WS2821

Parallel-Single wire-Three channels

256 Gray level Constant current LED driven IC

http://www.world-semi.com

Parameter

Symbol

Range

Unit

Logical power supply

voltage

Vcc

-0.5～+5.5

V

Output port bearing voltage

Vout

24

V

Logical input voltage

Vi

-0.5～VDD+0.5

V

LED driven output current

Iol

60

mA

Power consumption

PD

<250

mW

Working temperature

Topt

-25～+85

℃

Storage temperature

Tstg

-55~+150

℃

ESD

>2K

V

Parameter

Symbol

Testing Condition

Min.

Typical Max.

Unit

Power supply

voltage

VCC

4

24

V

Quiescent current

ICC

VCC=5V,REXT Non

connection

1.5

mA

VCC=5V,REXT=500R

6.0

VCC=5V,REXT=2K

3.0

R/G/B OUT

output current

IOUT

VCC=5V

3

60

mA

R/G/B OUT port

leakage current

Ileak

VCC=5V

1

uA

Vout inflection

point

voltage(IPV)

Vout

IOUT=19mA

0.9

V

IOUT=40mA

1.2

DAI port

reversal

voltage

VIH

VCC=5V

3

V

VIL

1.7

REXT port

voltage

VREXT

DAI=VCC=5V

Constant current parameter setting：

When the REXT being non connected,R/G/B OUT three port’s output current is 19mA(default

value),users can connect the resistor at the REXT as well.Set the R/G/B OUT three port’s current,its range

is 19mA～60mA,relations between the output current value and the resistance value are as followings: