Worldsemi WS2816A-2121-V2-B

Huacaiwei's next-generation digital LED is developed for high-definition image applications, with up to 16-bit grayscale data per channel. The port refresh rate reaches up to 10kHz, making it ideal for large-display image rendering. Each channel features 32-level current gain. The highly integrated digital LED requires no external electronic components, including capacitors. The data protocol employs single-wire return-to-zero (RZ) communication. After power-on reset, the DIN port receives data transmitted from the controller. The first 48 bits of incoming data are extracted by the first pixel and latched into its internal data register; the remaining data is reshaped and amplified by the internal signal conditioning circuit, then forwarded through the DO port to the next cascaded pixel. Each pixel in the chain reduces the signal by 48 bits as it passes through. The pixels utilize automatic signal reshaping and forwarding technology, so the number of cascadable pixels is not limited by signal transmission integrity — only by signal transmission speed requirements.

• IC control circuit and LED point light source share a single power supply.
• Control circuit and RGB die integrated in a 2121 package, forming a complete externally-controlled pixel.
• Built-in signal reshaping circuit; each pixel reshapes the waveform before output upon signal reception, preventing waveform distortion accumulation along the line.
• Built-in power-on reset and power-down reset circuits.
• OUT R/G/B output grayscale levels: 65536.
• Port scan frequency: 10kHz.
• 32-level current gain per channel.
• Serial cascade interface; data reception and decoding via a single signal line.
• Ultra-compact 2.1×2.1×1mm (height) form factor.

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