W-52TDI-G3 datasheet(9/11 Pages) COPAL

Part #	W-52TDI-G3

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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9 / 11 page

W-52

9

TYPICAL APPLICATION CIRCUITS

(The application diagrams below are shown for the TSOT 23 packages.)

Figure 16. Two LEDs with DC Level Dimming Control

2.5 V DC

DIMMING

CONTROL

15 mA

4

1.50 k

60.40 k

6.8 H

2

3

1

6

5

SW

VIN

RSET

D1

C2

2.2 F

C1

4.7 F

VIN

W-52

LED

GND

2.5 V DC

DIMMING

CONTROL

15 mA

4

1.50 k

60.40 k

6.8 H

2

3

1

6

5

SW

VIN

RSET

D1

C2

1 F

C1

4.7 F

VIN

W-52

LED

GND

Figure 17. Three LEDs with DC Level Dimming Control

15 mA

4

1.50 k

6.8 H

2

3

1

6

5

SW

VIN

RSET

D1

C2

1 F

C1

4.7 F

VIN

PWM

DIMMING

CONTROL

W-52

LED

GND

Figure 18. Efficiency

Three LEDs

LED CURRENT (mA)

20

15

10

5

0

60

65

70

75

80

85

LED CURRENT (mA)

Figure 19. Four LEDs with PWM Dimming Control

Figure 20. Efficiency

Four LEDs

SHDN

L1

RSET

VIN = 4.2 V

VIN = 3.0 V

20

15

10

5

0

60

65

70

75

80

85

VIN = 4.2 V

VIN = 3.0 V

L1

SHDN

RSET

SHDN

RSET

L1

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W-52TDI-G3 Datasheet(PDF) 9 Page - Copal Electronics

W-52TDI-G3 Datasheet(HTML) 9 Page - Copal Electronics

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