Pixel Protocol Overview: UCS7804

This protocol was designed by Lianxinke in China. UCS7804 allows connection of either one RGB or one RGBW LED per chip, and selection between RGB/RGBW is made available through digital configuration. It receives 8-bit data, but upscales this to a gamma-corrected 16-bit curve, giving the ability for high resolution, with fewer DMX channels required. There is also a built-in gray level smoothing function built-in to the protocol, allowing for even smoother looking dimming curves. The control circuit comes in a SOP8 package, allowing for more flexibility with LED choice.

PixLite Support

Are you looking for UCS7804 pixel drivers that work with Art-Net or sACN? All PixLite Mk3 products support UCS7804 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.

Current Control

UCS7804 has the ability to digitally control the current of the connected LEDs. Use the 6-bit current control per color to lower the brightness without sacrificing resolution, and tune the current of individual colors, allowing for more accurate color mixing. This individual current control can be set when configuring your PixLite Mk3 controller

Technical Specifications

Clock Type Data-Only
Color Resolution 8 bits with 16-bit built-in gamma correction
Physical Package SOP8
Output Pixel Voltage 5 – 30V
PWM Rate 16,000Hz
Suitable Camera Up to 533fps, see Refresh Rate and PWM Rate
Data Transfer Rate 660 kbps
Redundant Data Line No

UCS7804 Advantages

  • Very high PWM rate allows for filming these pixels with cameras up to 533fps
  • Up to 30V, allowing for very long cable lengths
  • 16-bit built-in gamma correction and built-in smoothing factor makes dimming curves more smooth
  • Option for white LED allows for higher brightness and more color mixing options

UCS7804 Disadvantages

  • Data-only restricts refresh rates to be limited by the speed of the protocol, which will generally be slow
Categories: Pixel LEDs