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各位老师好！
我司待开发一款调光台灯，具体要求如下：
输入：5V电源适配器
输出：18V0.27A或12V0.4A
其它要求：触摸三段调光（用单片机处理触摸信号，PWM频率可调）
求推荐一款内置开关管的驱动芯片！
谢谢！
Hi
可以采用TPS61500: http://www.ti.com/product/TPS61500/description
首先你的选型是升压型的转换器，带有PWM调光的芯片，这种需求较少。芯片可选择LM3431和TPS40211两个型号都能满足要求
