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

l Intelligent reverse connect protection, the power supply reverse connection does not damage the IC.

l The control circuit and the LED share the only power source.

l Control circuit and RGB chip are integrated in a package of 5050 components, form a complete control of pixel point.

l Built-in signal reshaping circuit, after wave reshaping to the next driver, ensure wave-form distortion not accumulate.

l Built-in electric reset circuit and power lost reset circuit.

l 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.

l Cascading port transmission signal by single line.

l Any two point the distance more than 5m transmission signal without any increase circuit.

l When the refresh rate is 30fps, cascade number are not less than1024 points.

l Send data at speeds of 800Kbps. 

l The color of the light were highly consistent, cost-effective..  

Applications 

l Full-color module, Full color soft lights a lamp strip.

l 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 Characteristics（TA=-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 characteristics（TA=-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 time( TH+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:

sk6812 digital white color led smd

sk6812 digital white color led smd

    SK6812 white color smd led is three white colors dimming led,it is consist of amber color with 1800K,warm white color with the cct:3000k to 3200k and white color cct:6000-6500k,with digital ic to control the mixture color the CCT from 1800k to 6500k in one led ,it is almost the white color cct.That is to say when you need the led to light the warm white color so it is warm white , and you need it nature white so it can achieve nature white color...,
With sk6812 inside,you can make it digital control with regular changing color.

How to calculate controller qty for spi signal strips

How to calculate controller qty for spi signal strips

As the stability  improvement of spi signal led strip,

the spi signal strips are widespread use in the holiday decoration lighting and poplar among people.

Such as the APA102 super led strips,and ws2801 digital rgb,and also ws2812b once was popular among people,for the color programmable controlled the color dimming,and lower cost than DMX led strips.

First step to calculate the LED pixels

The ICs for spi signal leds normally have 3 channels,such as apa102,apa102,ws2812b,sk6812,ws2801,ws2811,lpd6803 and so on,they are 3 channels IC.

It means one of these IC can control three color chips,such one R(red),one G(green),one B(blue) total three color dimming,

these three chips combine as tens of thousands of different colors,so in this case one three-channel IC is one pixel,

so the pixel quantity is equal to the IC quantity.

But sometime you may ask when one IC control 3 RGB leds,how to many pixels in this case?

For these 3 leds are controlled by the same IC,the 3 leds is a group, the R(red) channel of the three RGB LEDs in the group are series connection using the same R(red) channel of the IC.

The G(green) and B(blue) is work in the same way,so these 3leds is just one pixels.

Also the one three channels IC control 6leds work the same way as above ,so it is also one IC is one pixel.

But also have some different ICs is not 3channels,such as LPD8806 with 6 channel,and UCS2912/9812 has 12 channels.

but also the control in the same way.when controlling RGB led is three channels combine a pixel,so one LPD8806 IC has two RGB pixels,one UCS2912 IC or UCS9812 IC can control 4 RGB pixels.

But the UCS2912 or UCS9812 addressable rgbw is special circumstances,

for one RGBW SMD LEDs has one R(red),one G(green),one B(blue),one W (white) four color chips,in this is case is 4 channels combine a pxiels,

So one UCS2912 or UCS9812 IC control 3 RGBW pixels,

Second step is choose controller depend the pixel qty.

For T-1000 controller can control 2048 RGB pixel,so it is 2048 three-channel ICs.

But for T-4000,and T-8000,and other ST4K and so on,these controllers have many ports (4 or 8 ports,even other quantity of ports),

And each port control some pixels,such as 1024,or 512 pixels each port.

So in this step you need to have the initial installation plan about the strips,and calculate each port`s controlling pixel qty,then transform into the how many meters each port control.

especial for the led matrix panel display,for the display can not be cut,sometime you just can not depend on the pixel,but you should know the entirety pcs.

Supplementary Condition:

One,for the spi signal led strips,there is limited in the distance from the controller to the first IC of the strips,also the distance between the distance of the before and after the two ICs,

Normally it is better not the cables from controller to the first IC of the strips is not longer than 10m,and the cables from before and after the two ICs is also not further 10 meters too.

If it is further than 10m,we should add the signal enhancers (one type of amplifiers to magnify the distance of signal,

There is one is signal input,and the other is signal output  work together as a pairs.

the signal input on the side of single input, signal output is on the side of  signal come out.

Two,most the full color strips are low voltage direct current such as DC5V,DC12V,DC24V,

So it is better to add extra power to the strips every 5m so as to reduce the voltage drop.

and when the strip with waterproof connectors normally will also demand the the DC connctors so as for the connect to extra power cable.

LED Controller Solution

144led/m apa102 led strip

full color apa104 1.2m led soft board display