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帮忙推荐RGB LED 3W调色调光的驱动方案。

现在的需求是:

输入电压:DC12V

负载RGB led  3W

通过I2C接口来分别调整LED三种颜色的亮度,达到产生任意颜色任意亮度光的目的。用来用作各种颜色的报警指示用。

要求体积小,效率尽可能的高。

请熟悉的朋友帮忙推荐一个方案。目前采用的芯片是PCA9633。