The S4422B series of chips are dedicated chips for switchable color temperature adjustment. They have two built-in 40V MOSFETs, simplifying the peripheral circuit structure. This series of chips uses mature current detection technology to determine the on/off state, ensuring state consistency when multiple power supplies are applied simultaneously. The S4422B series can be used in isolated flyback or buck structures, and can also be used with capacitive-resistive power supplies to achieve switchable color temperature adjustment, which is convenient to use.