LT3517(RevA) 查看數據表（PDF） - Linear Technology
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LT3517 Datasheet PDF : 20 Pages
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BLOCK DIAGRAM
CIN
RSENSE
PVIN
LED ARRAY
CFILT
LT3517
ISP
ISN
X10
CURRENT
SENSE
AMPLIFIER
SHDN
CTRL
1V
–
+
A1
+
1.01V
FB
VC
+
A2
–
TG
VISP
TGEN
VISP – 7V
MOSFET DRIVER
+
A3
+
ERROR
AMPLIFIER
+
A4
–
PWM
COMPARATOR
RSQ
SYNC
SS
RT
+
A5
1V
–
VIN
10μA 1V
SS
RAMP
GENERATOR
2.5MHz TO 250kHz
OSCILLATOR
+
+ A6
Q2
–
FREQ
ADJUST
VIN
Figure 1. Buck Mode LED Driver
PWM
2V
SW
MAIN SWITCH
DRIVER
Q1
POWER
SWITCH
A8
GND
VIN
100μA
VREF
+
A7
–
3517 F01
3517fa
7
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