What is ws2811?

WS2811 is a dedicated chip for LED drive control. It adopts return-to-zero code communication protocol, single-line serial cascade interface (DIN, DOUT), built-in high-precision and high-stability oscillator, and data shaping: after accepting the data of this unit, it will automatically Data shaping output, data transmission rate is 800Kbps, it uses a single-line serial cascade interface, and can drive three high-precision constant current LED lights at the same time. It has a built-in high-precision and high-stability oscillator, has the characteristics of synchronous refresh, data shaping, fast data transmission rate, etc., and supports 256 levels of grayscale adjustment. WS2811 adopts the return-to-zero code communication protocol to receive the data from the controller through the DIN end, extract it and send it to the data latch inside the chip. The remaining data is amplified by internal shaping processing and forwarded to the next level through the DO port. chip, so that high-speed data transmission can be achieved. In addition, it also has built-in signal decoding module, data buffer, built-in constant current circuit and patented SPWM technology, which can output high-precision PWM data pulse width control signal. WS2811 is mainly used in indoor LED decorative lighting, architectural LED appearance/scene lighting, wall washers, curtain screens and other fields.

WS2811 has many features, including but not limited to:

Built-in MOSFET with wide voltage input range.

Programmable constant current and brightness control.

Serial input via a DIN interface.

Provides diverse control options, such as sync signal output, RGB color mixing, and built-in slow start function.

The packaging form is DIP-6 or SMD-6.

In addition, SM16703PB sm16703 is also a chip for RGB LED driving. It has a built-in 3-channel constant current driver that can drive red, green, and blue LEDs respectively. Its biggest feature is its low power consumption design and built-in temperature protection function. Effectively protect LED lamp beads from damage due to overheating.

In addition to the features mentioned above, WS2811 has some other features:
Multi-chip cascading possible: Using single-line serial control, only one data line is needed in addition to the two power lines to control all the color LEDs on the entire light strip.
RGB color LED control chip: can drive three LEDs.
Synchronous signal output: can realize synchronous control of multiple WS2811 chips.
RGB color mixing: You can achieve different color mixing effects by controlling the brightness of red, green, and blue LEDs.
Built-in slow start function: It can realize slow start of LED lamp beads and avoid problems such as flickering and jitter.
Wide voltage input range: adapt to different power supply conditions.
Programmable control: Different control effects and animation effects can be achieved through programming.
Temperature protection function: Built-in temperature protection function can effectively protect the LED lamp beads from damage due to overheating.
Various packaging forms: DIP-6 and SMD-6 are available.
These characteristics make WS2811 a very popular LED driver chip, which is widely used in various LED lighting products.