Preliminary Datasheet

LP3133

LP3133 – Ver. 1.0 Datasheet

Feb.-2008

Page 2 of 5

Functional Pin Description

Pa rt No .

P a cka g e Ty pe

P i n Co nf ig u r at io ns

LP3133

QFN-16

VOUT

EN

LED2

EN

15

GND

6

5

13

8

PGND

PGND

16

7

LED1

VIN

14

PIN

NAME

DESCRIPTION

QFN-16

1,2,9,10,11,12

NC

No Internal Connection.

3

LED4

LED4 cathode terminal.

4

LED3

LED3 cathode terminal.

5

LED2

LED2 cathode terminal.

6

LED1

LED1 cathode terminal

7/14

PGND/GND

Ground.

8

Vout

Output Voltage Source for connection to the LED anodes.

13

VIN

Power Supply.

15/16

EN/PWM

Chip Enable(active High).and connects to a GPIO of MCU,the GPIO

supply a PWM singal dimming method to control the brightness(0-20mA) of

white LEDs and the PWM frequency from 200Hz to 10KHz,the duty from

0% to 100%.the typical frequency is 2KHz.

Function Block Diagram