high quanlity 32led 32IC ws2801 full color rgb led strip

The WS2801 is a constant current LED driver, it is primarily designed for indoor / outdoor LED display, and decorative LED lighting system, ideal for LED lighting system used to relay connected in series, the WS2801 has three separate output driver channels, Each channel can achieve independence 256 PWM grayscale control, can not change the LED light color under the conditions of 256 LED grayscale control and can output up to 200mA of constant LED drive current, the WS2801 internal contains tandem shift register, data latches, the output register, the bandgap reference voltage source, the internal oscillator and programmable constant current drive.

Serial data from the SDI data input clock signal's rising edge of CKI mouth was read into the chip internal data shift register, the input clock signal and LED grayscale control signals inside the chip clock and data regeneration circuit shaping in CKO and SDO-ended output, so that the chip can relay connected in series work. When the POL = "0", the output polarity reversal, the WS2801 as a PWM controller that can drive an external switch or circuit to drive high-brightness LED, high power LED 256 gray scale control. Alchip Microelectronics WS2801 2 - wire transmission control method specifically for LED decorative lighting systems can be cascaded design, with fast speed, high reliability, and grayscale data synchronization refresh and reduce system costs, to maximize the well suited for low-cost LED decorative lighting systems.

Work function description

The WS2801 internal contains the serial shift register, data latches, the output register, the bandgap reference voltage source, the internal oscillator and programmable constant current drive. WS2801 sampling the serial data input SDI data at the rising edge of input clock signal, and store it to its internal shift register. When the WS2801 is not detected in consecutive 1ms clock CKI signal the existence of the WS2801 will latch previously sampled gray-scale data to the data latch and at the same time to refresh the internal status register in preparation for the next data transfer. WS2801 internal programmable constant current drive to the constant current and constant voltage mode drive an external LED string, through the expansion of the peripheral circuit, these drives high input voltage, constant voltage or current mode drive LED strings.

The auto-clock data alignment circuit to automatically align the internal data and clock, the internal push-pull output stage has a strong drive capability to meet the needs of its cascading applications.