Product Summary

The WS2801 chip is a kind of small remote controller, which is used in the commercial Pixels. It offers 3 channels of 8bit PMW with programmable constant current source. The WS2801 is widely used in LED decorative lighting, indoor/Outdoor LED video or massage display, PWM signal generator, LCD TV back lighting and so on.

Parametrics

WS2801 absolute maximum ratings: (1)Power Supply Voltage: -0.3 to 6V; (2)Input Voltage: -0.3 to VCC+0.3V; (3)Output Voltage: -0.4 to 7V; (4)Output Pin Voltage: -0.3 to 7V; (5)Output Current: Constant Current Drive Mode, 0 to 50 mA; Constant Voltage Drive Mode, 0 to 100 mA; (6)Maximum Power Dissipation: 600mW; (7)Operating Junction Temperature: -40 to + 150℃; (8)Storage Temperature Range: -55 to + 150℃; (9)Lead Temperature (Soldering, 10 seconds): 300℃; (10)ESD susceptibility: 4000 V

Features

WS2801 features: (1)Supports both constant voltage and constant current drive mode; (2)Programmable constant LED drive current; (3)Wide constant output current range 5~150mA; (4)Build in PWM dimming scheme for each output channel, supports free-run, especially suitable for low cost controller application; (5)PWM free-run capability(refresh rate(2.5KHz); (6)Build in buffers to cascading data and clock to the next driver; (7)Output polarity reverse function; (8)Support hot swap; (9)Maximum input clock frequency 25MHz; (10)Power supply voltage 3.3~5.5V.

Diagrams

WS2801 diagram