LM2756 datasheet(8/25 Pages) TI1

Part #	LM2756

Description	Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in micro SMD

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Manufacturer	TI1 [Texas Instruments]

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VIN (V)

21.00

20.50

20.00

19.50

19.00

18.50

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = +25°C

TA = +85°C

TA = -30°C

VIN (V)

20.50

20.00

19.50

19.00

18.50

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = +85°C

TA = +25°C

TA = -30°C

VIN (V)

200

175

150

125

100

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VLED = 3.0V

VLED = 3.6V

VLED = 3.3V

BankA = 6 LEDs

VIN (V)

21.50

21.00

20.50

20.00

19.50

19.00

18.50

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = +25°C

TA = +85°C

TA = -30°C

VIN (V)

100

90

80

70

60

50

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VLED = 3.0V

VLED = 3.6V

VLED = 3.3V

BankA = 6 LEDs

VIN (V)

100

90

80

70

60

50

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

4 LEDs

VLED = 3.3V

5 LEDs

6 LEDs

LM2756

SNVS504B – JULY 2007 – REVISED DECEMBER 2007

www.ti.com

Typical Performance Characteristics

Unless otherwise specified: TA = 25°C; VIN = 3.6V; VHWEN = VIN; VLEDxA = VLEDxB = VLED1C = 3.6V; RSET = 11.8kΩ; C1=C2= CIN =

CVOUT = 1µF; ENA = ENB = ENC = '1'.

LED Drive Efficiency

vs

Input Voltage

Input Current

GroupA Diode Current

vs

Input Voltage

GroupB Diode Current

GroupC Diode Current

vs

Input Voltage

8

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