Pixel Protocol Overview: SK6813

This pixel protocol was designed by OPSCO in China. SK6813 comes in two variants - 5V or 12V. The 12V variant (also called SK6813HV for 'high voltage') is very similar to World Semi's WS2815. SK6813HV uses 12V as its main power input for each chip, VDD, which is then dropped down to 5V inside each pixel for its logic requirements. This allows longer chains of pixels to driven in series, reducing the need for power injection. The control circuit and LEDs are integrated in a 5050 SMD package, which provides a small physical footprint for each pixel.

PixLite Support

Are you looking for SK6813 pixel drivers that work with Art-Net or sACN? All PixLite Mk2 and Mk3 products support SK6813 as an available Pixel IC type, so get in touch with us to find out how the lighting specialists at Advatek can support you in your pixel lighting project.

Check out Advatek's new SK6813 Blaze Series of LED Fixtures here

Technical Specifications

Clock Type Data-Only
Color Resolution 8 bits
Physical Package SMD5050 with integrated LEDs
RGBW See SK6818
Output Pixel Voltage SK6813: 5V
SK6813HV: 12V
Input Voltage SK6813: 5V
SK6813HV: 12V
PWM Rate 1200 Hz
Suitable Camera Up to 40fps, see Refresh Rate and PWM Rate
Data Transfer Rate 800kbps
Redundant Data Line Yes

Color Specifications

Color Brightness Wavelength
Red 300 – 500 mcd 620 – 630 nm
Green 1000 – 1500 mcd 515 – 530 nm
Blue 200 – 400 mcd 460 – 475 nm

SK6813 Advantages

  • For SK6813HV: 12V operation allows for long cable lengths and long chains of pixels
  • High PWM rate allows for filming these pixels with cameras up to 40fps
  • Redundant data line reduces chance of entire strip failure

SK6813 Disadvantages

  • Data-only restricts refresh rates to be limited by the speed of the protocol, which will generally be slow
  • Only 8 bits of data for each color makes dimming curves less smooth

Operational Behavior

WS2815 has been known to induce defects during manufacturing which cause the pixels to display erratic behavior for a brief moment after power up. While many of the features of SK6813 are adopted from WS2815, the design of SK6813 reduces the chance of these same defects during manufacturing. This design sets it apart, making it a more reliable and stable choice.

Categories: Pixel LEDs