Multi-Output Dimming Power Supply with Switchable Output Modes and its Use Method

The present invention provides a multi-output dimming power supply with switchable output modes and its use method, comprising: a dimming signal processing circuit, at least two PWM regulation modules, an electromagnetic filter circuit, a switching power supply main control circuit, a transformer, a rectifier filter circuit, a feedback regulation loop, a single-chip microcomputer control circuit, and a mode-switching circuit connected in sequence; wherein the feedback regulation loop is further connected to the main control circuit, and a signal input of each PWM regulation module is connected to each control terminal of the single-chip microcomputer control circuit. A positive pole of each PWM regulation module is connected to an output of the rectifier filter circuit and a load, respectively, and a negative pole is connected to the load. The present invention is capable of selecting different output modes for different applications, facilitating the achievement of superior dimming effects.