FAN5645 datasheet(8/10 Pages) FAIRCHILD

Teilenummer	FAN5645

Bauteilbeschribung	Indicator LED Blinker with Single-Wire Interface

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Hersteller	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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FAN5645 • Rev. 1.0.0

8

Typical Performance Characteristics

Unless otherwise noted, VIN = VEN = 3.6V, TA = 25°C, white LED with Vf = 3.3V at ILED = 20mA.

-40°C

+85°C

+25°C

19.80

19.85

19.90

19.95

20.00

20.05

20.10

20.15

20.20

2.5

3.0

3.5

4.0

4.5

5.0

5.5

VIN(V)

Vf=2.1V

0

5

10

15

20

25

0

0.010.020.030.040.050.060.070.080.090.10

VIN(V)-VOUT(V)

-40°C

+85°C

+25°C

Figure 9. Line Regulation

Figure 10. LED Current vs. Headroom Voltage

0

2

4

6

8

10

12

14

16

18

20

22

10

100

1000

RSET(k )

385

390

395

400

405

410

415

420

425

430

0

2

4

6

8

10

12

14

16

18

20

LED Current (mA)

-40°C

+85°C

+25°C

Figure 11. LED Current vs. RSET Resistance

Figure 12. Current Mirror Ratio vs. Output Current

Horizontal Scale: 20µs/div.

VIN=3.0V

ILED(AC), 0.1mA/div. on top of 20mA

VIN=3.7V

Vf=2.5V

Horizontal Scale: 500µs/div.

ILED=0mA

VCTRL=1.2V

ILED=20mA

VCTRL=0.4V

Figure 13. Line Transient Response

Figure 14. Active Modes Delay

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