What is WS2801 addressable LED strip light?
WS2801 is a 3-channel (OUTR/OUTG/OUTB) constant current LED driver, each channel can achieve independent 256-level PWM gray control, output up to 200mA constant LED drive current. WS2801 LED chip contains series shift register, data latch, output register, bandgap reference voltage source, internal oscillator and programmable constant current driver.
The serial data input from the SDI data is read into the data shift register inside the chip at the rising edge of the CKI port clock signal, the input clock signal and LED gray scale control signal is shaped by the clock data regeneration circuit inside the chip Output at the CKO and SDO terminals, the input and output signals of each chip realize the normal operation of the entire LED strip.
When the POL port input 0, the polarity is reversed, WS2801 works as a PWM controller, which can drive external switches or circuits to drive high brightness LEDs and achieve 256 levels of grayscale control of high-power LEDs, with fast speed, high reliability, and synchronous refresh of grayscale data, etc. It is suitable for low-cost, cascadable LED decorative lighting systems.