WS2814A

WS2814A is a 4-channel LED control driver chip. Its internal includes intelligent digital port data latch and signal reshaping amplification drive circuit. Also include a precision internal oscillator and a 20V voltage programmable constant current output drive. WS2814A adopts single NZR communication mode. After the chip power-on reset, the DIN port receive data from controller, the first IC collect initial 32bit data then sent to the internal data latch, the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade IC through the DO port. After transmission for each chip, the signal to reduce 32bit. IC adopt auto reshaping transmit technology, making the chip cascade number is not limited the signal transmission, only depend on the speed of signal transmission. The data latch of IC depend on the received 24bit data produce different duty ratio signal at OUTR, OUTG, OUTB port. All chip synchronous send the received data to each segment when the DIN port input a reset signal. It will receive new data again After the reset signal finished. Before a new reset signal received, the control signal of OUTR, OUTG, OUTB port unchanged. IC sent PWM data that received justl to OUTR, OUTG, OUTB port, after receive a low voltage reset signal the time retain over 280ps There are SOP8 and FSOP8 packages available.

Applications

• LED full color decorative lighting, such as LED string, LED strip, LED module etc.
• Indoor/outdoor LED video or irregular screen, LED pixel lights and other kinds of LED lighting products.

Key features

• OUTR, G, B, W port withstand voltage 20V, DIN port withstand voltage 9V.
• Built-in voltage-regulator, only a resistor needed to add to VDD PIN when under 24V power supply.
• Built-in signal reshaping circuit, to ensure waveform distortion do not accumulate after wave reshaping to the next driver.
• Built-in electrify reset circuit and power-down reset circuit.
• 256 Gray-scale adjustable and scan frequency is 2KHz.
• Cascading port transmission signal by single line.
• Any two point the distance less than 2 meters transmission signal without any additional circuit.
• Good color consistency and cost effective.
• When the refresh rate is 30fps, the cascade number is at least 1024 pixels.
• Send data at speed of 800Kbps.