类同IPOD转轮音量控制的触摸IC,主要针对便携式和家用电器应用。它们具有更低的功耗，增强了在苛刻感测条件下工作的能力，并且能很方便地在转轮中心安置一个机械按钮(QT511)，使转轮无须反应无意的触摸。 -IPOD similar touch-wheel volume control IC, the main applications for portable and household appliances. They have lower power consumption, enhan