WS2805

WS2805 is 5 output channels specially for LED driver circuit. 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. Also to reduce power ripple, the OUTR, G, B, W1, and W2 channels have delayed on function to reduce the circuit ripple during frame refresh. IC use single NZR communication mode. After the chip power- on reset, the DIN1 port receive data from controller, the first IC collect initial 40bit 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 40bit. 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 40bit data produce different duty ratio signal at OUTR, G,B,W1,W2 ports. All chip synchronous send the received data to each segment when the DIN1 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,G,B,W1,W2 port unchanged. IC sent PWM data that received justly to OUTR,G,B,W1,W2 ports, after receive a low voltage reset signal the time retain over 280μs. SOP10 package is available.

Applications

• LED full color decorative lighting, such as LED string, LED strip, LED module etc.
• Indoor/outdoor LED video or irregular screen.
• Other consumer electronics.
• Other Various LED Lighting Products.

Key features

• OUTR, G, B, W1, W2 port withstand voltage 20V, DIN&DOUT port withstand voltage 24V.
• Built- in voltage- regulator tube, only a resistance needed to add to IC VDD feet when under 24V power supply.
• With built- in resistors, DIN and DOUT ports are over- voltage protected, and a short connection of 24V will not burn out.
• 256 Gray- scale adjustable and 4 kHz scanning frequency.
• 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.
• Cascading port transmission signal by single line.
• Any two point the distance less than five meters' transmission signal without any increase circuit.
• When the refresh rate is 30fps, the cascade number is at least 1024 pixels.
• Send data at speed of 800Kbps.