LTC3783 LINER [Linear Technology], LTC3783 Datasheet - Page 7
LTC3783
Manufacturer Part Number
LTC3783
Description
Full-Featured LED Driver with 1.5A Switch Current
Manufacturer
LINER [Linear Technology]
Datasheet
1.LTC3783.pdf
(20 pages)
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BLOCK DIAGRAM
PV
IN
SHDN
CTRL
FB
VC
SYNC
SS
RT
1.01V
+
ISP
R
1V
X10
SENSE
1V
V
–
IN
ISN
–
+
+
+
–
9μA
CURRENT
SENSE
AMPLIFIER
A1
A2
+
–
1V
A5
–
+
+
A6
+
+
ADJUST
FREQ
SS
C
A3
IN
Figure 1. Buck Mode LED Driver
AMPLIFIER
Q2
ERROR
MOSFET DRIVER
2.5MHz TO 250kHz
V
TG
ISP
OSCILLATOR
GENERATOR
V
ISP
– 7V
RAMP
LED ARRAY
–
+
V
COMPARATOR
IN
A4
PWM
TGEN
R
S
Q
C
FILT
PWM
2V
+
–
MAIN SWITCH
DRIVER
A7
A8
100μA
+
–
V
IN
Q1
POWER
SWITCH
LT3517
SW
V
GND
REF
3517 F01
3517ff
7
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