LT1182 LINER [Linear Technology], LT1182 Datasheet - Page 21

• Manufacturer Part Number: LT1182
• Description: CCFL/LCD Contrast Switching Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
ALUMINUM ELECTROLYTIC IS RECOMMENDED FOR C3B WITH AN
ESR 0.5 TO PREVENT DAMAGE TO THE LT1184F HIGH-SIDE
SENSE RESISTOR DUE TO SURGE CURRENTS AT TURN-ON.
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
*DO NOT SUBSTITUTE COMPONENTS
COILTRONICS [phone]
0 A TO 45 A I
0mA TO 6mA LAMP CURRENT FOR A
TYPICAL DISPLAY.
CCFL
CURRENT GIVES
SHUTDOWN
LT1184F Floating CCFL with Potentiometer Control of Lamp Current
C7, 1 F
BAT85
U
D5
1
2
3
4
5
6
7
8
N
I
DIO
CCFL V
AGND
SHDN
NC
CCFL
PGND
NC
CCFL
C5
1000pF
LT1184F
C
CCFL V
ROYER
R3
100k
BULB
R2
220k
BAT
REF
V
SW
NC
NC
IN
16
15
14
13
12
11
10
9
Q2*
3
UP TO 6mA
10
0.068 F
LT1182/LT1183/LT1184/LT1184F
15.4k
LAMP
+
C1*
1%
R4
2
L2
100 H
6
C3B
2.2 F
35V
Q1*
1
10 TURN
C2
27pF
3kV
50k
1N5818
R5
4
D1
5
L1
1182 TA03
R1
750
+
+
C4
2.2 F
C3A
2.2 F
35V
V
IN
3V
BAT
8V TO 28V
21