W-52 datasheet(5/11 Pages) COPAL

Part #	W-52

Description	CMOS White LED Driver

Download	11 Pages

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Manufacturer	COPAL [Copal Electronics]

Direct Link	http://www.nidec-copal-electronics.com/e

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5 / 11 page

W-52

5

TYPICAL CHARACTERISTICS

(VIN = 3.6 V, TAMB =25 C, CIN = 4.7 F, COUT =1 F, L = 6.8 H, unless otherwise specified.)

Figure 8. Switch Resistance vs. Input Voltage

Figure 9. Switch Resistance vs. Temperature

(

E

R

U

T

A

R

E

P

M

E

T

)

V

(

E

G

A

T

L

O

V

T

U

P

N

I

C)

6

5

4

3

2

0

0.2

0.4

0.6

0.8

1.0

125

100

75

50

25

0

25

50

0

0.2

0.4

0.6

0.8

1.0

Figure 10. LED Pin Voltage vs. LED Current

Figure 11. VSW,IL,&VOUT Signal Waveforms

LED CURRENT (mA)

40

32

24

16

8

0

50

100

150

200

250

300

Figure 12. Efficiency vs. Input Voltage

Figure 13. PWM on SHDN Pin Waveform

INPUT VOLTAGE (V)

6

5

4

3

2

60

65

70

75

80

85

VIN =3V

4 LEDs at 15 mA

VOUT =13V

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