This pixel protocol was designed by World Semi in China. WS2815B offers all the same features as WS2815, but with slightly different timing, and at a constant current of 12mA, instead of 15mA. This means that this protocol is more suited to low-intensity applications. It 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, making it one of the most common protocols for pixel lighting displays. The control circuit and LEDs are integrated in a 5050 SMD package, which provides a small physical footprint for each pixel.
|SMD5050 with integrated LEDs|
Output Pixel Voltage
|Up to 67fps|
Data Transfer Rate
Redundant Data Line
620 – 630 nm
510 – 520 nm
465 – 475 nm
Considerations for Use
- 12V operation, allows for long cable lengths and long chains of pixels
- High PWM rate allows for filming these pixels with cameras up to 67fps
- Redundant data line reduces chance of entire strip failure
- Data-only restricts refresh rates to be limited by the speed of the protocol, which can be slow
- Only 8 bits of data for each color makes dimming curves less smooth
WS2815 and WS2815B have been known to induce defects during manufacturing which cause the pixels to display erratic behavior for a brief moment after power up. If this is a concern, then SK6813 could be considered as an alternative. 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.
Are you looking for WS2815B pixel drivers that work with Art-Net or sACN?