TPS92690 datasheet(7/28 Pages) TI

No de pièce	TPS92690

Description	N-Channel Controller for Dimmable LED Drives with Low-Side Current Sense

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Fabricant	TI [Texas Instruments]

Site Internet	http://www.ti.com

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200

400

600

800

20

40

60

80

100

PWM Duty Cycle (%)

1A Nominal

G000

200

400

600

800

0.0

0.5

1.0

1.5

2.0

2.5

IADJ Voltage (V)

G000

495

497

499

501

503

505

10

15

20

25

30

35

Input Voltage (V)

12 LEDs

G000

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500

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700

800

900

1000

40

60

80

100

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160

RT Resistance (k

Ω)

G000

85

87

89

91

93

95

8

12

16

20

24

28

32

36

Input Voltage (V)

12 LEDs

500mA

G000

85

87

89

91

93

95

8

10

12

14

16

Input Voltage (V)

6 LEDs

500mA

G000

TPS92690

www.ti.com

SLVSBK3 – DECEMBER 2012

TYPICAL CHARACTERISTICS

Unless otherwise noted, –40°C

≤ TA = TJ≤ +125°C, VIN = 14 V, CBYP = 2.2 µF, CCOMP = 0.1 µF

Figure 1. Boost Efficiency vs Input Voltage

Figure 2. Boost Efficiency vs Input Voltage

Figure 3. Boost Line Regulation

Figure 4. Switching Frequency vs RT Resistance

Figure 5. 160 Hz Boost PWM Dimming

Figure 6. IADJ Analog Dimming (RCS = 0.25 Ω)

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