RT9284A15GJ5 datasheet(2/14 Pages) RICHTEK

Part #	RT9284A15GJ5

Description	Tiny Package, High Performance, Constant Current Switching Regulator for White LED

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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RT9284A/B

www.richtek.com

DS9284A/B-05 August 2007

Typical Application Circuit

Figure 1. Application for Driving 3 Series WLEDs

Figure 2. Application for Driving 4 Series WLEDs

Figure 4. Application for Constant Output Voltage

VDD

GND

LX

FB

OVP

RT9284

V

IN

EN

6

4

2

3

5

1

I

LED

+

Dimming

Control

2.7V to 5.5V

C1

1uF

C2

1uF/16V

R1

D1

SS0520

L1

4.7uH to 22uH

100Hz-100kHz

OVP

15V

Figure 3. Application for Driving 5 Series WLEDs

VDD

GND

LX

FB

OVP

RT9284A

V

IN

EN

6

4

2

3

5

1

+

2.7V to 5.5V

C1

1uF

C2

R2

D1

SS0520

L1

4.7uH to 22uH

R1

130k

15k

V

OUT

12V

OVP

15V

1uF/16V

V

FB = 1.235V

VDD

GND

LX

FB

OVP

RT9284

V

IN

EN

6

4

2

3

5

1

I

LED

+

Dimming

Control

2.7V to 5.5V

C1

1uF

C2

R1

D1

SS0520

L1

4.7uH to 22uH

100Hz-100kHz

1uF/25V

OVP

18V

OVP 15V

R2

600k

VDD

GND

LX

FB

OVP

RT9284B

V

IN

EN

6

4

2

3

5

1

I

LED

+

Dimming

Control

2.7V to 5.5V

C1

1uF

C2

1uF/25V

R1

D1

SS0520

L1

4.7uH to 22uH

100Hz-100kHz

OVP

20V

V

FB

= 0.25V

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