WS2851 Pixel Protocol
Manufacturer: WorldsemiA 12V single-wire, individually addressable RGB pixel chip with an integrated 8-bit-per-channel controller, aimed at static and slow-moving colour work.
Specifications
| Specification | Detail |
|---|---|
| Clock Type | Data-Only |
| Color Resolution | 8 Bits |
| Physical Package | SMD5050 with integrated LEDs |
| RGB | Yes |
| RGBW | No |
| Output Pixel Voltage | 12V |
| PWM Rate | 400Hz |
| Suitable Camera | Flickering may be visible |
| Redundant Data Line | No |
Strengths
- Data-only single-wire control: one data line plus power and ground per run, so no separate clock conductor is routed and there is no high-frequency clock line to radiate EMI.
- 12V operation reduces voltage drop along a run compared with 5V pixels, allowing longer segments between power injection points.
- Familiar SMD5050 package with integrated RGB LEDs and standard 8-bit-per-channel (24-bit) colour, keeping it broadly compatible with common pixel controllers.
Limitations
- The 400Hz PWM rate is low and the row flags the chip as likely to show visible flicker on camera: expect visible flicker on video and broadcast captures, so restrict it to direct-view static or slow-moving effects.
- 8 bits per channel only, no RGBW white channel, and no redundant/backup data line, so a single failed node interrupts every pixel downstream of it.
Overview
The WS2851 is a single-wire, data-only addressable RGB pixel driver in the WS-prefixed pixel family commonly attributed to Worldsemi. Each 12V node houses an integrated controller that latches 24-bit colour (8 bits per channel) and forwards the remaining data down the chain, a self-clocking scheme that needs just one data conductor alongside power and ground. Packaged as an SMD5050 with integrated RGB LEDs, it suits architectural washes, signage and slow effects. Its 400Hz PWM is low, so the row marks it likely to show visible flicker on camera. ENTTEC is not affiliated with Worldsemi.
Mapping an installation? ELM, ENTTEC's free LED pixel mapping software, drives the controllers above over Art-Net and sACN, from a single fixture to building-scale maps.
ENTTEC has been engineering lighting control in Australia since 1999, and shipping LED pixel controllers since the original Pixelator in 2014.