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ADD5207 데이터 시트보기 (PDF) - Analog Devices
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ADD5207
Four-String, White LED Driver for LCD Backlight Applications
Analog Devices
ADD5207 Datasheet PDF : 16 Pages
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Data Sheet
ADD5207
FUNCTIONAL BLOCK DIAGRAM
VIN
VDD
1
8
SHDN
10
UVP
REF
VOUT_FB
LINEAR
REGULATOR
VOLTAGE
REFERENCE
UVP
COMP
SHUTDOWN
500kΩ
THERMAL
SHUTDOWN
GND
ADD5207
ERROR
AMP
g
m
LL
REF
LL COMP
PWM
COMP
COMP
11
DCOMP
DREF
OSC
+
+
HEADROOM CONTROL
OVP
SW
13
14
VOUT_FB
GND
OVP
REF
R
Q
S
2
FSLCT
CURRENT SENSE
SOFT START
VDD
ISET
3
REF
PWM
9
PWM
DUTY
EXTRACTOR
500kΩ
GND
CURRENT SOURCE DRIVER
FPWM OSCILLATOR
LED OPEN/SHORT
FAULT DETECTOR
CURRENT SOURCE 1
CURRENT SOURCE 2
CURRENT SOURCE 3
CURRENT SOURCE 4
Figure 2. Functional Block Diagram
12
GND
4
FB1
5
FB2
6
FB3
7
FB4
Rev. A | Page 3 of 16
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