CAT4004A datasheet(5/11 Pages) ONSEMI

Part #	CAT4004A

Description	Constant Current LED Driver with 32 Dimming Levels and Rset

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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CAT4002A, CAT4004A

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TYPICAL PERFORMANCE CHARACTERISTICS

(CAT4002A, VIN = 4 V, VF = 3.3 V, IOUT = 50 mA (2 LEDs at 25 mA), CIN = 1 mF, TAMB = 25°C unless otherwise specified.)

Figure 9. Dropout Characteristics

Figure 10. Efficiency vs. Input Voltage

LED PIN VOLTAGE (mV)

INPUT VOLTAGE (V)

300

200

100

0

5

10

20

25

30

2.0

3.0

3.5

4.0

4.5

5.0

5.5

50

60

70

80

100

Figure 11. Power Up Waveform

Figure 12. Power Down Waveform

Figure 13. Line Transient Waveform

Figure 14. Dimming Levels

25 mA

1 mA

250

150

50

15

90

2.5

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