First: the exact tape matters more than the chip name
Suppliers use these IC families in many strip layouts, LED densities, voltages, and pixel groupings. Always verify the product's own datasheet and printed markings. The comparisons below describe common implementations, not a guarantee about every product carrying the name.
WS2812B
WS2812B integrates the RGB LED and control electronics into each pixel package. It is most commonly associated with 5V individually addressable tape. Each RGB pixel consumes three color-data channels.
The advantages are fine pixel granularity and huge ecosystem support. The tradeoff is that 5V systems can draw substantial current and are sensitive to voltage drop, so large projects often need frequent power distribution.
WS2811
WS2811 is an external pixel-driver IC rather than the integrated LED package used by WS2812B. It is commonly found on 12V RGB tape where one IC controls a group of LEDs. For example, a physical group may contain several LEDs but behave as one RGB pixel from the controller's point of view.
That grouping reduces addressable resolution but can make long decorative runs easier to power than a comparable high-current 5V strip.
WS2815
WS2815 is commonly used for 12V individually addressable RGB tape. A notable feature is its dual-signal arrangement: a primary and backup data path are intended to allow data to continue past certain single-pixel/data failures.
The 12V supply reduces feeder current compared with an equivalent-wattage 5V system, but you still need to design power distribution around the actual tape wattage and trace resistance.
Quick comparison
| Family | Common supply | Common addressing | Notable trait |
|---|---|---|---|
| WS2811 | Often 12V | Frequently grouped LEDs per pixel | External driver IC; good for coarser decorative pixels |
| WS2812B | Usually 5V | Usually individual RGB pixels | Very common, simple one-wire data ecosystem |
| WS2815 | Usually 12V | Usually individual RGB pixels | Backup data path in common implementations |
Data and power are separate design problems
A pixel can receive valid data and still misbehave because its supply voltage is too low. Conversely, perfect power distribution will not fix a poor data waveform, missing signal reference, excessive unbuffered data distance, or incompatible logic level.
For large permanent installations, select the pixel controller, power distribution, and tape as a system. Controllers from professional manufacturers often accept Art-Net or sACN and generate the required pixel protocol close to the tape.
Run the numbers for your project
Use the free calculator to estimate connected load, power-supply size, feeder voltage drop, power injection, controller channels, and addressable pixel groups.
Open LED Tape CalculatorRelated guides
Sources & further reading
Planning disclaimer
This guide is for project planning and education. Verify calculations against the exact tape, power supply, controller, conductor, connectors, and manufacturer instructions. Final installation must comply with applicable electrical requirements.