LT1184_15 datasheet(6/24 Pages) LINER

Part #	LT1184

Description	CCFL/LCD Contrast Switching Regulators

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT1182/LT1183/LT1184/LT1184F

TYPICAL PERFORMANCE CHARACTERISTICS

ICCFL Summing Voltage

vs Temperature

TEMPERATURE (

°C)

0.53

0.52

0.51

0.50

0.49

0.48

0.47

0.46

0.45

0.44

0.43

0.42

0.41

0.40

0.39

0.38

–25

25

75

125

LT1182 • G10

175

–50

–75

0

50

100

150

VIN = 5V

VIN = 3V

VIN = 30V

∆CCFL VC Source Current for

∆ICCFL Programming Current

vs Temperature

CCFL VC to DIO Current Servo

Ratio vs Temperature

ICCFL PROGRAMMING CURRENT (µA)

5

4

3

2

1

0

–1

–2

–3

–4

–5

–6

–7

–8

–9

–10

40

80

120

160

LT1182 • G11

200

20

0

60

100

140

180

T = –55

°C

T = 25

°C

T = 125

°C

TEMPERATURE (

°C)

–3

–1

1

0

–2

10

9

6

8

7

5

3

2

4

–75

125 150

–25 0

–50

25 50

75 100

175

CCFL VC = 0.5V

CCFL VC = 1.0V

CCFL VC = 1.5V

LT1182 • G12

TEMPERATURE (

°C)

0

0.4

0.2

0.8

0.6

1.2

1.0

–25

25

75

125

LT1182 • G14

175

–50

–75

0

50

100

150

I(DIO) = 1mA

I(DIO) = 5mA

I(DIO) = 10mA

Positive DIO Voltage

vs Temperature

Negative DIO Voltage

vs Temperature

CCFL VC High Clamp Voltage

vs Temperature

CCFL VC Low Clamp Voltage

vs Temperature

TEMPERATURE (

°C)

0

0.10

0.05

0.20

0.15

0.30

0.25

–25

25

75

125

LT1182 • G17

175

–50

–75

0

50

100

150

ICCFL Summing Voltage

Load Regulation

CCFL VC Offset Sink Current

vs Temperature

TEMPERATURE (

°C)

–75

1.7

1.8

2.0

2.1

2.2

2.4

–50

50

100

LT1182 • G18

1.9

2.3

25

150 175

–25 0

75

125

TEMPERATURE (

°C)

4.80

4.90

4.85

5.00

4.95

5.10

5.05

–25

25

75

125

LT1182 • G13

175

–50

–75

0

50

100

150

ICCFL = 10µA

ICCFL = 50µA

ICCFL = 100µA

TEMPERATURE (

°C)

–75

101

103

125

LT1182 • G16

99

97

95

–25

25

75

175

100

102

98

96

100

–50

0

50

150

I(DIO) = 1mA

I(DIO) = 5mA

I(DIO) = 10mA

TEMPERATURE (

°C)

–75

1.2

1.6

125

LT1182 • G15

0.8

0.4

0

–25

25

75

175

1.0

1.4

0.6

0.2

100

–50

0

50

150

I(DIO) = 1mA

I(DIO) = 5mA

I(DIO) = 10mA

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