Worldsemi WS2813B-B

WS2813B-B is an intelligent externally-controlled LED light source with integrated control circuitry and light-emitting circuitry. It shares the same form factor as a 5050 LED, with each component functioning as a single pixel. Each pixel integrates an intelligent digital interface with data latch, signal reshaping/amplification drive circuit, reverse polarity protection circuit, high-precision internal oscillator, and high-precision constant current control module, ensuring highly consistent color output across pixels. The product supports dual-line signal transmission, so a single damaged pixel does not affect the overall color display. The data protocol uses single-wire return-to-zero (RZ) communication. After power-on reset, the DIN port receives data from the controller — the first pixel extracts and latches the initial 24 bits, while the remaining data is reshaped and amplified internally before being forwarded to the next cascaded pixel via the DO port; each pixel reduces the signal by 24 bits. Pixels employ automatic reshaping and forwarding technology, so the number of cascadable pixels is not limited by signal transmission constraints, only by signal transmission speed requirements. The port scan frequency reaches up to 2KHz with no flicker under high-definition camera capture, making it ideal for high-speed moving applications. The RESET time is greater than 280μs, so interruptions will not cause false resets, enabling support for lower-frequency, more cost-effective MCUs.

• All components integrated in a 5050 package, forming a complete externally controlled pixel without any peripheral components.
• Intelligent reverse polarity protection — no component damage when 5V supply is connected in reverse.
• Built-in signal reshaping circuit; each pixel reshapes the received waveform before forwarding, preventing waveform distortion accumulation along the line.
• Each pixel supports 256 brightness levels per primary color, enabling full true-color display with 16,777,216 colors.
• Port scan frequency: 2KHz.
• Serial cascade interface — data reception and decoding via a single signal line.
• Breakpoint resume transmission supported; an additional signal line enables dual-signal transmission, so a single damaged pixel does not affect the overall display.
• No additional circuitry required when transmission distance between any two points does not exceed 2 meters.
• Cascade count no less than 1024 pixels at a refresh rate of 30 frames/second.
• Data transmission speed up to 800Kbps.
• Large-die emitter chip with ultra-high brightness, highly consistent color, and excellent cost performance.
• No external electronic components required, including capacitors.
• Black housing bracket.

• Consumer Electronics
• LED Lighting & Illumination
• Computers & Peripherals
• Gaming Devices
• Various Electrical Appliances