The IC design of WS28 12 is completely powered on or off. Later, due to the brightness problem, the IC design of WS28 1 1 was completely turned on and off, because if the IC design of 12V was completely turned on and off, the lamp would easily break down.

WS28 1 1 is a special circuit for three-way LED drive control. The chip includes an intelligent digital interface data latch signal shaping and amplifying drive circuit, a high-precision internal oscillator and a 20V high-voltage programmable constant-current output driver.