Multi-Channel Independent Control Circuit of Lighting Power Supply

A multi-channel independent control circuit of a lighting power supply, including a power supply control circuit, a transformer, a main current rectifier circuit, a feedback circuit, and a main current output circuit, the transformer includes a primary winding and a secondary winding coupled to each other, the main current rectifier circuit, the feedback circuit and the main current output circuit are sequentially connected in parallel across the loop of the secondary winding, and an output end of the feedback circuit is also connected to the power supply control circuit, the multi-channel independent control circuit further includes one or more secondary side units, the secondary side unit includes a secondary side winding, a secondary side rectifier circuit, a secondary side output circuit, a switching circuit, a detector and a logic control circuit, the secondary side winding is couple to the primary winding in the transformer, the secondary side rectifier circuit and the secondary side output circuit are sequentially connected in parallel across the loop of the secondary winding, the detector is disposed in the secondary side output circuit and an output end of the detector is connected to an input end of the switching circuit through the logic control circuit, an output end of the switching circuit is connected to the secondary side output circuit.