显示标签为“ws2812b led”的博文。显示所有博文
显示标签为“ws2812b led”的博文。显示所有博文

2016年4月27日星期三

WS2813 LED

WS2813 Signal Break-point Continuous Transmission LED

Refer to WS2813 LED, everyone may think of the ws2812b led,though they are all 3ch integrated digital rgb led (built-in ic led),but they have much different,firstly,ws2813 is dual-signal wire version in ws series leds,secondly the ws2813 have one more function:signal continuous transfer when there some break led,which can greatly improve the stability of the digital leds;the third one is tha the capacitance and resistance also package inside the led,this also will be much convenience for the pcb component designer,and reduce some SMT ,and save many space for other element.




General description
WS2813 LED is an intelligent control LED light source that the control circuit and RGB chip are integrated in a package
of 5050 components. Its internal include intelligent digital port data latch and signal reshaping amplification drive circuit.
Also include a precision internal oscillator and a 12V voltage programmable constant current control part,
which achieves highly consistent color effect.
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN port receive
data from controller, the first pixel collect initial 24bit data then sent to the internal data latch, the other data which
reshaping by the internal signal reshaping amplification circuit sent to the next cascade pixel through the DO port. After
transmission for each pixel, the signal to reduce 24bit. Every pixel adopts auto-reshaping transmit technology, making
the pixel cascade numbers are not limited to the signal transmission, only relate to the speed of signal transmission.
The BIN receives the data signal, and then compare the data with the DIN side after phagocytosis of 24bit data, if DIN
do NOT receive the signal, then switching to BIN for receiving the input signal, which ensure that any the IC's damage
does not affect the signal cascade transmission and make the BIN in state of receiving signal until restart after power-off.
Refresh Frequency updates to 2KHz, Low Frame Frequency and no Flicker appear in HD Video Camera.
250us or more of reset time, it won’t cause wrong reset while interruption, it supports the lower frequency and
inexpensive MCU.
There’re in a choice of 18mA or 5mA current version, and also in a choice of high brightness or cost-effective version.
That is to say, WS2813 is provided with four versions
Features and Benefits
 The control circuit and the LED share the only power source.
 The control circuit and RGB chip are integrated in a 5050 components, to form an external control pixel.
 Using the built-in signal reshaping circuit to achieve the signal waveform shaping, and no distortion of waveform of
signal takes place.
 Built-in power-on reset and brown-out reset circuits.
 The gray levels of each pixel are of 256 levels, which achieves “256*256*256=16777216” full-color display, and
the refresh frequency reaches to 2KHz/s.
 Serial cascade interface, data receiving and decoding depend on just one signal line.
 Dual-signal wires version, signal break-point continuous transmission.
 Any two point the distance more than 3m transmission signal without any increase circuit.
 When the refresh rate is 30fps, cascade numbers are far more than 1024 points.
 Data transmitting at speeds of up to 800Kbps.
 Good color consistency reliability, high cost-effective.
Applications
 Guardrail tube series, point light display series, flexible/rigid strips series, module series applications.
 Lighting stage costumes, innovative gadgets or any other electronic products.

Datasheet of WS2813 LED

http://www.led-color.com/upload/201604/WS2813 LED.pdf

2015年7月21日星期二

ws2812 led smd chip black face

 ws2812 smd led black face leds

WS2812B is popular last two years,and most of us are using the white face ws2812b smd leds,
but sometimes we need some more choice for the black finish smd led,here are the new choice for you,it is the best chioce to match the black pcb for ws2812b led strips.



Features and Benefits
Intelligent reverse connect protection, the power supply reverse connection does not damage the IC.
The control circuit and the LED share the only power source.
Control circuit and RGB chip are integrated in a package of 5050 components, form a complete control of pixel point.
Built-in signal reshaping circuit, after wave reshaping to the next driver, ensure wave-form distortion not accumulate.
Built-in electric reset circuit and power lost reset circuit.
Each pixel of the three primary color can achieve 256 brightness display, completed 16777216 color full color display, and scan frequency not less than 400Hz/s.
Cascading port transmission signal by single line.
Any two point the distance more than 5m transmission signal without any increase circuit.
When the refresh rate is 30fps, cascade number are not less than1024 points.
Send data at speeds of 800Kbps. 
The color of the light were highly consistent, cost-effective..  
Applications 
Full-color module, Full color soft lights a lamp strip.
LED decorative lighting, Indoor/outdoor LED video irregular screen. 
General description
WS2812B is a intelligent control LED light source that the control circuit and RGB chip are integrated in a package of 5050 components. It internal include intelligent digital port data latch and signal reshaping amplification drive circuit. Also include a precision internal oscillator and a 12V voltage programmable constant curre-nt control part, effectively ensuring the pixel point light color height consistent.
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN  port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch,   the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade  pixel through the DO port. After transmission for each pixel,the signal to reduce 24bit. pixel adopt auto resha-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend on the speed of signal transmission.
    LED with low driving voltage, environmental protection and energy saving, high brightness, scattering angle is large, good consistency, low power, long life and other advantages. The control chip integrated in LED   above becoming more simple circuit, small volume, convenient installation.

Mechanical Dimensions


PIN configuration 


PIN function
NO.
Symbol
Function description 
1
VDD
Power supply LED
2
DOUT
Control data signal output
3
VSS
Ground
4
DIN
Control data signal input

Absolute Maximum Ratings
Prameter
Symbol
Ratings
Unit
Power supply voltage
VDD
+3.5~+5.3
V
Input voltage
VI
-0.5~VDD+0.5
V
Operation junction temperature
Topt
-25~+80
Storage temperature range
Tstg
-55~+150
Electrical CharacteristicsTA=-20~+70℃,VDD=4.5~5.5V,VSS=0V,unless otherwise specified
Prameter
Smybol
conditions
Min
Tpy
Max
Unit
Input current
II
VI=VDD/VSS
——
——
±1
µA
Input voltage level
VIH
DIN,SET
0.7VDD
——
——
V
VIL
DIN,SET
——
——
0.3 VDD
V
Hysteresis voltage
VH
DIN,SET
——
0.35
——
V
Switching characteristicsTA=-20~+70℃,VDD=4.5~5.5V,VSS=0V,unless otherwise specified
Prameter
Symbol
Condition
Min
Tpy
Max
Unit
Operation frequency
Fosc2
——
——
800
——
KHz
Transmission delay time
tPLZ
CL=15pF,DIN→
DOUT,RL=10KΩ
——
——
300
ns
Fall time
tTHZ
CL=300pF,OUTR/OUTG/OUTB
——
——
120
µs
Data transmission rate
FMAX
Duty ratio50%
400
——
——
Kbps
Input capcity
CI
——
——
——
15
pF


LED characteristic parameter
Emitting color
Model
Wavelength(nm)
Luminous intensity(mcd)
Voltage(V)
Red
13CBAUP
620-625
390-420
2.0-2.2
Green
13CGAUP
522-525
660-720
3.0-3.4
Blue
10R1MUX
465-467
180-200
3.0-3.4
Data transfer timeTH+TL=1.25µs±600ns)
T0H
0 code ,high voltage time
0.4us
±150ns
T1H
1 code ,high voltage time
0.8us
±150ns
T0L
0 code , low voltage time
0.85us
±150ns
T1L
1 code ,low voltage time
0.45us
±150ns
RES
low voltage time
Above 50µs







Data transmission method


Note: The data of D1 is send by MCU,and D2, D3, D4 through pixel internal reshaping amplification to transmit.
Composition of 24bit data:
G7
G6
G5
G4
G3
G2
G1
G0
R7
R6
R5
R4
R3
R2
R1
R0
B7
B6
B5
B4
B3
B2
B1
B0
Note: Follow the order of GRB to sent data and the high bit sent at first.

Typical application circuit: