Chip built-in voltage regulator tube, 24V below the power supply only need to string resistance to the IC
VDD pin, no additional pressure regulator.
Gray adjustment circuit (256 level gray adjustable).
Built-in signal shaping circuit, any - IC received signal after passing.
Other LED lighting products.
Waveform shaping and output again, to ensure that the line waveform distortion does not accumulate.
Built-in power-on reset and power-off reset circuits.
The PWM control end can realize 256 level tuning and sweep frequency rate
2.5 khz。
Serial interface cascade port, which can complete data through the root signal line
Receiving and decoding.
Any two point transmission distance of more than 20 meters without adding any
The circuit.
The data transmission speed can reach 400Kbps and 800Kbps two modules
Main application field
LED full color light character string, LED full color module.
LED full color soft light strip hard light strip, LED guardrail tube.
LED point light source, LED pixel screen, LED shaped screen.
All kinds of electronic products, electrical equipment running lights.
product overview
WS2811 is a three-channel LED drive control circuit, the chip contains intelligent digital interface data latch signal shaping and amplifying drive circuit,
Also included are high precision internal oscillators and 15V high voltage programmable fixed current output drivers. At the same time, in order to reduce the power ripple, 3 channels have - fixed
The delay conduction function is used to reduce circuit ripple when the frame is refreshed.
The chip adopts the communication mode of single line return to zero code. After the chip is powered on and reset, the DIN end accepts the data transmitted from the controller and sends it first
The 24bit data is enriched by the fourth chip and sent to the data latch inside the chip, and the remaining data is enlarged by the internal shaping processing circuit
The DO port starts to forward the output to the next cascaded chip, and the signal is reduced by 24 bits for each chip transmission. The chip adopts automatic shaping
Forwarding technology, so that the number of cascades of the chip is not limited by signal transmission, only limited signal transmission speed requirements.
The data latch inside the chip generates different duty cycle control signals in the OUTR, OUTG and OUTB control terminals according to the received 24bit data. When the DIN terminal inputs the RESET signal, all the chips synchronously send the received data to each segment, and the chip will reconnect after the signal ends
After receiving the new data, after receiving the initial 24-bit data, the chip forwards the data through the DO port. Before receiving the RESET code, the chip OUTR,
The original output of OUTG and OUTB pins remains unchanged. When the low level RESET code is received above 50μs, the chip will just receive the 24bit PWM
Data pulse width is output to OUTR, OUTG, OUTB pins. Available in SOP8 and DIP8 packages.