WS2821

Parallel-Single wire-Three channels

256 Gray level Constant current LED driven IC

http://www.world-semi.com

4

10

3

15

)

(









EXT

REF

REF

OUT

R

V

V

mA

I

description

Min

Typ

Max

unit

MTBP

88

NS

1000000

us

BREAK

88

88

1000000

us

MAB

4

8

12

us

Framce width

44

us

Sart Bit/Data Bit

4

us

Stop Bit

8

us

MTBF

0

NS

1000000

us

Note:NS means Not specified and designer definable

Each data packet consists of several data frames, each frame of data including 1 low start bit, 8 data bits,

2 stop bit high level. Control data is 8 bits, the level combinations from 00000000 to 11111111,total of

256 state (corresponding decimal number 0 ~ 255), control the brightness of light, can produce 256

brightness levels, 00000000 (0) corresponding to light the darkest, 11111111 (255) corresponding to the

brightest lights. Packet first frames, lamps and lanterns corresponding to the first channel, second frames

corresponding to the second channel lamp, and so on, 512nd frames corresponding to the 512nd channel

lamp, lamp channel address can be set on the lamp.