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LT1184CS Fiches technique(PDF) 13 Page - Linear Technology

No de pièce LT1184CS
Description  CCFL/LCD Contrast Switching Regulators
PDF  24 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
Logo LINER - Linear Technology

LT1184CS Fiches technique(HTML) 13 Page - Linear Technology

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13
LT1182/LT1183/LT1184/LT1184F
BLOCK DIAGRAM
LT1182/LT1183 CCFL/LCD Contrast Regulator Top Level Block Diagram
FBN
10
–
+
ILIM
AMP2
COMP2
COMP1
UNDER-
VOLTAGE
LOCKOUT
THERMAL
SHUTDOWN
2.4V
REGULATOR
SHUTDOWN
200kHz
OSC
DRIVE 2
SHUTDOWN
9
6
LCD
VSW
LCD
PGND
LCD
VC
FBP
ICCFL
AGND
DIO
BULB
CCFL
VC
CCFL
PGND
CCFL
VSW
ROYER
BAT
VIN
LOGIC 2
ANTI-
SAT2
LOGIC 1
DRIVE 1
LCD
GAIN = 4.4
GAIN = 4.4
Q3
2
×
Q5
1
×
Q4
5
×
Q8
1
×
Q10
2
×
R1
0.125
Ω
R4
0.1
Ω
LT1183: FBP AND FBN ARE TIED TOGETHER TO CREATE FB
AT PIN 10. THE REFERENCE IS BROUGHT OUT TO PIN 11.
R2
0.25
Ω
Q6
2
×
R3
1k
D2
6V
D1
Q11
Q1
Q2
13
14
12
Q7
9
×
Q9
3
×
8
7
11
25
3
15
4
16
1
V2
1.24V
V1
0.45V
–
+
CCFL
0
µA TO
100
µA
–12mV
–
+
gm
––
++
–
+
ILIM
AMP1
ANTI-
SAT1
1182 BD01
+
–



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