Digitally Adjustable LCD Bias Supplies

6

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_____________________________Typical Operating Characteristics (continued)

0.70

0.75

0.80

0.85

0.90

0.95

1.00

-26

-24

-22

-20

-18

-16

-14

-12

EFFICIENCY vs. OUTPUT VOLTAGE

OUTPUT VOLTAGE (V)

-10mA

-20mA

0.70

0.75

0.80

0.85

0.90

0.95

1.00

2

4

6

8

10

12

14

16

18

20

+20V, +10mA

-20V, -10mA

0

20

40

60

80

100

120

140

160

180

200

0

1

234

5

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

100

125

150

175

200

-40

-20

0

20

40

60

80

SUPPLY CURRENT vs. TEMPERATURE

TEMPERATURE (°C)

1.49

1.50

1.51

-40

-20

0

20

40

60

80

REFERENCE VOLTAGE

vs. TEMPERATURE

TEMPERATURE (°C)

0

2

4

6

8

10

12

14

16

18

20

0

1

234

5

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

6

8

10

12

14

16

18

20

-40

-20

0

20

40

60

80

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

18.0

18.5

19.0

19.5

20.0

20.5

21.0

21.5

22.0

2.5

3.0

3.5

4.0

4.5

5.0

k-FACTOR vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

18.0

18.5

19.0

19.5

20.0

20.5

21.0

21.5

22.0

-60 -40

-20

0

20

40

60

80

100

k-FACTOR vs. TEMPERATURE

TEMPERATURE (°C)