User Manual

WS2811
Signal line 256 Gray level 3 channal
Constant current LED drive IC
http://www.world-semi.com
Electrical Characteristics（T
A
=-20～+70℃，V
DD
=4.5～5.5V ,V
SS
=0V ,unless otherwise specified）
Prameter Smybol conditions Min Tpy Max Unit
I
OL
ROUT
——
18.5 —— mA
Low voltage
output current
I
dout
V o=0.4V，D
OUT
10
—— —— mA
Input current I
I
V
I
=V
DD
/V
SS
——
—— ±1 µA
V
IH
D
IN
，SET
0.7V
DD
—— —— V
Input voltage level
V
IL
D
IN
，SET
——
—— 0.3 V
DD
V
Hysteresis voltage V
H
D
IN
，SET
——
0.35 —— V
Switching characteristics（T
A
=-20～+70℃，V
DD
=4.5～5.5V ,V
SS
=0V ,unless otherwise specified）
Prameter Symbol Condition Min Tpy Max Unit
Fosc1 —— —— 400 —— KHz
Operation
frequency
Fosc2 —— —— 800 —— KHz
Transmission
delay time
t
PLZ
CL=15pF,DIN→
DOUT,RL=10KΩ
—— —— 300 ns
Fall time t
THZ
CL=300pF,OUTR/
OUTG/OUTB
—— —— 120 µs
Data transmission
rate
F
MAX
Duty ratio50% 400 —— —— Kbps
Input capcity C
I
—— —— —— 15 pF
Low Speed mode time
T0H 0 code,high voltage time 0.5 µs ±150ns
T1H 1 code,high voltage time 1.2 µs ±150ns
T0L 0 code,low voltage time 2.0 µs ±150ns
T1L 1 code,low voltage time 1.3 µs ±150ns
RES low voltage time Above 50µs
Note: It is one half of the time when high speed mode(reset time unchanged)