED ARRAY
OSCILLATOR
GENERATOR
RAMP
FADJ
V
C
1V
–
+
A2
C2
–
+
COMPARATOR
SHARED COMPONENTS
MOSFET
DRIVER
A6
PWM
A7
SR LATCH
R
A3
S
Q
V
IN
PWM1
REPLICATED FOR EACH CHANNEL
ISENSE
A4
A10
C1
D1
L1
DRIVER
+
–
NPN
A5
LT3492
Q1
SW1
GND
3492 BD
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