LT1373
U
TYPICAL APPLICATIO S
90% Efficient CCFL Supply
5mA MAX
Two Li-Ion Cells to 5V SEPIC Conveter
V
IN
4V TO 9V
LAMP
C2
27pF
D1
1N4148
10
T1
V
L1A
33µH
IN
5
4
3
2
1
5
C2
2.2µF
D1
4.5V
MBRS130LT3
+
V
TO 30V
IN
•
†
4
8
2
V
OUT
5V
10µF
ON
C1
0.1µF
V
S/S
SW
FB
OFF
C1
•
R2
LT1373
+
L1B
33µH
75k
1%
33µF
330Ω
1N5818
20V
+
Q1
Q2
C3
100µF
GND
6, 7
V
C
1
10V
R3
24.9k
1%
R1
5k
C4
0.01µF
2.7V TO
5.5V
D2
1N4148
L1
100µH
+
2.2µF
5
V
562Ω*
†MAX I
IN
10k
OUT
V
4
8
ON
S/S
V
SW
I
OFF
OUT
IN
C1 = AVX TPSD 336M020R0200
C2 = TOKIN 1E225ZY5U-C203-F
C3 = AVX TPSD 107M010R0100
L1 = COILTRONICS CTX33-2, SINGLE
INDUCTOR WITH TWO WINDINGS
20k
DIMMING
0.45A 4V
0.55A 5V
0.65A 7V
0.72A 9V
LT1373
2
V
FB
LT1373 • TA07
GND
V
C
0.1µF
22k
1N4148
6, 7
1
+
2µF
OPTIONAL REMOTE
DIMMING
LT1372 • TA06
C1 = WIMA MKP-20
L1 = COILCRAFT D03316-104
CCFL BACKLIGHT APPLICATION CIRCUITS
CONTAINED IN THIS DATA SHEET ARE
Q1, Q2 = ZETEX ZTX849 OR ROHM 2SC5001 COVERED BY U.S. PATENT NUMBER 5408162
T1 = COILTRONICS CTX 110609
* = 1% FILM RESISTOR
AND OTHER PATENTS PENDING
DO NOT SUBSTITUTE COMPONENTS
COILTRONICS (407) 241-7876
COILCRAFT (708) 639-6400
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IN
1373fb LT/TP 0200 2K REV B • PRINTED IN THE USA
LINEAR TECHNOLOGY CORPORATION 1995
12 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
Linear [ Linear ]
