说明：  ET6290 是一颗具有PWM 调制功能的恒流 LED 驱动电路，ET6290 内置9 个独立的低阻彩色LED 驱 动通道，输出电流可以通过对PWM 字节编程来实现256 阶亮度，来组成各种颜色。每个通道在净空电压 为0.35V 时，可以提供约40mA 电流。
(ET6290 is a constant current LED driver circuit with PWM modulation function, ET6290 built-in 9 independent low resistance color LED drive Dynamic channel, the output current through the PWM byte programming to achieve the 256- order brightness, to form a variety of colors. Each channel in the voltage headroom When 0.35V is, it can provide about 40mA current.)