LT1768 데이터 시트보기 (PDF) - Linear Technology

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LT1768

High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime

Linear Technology 

LT1768

TYPICAL PERFOR A CE CHARACTERISTICS

VREF vs Temperature

5.10

IREF = –1mA

5.08

5.06

5.04

5.02

5.00

4.98

4.96

4.94

4.92

4.90

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1768 G01

VRMIN, VRMAX vs Temperature

1.30 IRMIN = –100µA

1.29 IRMAX = –100µA

1.28

1.27

VRMIN(V)

1.26

1.25

VRMAX(V)

1.24

1.23

1.22

1.21

1.20

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1768 G02

Supply Current vs Input Voltage

10

8

6

4

2

0

0

5

10

15

20

25

INPUT VOLTAGE (V)

1768 G04

SHDN Pull-Up Current

vs Input Voltage

10

VSHDN = 0V

8

6

4

2

0

0

5

10

15

20

25

INPUT VOLTAGE (V)

1768 G07

Supply Current vs Temperature

7.40

7.30

7.20

7.10

7.00

6.90

6.80

6.70

6.60

6.50

6.40

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1768 G05

Shutdown Threshold Voltage vs

Temperature

2.00

1.80

1.60

VSHDN OFF TO ON

1.40

1.20

1.00

0.80

VSHDN ON TO OFF

0.60

0.40

0.20

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1768 G08

Supply Current in Shutdown vs

Temperature

80

VSHDN = 0V

76

72

68

64

60

56

52

48

44

40

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1768 G03

Supply Current in Shutdown vs

Input Voltage

100

VSHDN = 0V

80

60

40

20

0

0

5

10

15

20

25

INPUT VOLTAGE (V)

1768 G06

Undervoltage Lockout Threshold

vs Temperature

8.20

8.10

8.00

VUVL OFF TO ON

7.90

7.80

7.70

7.60

7.50

7.40

VUVL ON TO OFF

7.30

7.20

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1768 G09

4

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