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LT1183CS Datasheet(PDF) 20 Page - Linear Technology

Part # LT1183CS
Description  CCFL/LCD Contrast Switching Regulators
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1183CS Datasheet(HTML) 20 Page - Linear Technology

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LT1182/LT1183/LT1184/LT1184F
TYPICAL APPLICATIONS N
90% Efficient Grounded CCFL Configuration with Negative Polarity LCD Contrast
BAT
8V TO 28V
NEGCON
1182 TA02
VARYING THE V(CONTRAST)
VOLTAGE FROM 0V TO 5V GIVES
VARIABLE NEGATIVE CONTRAST
FROM –10V TO –30V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ICCFL
DIO
CCFL VC
AGND
SHDN
LCD VC
CCFL VSW
BULB
BAT
ROYER
VIN
REF
FB
LCD VSW
CCFL
PGND
LCD
PGND
LT1183
LAMP
UP TO 6mA
10
6
L1
L3
R1
750
Ω
L2
100
µH
3
2
1
4
5
+
C12
2.2
µF
35V
+
+
C7, 1
µF
C1*
0.068
µF
D1
1N5818
D5
BAT85
D2
1N914
D4
1N914
V (PWM)
0V TO 5V
1kHz PWM
SHUTDOWN
C8,0.68
µF
R7, 10k
R4
38.3k
1%
C5
1000pF
R2
220k
R3
100k
C3A
2.2
µF
35V
C11
22
µF
35V
V (CONTRAST)
0V TO 5V
R11
40.2k
1%
R10, 10k, 1%
C4
2.2
µF
VIN
≥ 3V
D3
1N5934A
24V
C3B
2.2
µF
35V
C2
27pF
3kV
+
C1 MUST BE A LOW LOSS CAPACITOR,
C1 = WIMA MKP-20
Q1, Q2 = ZETEX ZTX849 OR ROHM 2SC5001
L1 = COILTRONICS CTX210605
L2 = COILTRONICS CTX100-4
L3 = COILTRONICS CTX02-12403
*DO NOT SUBSTITUTE COMPONENTS
COILTRONICS (407) 241-7876
THE ICCFL CURRENT REQUIRED FOR AN
RMS BULB CURRENT IS:
ICCFL (9 × 10
–3) (I
BULB).
0% TO 90% DUTY CYCLE FOR THE PWM
SIGNAL CORRESPONDS TO 0 TO 6mA.
Q2*
Q1*
N = 1:2
C6
2.2
µF
R5,38.3k, 1%
R9, 4.99k, 1%
D5
1N4148
C10
0.1
µF
6
4
29
C9
0.01
µF
+
+



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