S4523RB is a scheme dedicated to switchable color temperature of dual-drive, four-drive and other multi-drive (even-number drive) power supplies. According to the action of the input switch, it controls the start and shutdown of the driving power supply connected to pins L1 and L2. The chip integrates high-voltage JFET power supply and high-voltage resistor detection network, reducing the cost of the scheme. S4523RB adopts mature AC signal switch detection technology, which can effectively solve the problems encountered in multi-channel switchable color temperature driving power supply schemes, such as inconsistent logic when multiple power supplies are applied simultaneously or abnormal logic state when there is induced leakage on the LED aluminum substrate.