LM3519 datasheet(6/20 Pages) TI1

Numer części	LM3519

Szczegółowy opis	High Frequency Boost White LED Driver with High-Speed PWM Brightness Control

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Producent	TI1 [Texas Instruments]

Strona internetowa	http://www.ti.com

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5

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65

75

85

95

DUTY CYCLE (%)

2

5

8

11

14

17

20

23

20 kHz

50 kHz

30 kHz

EN = 20 kHz, 30 kHz, and 50 kHz

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25

35

45

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65

75

85

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DUTY CYCLE (%)

1

4

7

10

13

16

19

22

EN = 100 Hz and 500 Hz

5

15

25

35

45

55

65

75

85

95

DUTY CYCLE (%)

1

4

7

10

13

16

19

22

EN =100 Hz and 500 Hz

19.5

20.0

20.5

21.0

21.5

22.0

2.7

3.0

3.3

3.6

3.9

4.2

4.5

VIN (V)

25°C

85°C

-40°C

2.5

3.0

3.5

4.0

4.5

5.0

5.5

VIN (V)

1 PH

3.3 PH

1.5 PH

2.2 PH

16.0

18.0

20.0

22.0

24.0

26.0

28.0

30.0

4 LEDs

1.5 PH

2.5

3.0

3.5

4.0

4.5

5.0

5.5

VIN (V)

3.3 PH

16.0

18.0

20.0

22.0

24.0

26.0

28.0

32.0

2.2 PH

1 PH

30.0

3 LEDs

LM3519

SNVS394A – AUGUST 2005 – REVISED SEPTEMBER 2005

www.ti.com

Typical Performance Characteristics (continued)

(See Figure 1: VIN = 3.6V, CIN = 4.7µF and COUT = 1µF, L = 2.2µH and 4 LEDs. TA = +25°C, unless otherwise stated.)

IOUT

vs

VIN

IOUT

vs

PWM Duty Cycle

VIN

(VIN = 3.6V, L = 2.2µH)

IOUT

vs

PWM Duty Cycle

(VIN= 3.6V, L = 2.2µH)

(VIN = 3.6V, L = 1µH)

6

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