RT9301

3

DS9301-02

March 2007

www.richtek.com

Function Block Diagram

Functional Pin Description

Pin

Name

Function

1

LED3

RGB or White LED cathode connection pin. 2mA to 50mA Current flows into LED. Floating or

connection to ground is used to disable this pin.

2

GND

Ground Pin.

3

VIN

Power Input Pin.

4

ISET3

Current setting for LED3. Connect to GND if not use.

5

ISET2

Current setting for LED2. Connect to GND if not use.

6

ISET1

Current setting for LED1. Connect to GND if not use.

7

LED1

RGB or White LED cathode connection pin. 2mA to 50mA Current flows into LED. Floating or

connection to ground is used to disable this pin.

8

LED2

RGB or White LED cathode connection pin. 2mA to 50mA Current flows into LED. Floating or

connection to ground is used to disable this pin.

Current Source

UVLO

VIN

GND

LED1

LED2

LED3

+

-

V

REF

+

-

V

REF

ISET1

ISET2

ISET3

+

-

V

REF