Abstract: The application discloses a multi-input DC converter and a PFC circuit. The multi-input DC converter of the application includes n diodes, a transformer, a switching transistor, a rectifier and filter circuit, and a load. The transformer includes a primary winding and a secondary winding, the number of turns of the primary winding is N1, and the primary winding is divided into n sections by leading out n?1 taps in a specific manner; anodes of the n diodes are respectively connected to n input sources in turn, cathodes of the n diodes are respectively connected to a first terminal of the primary winding and n?1 tap terminals in turn, a second terminal of the primary winding is grounded through the switching transistor, and the secondary winding delivers energy to the rectifier and filter circuit and then to the load. The structure is simple, and the cost is low.

Abstract: The application discloses a multi-input DC converter and a PFC circuit. The multi-input DC converter of the application includes n diodes, a transformer, a switching transistor, a rectifier and filter circuit, and a load. The transformer includes a primary winding and a secondary winding, the number of turns of the primary winding is N1, and the primary winding is divided into n sections by leading out n?1 taps in a specific manner; anodes of the n diodes are respectively connected to n input sources in turn, cathodes of the n diodes are respectively connected to a first terminal of the primary winding and n?1 tap terminals in turn, a second terminal of the primary winding is grounded through the switching transistor, and the secondary winding delivers energy to the rectifier and filter circuit and then to the load.