
LT3496
BLOCK DIAGRAM
D1
+
–
V SENSE
R SENSE 0.2
I LED
M1
LED1
C2
V IN
C1
L1
R3
R4
OVP1
VC1
CAP1
LED1
TG1
A7
MOSFET
DRIVER
PWM1
SW1
C C
R C
PWM1
+
V1
R1 2k
–
+
–
A1
EAMP
1V
A6
A4
NPN
DRIVER
A5
Q1
1V
CTRL1
+
+
A8
Q3
VC
A2
SR LATCH
A3
R Q
–
CTRL
BUFFER
SLOPE
PWM
COMPARATOR
S
ISENS2
+
R2
20k
A10
–
GND
REPLICATED FOR EACH CHANNEL
V IN
C3
V IN
SHDN
VREF
INTERNAL
REGULATOR
AND UVLO
V IN
ISRC
200μA
RAMP
GENERATOR
A9
Q2
OSCILLATOR
2V
REFERENCE
f ADJ
R5
C4
R6
SHARED COMPONENTS
3496 BD
Figure 1. LT3496 Block Diagram Working in Boost Configuration
3496ff