SK6812 Datasheet by Adafruit Industries LLC

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Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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Product Overview
SK6812 is a set of smart control circuit and a light emitting circuit in
one of the controlled LED source. The outer type is the same with a
5050LED chip, each element is a pixel. Pixels contained within the
intelligent digital interface data latch signal shaping amplification circuit,
power supply circuit, a built-in constant current circuit, high precision
RC oscillator, the output is driven by the patented PWM technology,
effectively guarantee the pixels in the color of the light high consistency.
Data protocol using unipolar NRZ communication mode, the pixel is
reset after the end of DIN, accept the data transmitted from the
controller to the 24bit, the first to send data by the first pixel to pixel
extraction, internal data latch, the remaining data after the internal
plastic the processing circuit after shaping amplification through the
DO port output began to turn to the next cascade of pixels, each pixel
through a transmission signal, reduce. Pixel using automatic shaping
forwarding technology, makes the number of cascade without signal
transmission limit of the pixel, only limited signal transmission speed.
The
LED has a low driving voltage, environmental protection and energy
saving, high brightness, scattering angle, good consistency, low power,
long life and so on. The control circuit is integrated in the LED above,
more simple circuit, small volume, easy installation.
Main Application Field:
Full color LED string light, LED full color module, LED super hard
and soft lights, LED guardrail tube, LED appearance / scene lighting
LED point light, LED pixel screen, LED shaped screen, a variety of
electronic products, electrical equipment etc..
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LED COLOR
50 1.47] 3 PCB Solder Pad LED Solder Pad I‘l‘i‘l I ©E 50 L_:u__l
Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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Mechanical Product Size (unit mm):
Top SMD internal integrated high quality external control line serial
cascade constant current IC;
control circuit and the RGB chip in SMD 5050 components, to form a
complete control of pixel, color mixing uniformity and consistency;
built-in data shaping circuit, a pixel signal is received after wave
shaping and output waveform distortion will not guarantee a line;
The built-in power on reset and reset circuit, the power does not work;
gray level adjusting circuit (256 level gray scale adjustable);
red drive special treatment, color balance;
line data transmission;
plastic forward strengthening technology, the transmission distance
between two points over 10M;
data transmission frequency up to 800Kbps, when the refresh rate of 30
frames per second, a cascade of not less than 1024;
built-in powerpolarity protection module, powerpolarity will not damage.
Description:
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VDD 3 7% 1—1 2 DIN ‘1 { J > Kitggj DOUT 4 r—‘ 1—: 1 VSS
Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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Mechanical Size and Pin Map (unit mm):
Pin Function:
Item Symbol Pin Name Function description
1 VSS Ground The signal and power supply and
grounding
2 DIN Data Input control signal input data
3 VDD Power power supply pin
4 DOUT Data
Output control signal output data
The electrical parameters (limit parameters, Ta=25 C, VSS=0V):
Parameter Symbol Range Unit
Input voltage VIN +5 V
Logic input voltage VI-0.5VDD+5.5 V
Working temperature Topt -40~+85
Storage temperature Tstg -50~+150
EST pressure VESD 4K V
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Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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The electrical parameters (such as no special instructions, TA=-
20 ~ +70 ~ 5.5V C, VDD=4.5, VSS=0V):
Parmeter Symbol Min Typic
al Max Unit Test
conditions
The chip supply
voltage VDD --- 5.2 V ---
R/G/B port
pressure
VDS,MA
X--- --- 26 V ---
DOUT drive
capability
IDOH --- 49 --- mA
DOUT conect
ground, the
maximum
drive current
IDOL --- -50 --- mA
DOUT conect
+, the largest
current
The signal input
flip threshold
VIH --- 3.4 ---
VDD=5.0V
VIL --- 1.6 ---
The frequency
of PWM FPWM --- 1.2 --- KHZ ---
Static power
consumption IDD --- 1 --- mA ---
The dynamic parameters (Ta=25 C):
Parameter Symb
ol Min Typic
al Max Unit Test conditions
The speed of
data
transmission
fDIN --- 800 --- KHZ The duty ratio of
67% (data 1)
DOUT
transmission
delay
TPLZ --- --- 500 ns
DINDOUT
TPLZ --- --- 500 ns
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DEN DOUT
Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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RGB chip characteristic parameters:
Color Wavelength(nm) Luminous
intensity(mcd)
Working
voltage(v)
Red 620-625 700-1000 2.0-2.2
Green 522.5-525 1500-2200 3.0-3.3
Blue 467.5-470 700-1000 3.0-3.3
The data transmission time (TH+TL=1.25µs±600ns):
T0H 0 code, high level time 0.3µs ±0.15µs
T1H 1 code, high level time 0.6µs ±0.15µs
T0L 0 code, low level time 0.9µs ±0.15µs
T1L 1 code, low level time 0.6µs ±0.15µs
Trst Reset codelow level time 80µs
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OB , , TOL
Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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The method of data transmission:
Note: the D1 sends data for MCU, D2, D3, D4 for data forwarding
automatic shaping cascade circuit.
The data structure of 24bit:
Note: high starting, in order to send data (G7 - G6 - ...... ..B0)
G7 G6 G5 G4 G3 G2 G1 G0 R7 R6 R5 R4
R3 R2 R1 R0 B7 B6 B5 B4 B3 B2 B1 B0
Timing waveform:
DIN DIN DINDO DO DO
PIX1
D1 D
2
D3 D4
PIX2 PIX3
Connection mode:
Input code:
Data refresh cycle 1 Data refresh cycle 2
first 24bit second
24bit third 24bit first 24bit second
24bit third 24bit
second
24bit third 24bit second
24bit third 24bit
third 24bit third 24bit
D1
D2
D3
D4
reset code
>=50us reset
code
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5V DODT Controller VSS SK6812 SK6812 U1 SK6812
Document No.: SPC / SK6812 Rev. No.: 01
SK6812
Technical Data Sheet
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The typical application circuit:
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