LT1184CS Linear Technology, LT1184CS Datasheet - Page 20

• Manufacturer Part Number: LT1184CS
• Description: IC SW REG CCFL CONTRAST 16-SOIC
• Manufacturer: Linear Technology

Specifications of LT1184CS

• Applications: Converter, CCFL
• Voltage - Input: 3 ~ 30 V
• Number Of Outputs: 1
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -

LT1182/LT1183/LT1184/LT1184F
TYPICAL APPLICATIONS
20
SHUTDOWN
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 [phone]
THE I
RMS BULB CURRENT IS:
I
0% TO 90% DUTY CYCLE FOR THE PWM
SIGNAL CORRESPONDS TO 0 TO 6mA.
CCFL
1kHz PWM
0V TO 5V
V (PWM)
CCFL
(9 10
CURRENT REQUIRED FOR AN
–3
2.2 F
) (I
38.3k
1%
R4
C6
BULB
+
).
C8,0.68 F
R5,38.3k, 1%
BAT85
C7, 1 F
D5
90% Efficient Grounded CCFL Configuration with Negative Polarity LCD Contrast
R7, 10k
1
2
3
4
5
6
7
8
I
DIO
CCFL V
AGND
SHDN
LCD V
CCFL
PGND
LCD
PGND
CCFL
U
C5
1000pF
C
C
LT1183
100k
R3
N
CCFL V
LCD V
ROYER
BULB
R2
220k
BAT
REF
V
SW
SW
FB
IN
16
15
14
13
12
11
10
9
Q2*
3
V (CONTRAST)
UP TO 6mA
10
0.068 F
LAMP
+
C1*
0V TO 5V
2
L2
100 H
C3B
2.2 F
35V
6
Q1*
1
R10, 10k, 1%
C2
27pF
3kV
4
1N5818
D1
5
L1
C9
0.01 F
R9, 4.99k, 1%
R1
750
+
C4
2.2 F
+
+
D3
1N5934A
24V
D2
1N914
D5
1N4148
V
C12
2.2 F
35V
C3A
2.2 F
35V
IN
3V
4
2
N = 1:2
L3
VARYING THE V(CONTRAST)
VOLTAGE FROM 0V TO 5V GIVES
VARIABLE NEGATIVE CONTRAST
FROM –10V TO –30V
6
9
C10
0.1 F
1N914
D4
40.2k
R11
1%
+
BAT
8V TO 28V
NEGCON
C11
22 F
35V
1182 TA02