WS2821

Parallel-Single wire-Three channels

256 Gray level Constant current LED driven IC

http://www.world-semi.com

PIN configuration

PIN Function

Pin NO.

Symbol

Pin Name

Pin description

1

GND

Chip Ground

Ground

2

NC

Non connection

Non connection

3

ADRO

Address output

Cascade address output port

4

ROUT

Driven output

R（Red LED）PWM control output,hight voltage PIN

5

GOUT

G（Green LED）PWM control output,hight voltage PIN

6

BOUT

B（Blue LED）PWM control output,hight voltage PIN

7

GND

Chip Ground

External adjustable resistor being connected to the

ground,control OUT（R/G/B）output current

8

DAI

Data input

Gray control data signal input port

9

REXT

Output current set port

External resistor,connect with the REXT and GND,used

to adjust the R/G/B OUT output current value

10

SPWM

PWM

output

polarity reversal

Default”1”:Three

channel

normal

output,(Non

connection or connect with VCC);

For”0”,(SPWM connect with the GND),three channels

output

polarity reversal

11

ADRI

Address input

Cascade address input port

12

VCC

Chip power supply

Power supply,typical application is 5V

13

NC

Non connection

Non connection

14

NC

Non connection

Non connection