23

LT1182/LT1183/LT1184/LT1184F

LT1182 LCD Contrast Positive Boost Converter

C13

2.2

µF

35V

BAT

8V TO 28V

POSCON

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

DIO

AGND

SHDN

BULB

BAT

ROYER

FBP

FBN

CCFL

PGND

LCD

PGND

LT1182

+

C8

0.068

µF R7

33K

R13

8.45k

1%

R14

1.21k

1%

C4

2.2

µF

≥ 3V

R12

20k

+

C10

0.01

µF

L3

50

µH

COILTRONICS CTX50-4

D5

1N914

+

C11

22

µF

35V

1182 TA12

LT1182 LCD Contrast Positive Boost/Charge Pump Converter

C13

2.2

µF

35V

BAT

8V TO 28V

POSCON

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

DIO

AGND

SHDN

BULB

BAT

ROYER

FBP

FBN

CCFL

PGND

LCD

PGND

LT1182

+

C8

0.068

µF R7

33K

R13

8.45k

1%

R14

1.21k

1%

C4

2.2

µF

≥ 3V

R12

20k

+

C10

0.01

µF

1182 TA13

L3

50

µH

COILTRONICS CTX50-4

D4

1N914

C11

22

µF

35V

D5

1N914

+

C11

22

µF

35V

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.