OBC AND DC/DC CIRCUIT, OBC, NEW ENERGY AUTOMOBILE, AND CHARGING PILE

摘要

An on-board charger (OBC) and DC/DC circuit, wherein same is applied in the field of on-board chargers. A second secondary circuit (1023) in the OBC and DC/DC circuit comprises: a first switch tube (SR21) and a second switch tube (SR11), wherein a first end of a first secondary winding (L4) is coupled to a first electrode of the first switch tube (SR21); a second end of the first secondary winding (L4) is respectively coupled to a first direct-current end (P1) and a first end of a second secondary winding (L3); a second electrode of the first switch tube (SR21) is coupled to a second direct-current end (P2); an anode of a body diode of the first switch tube (SR21) is coupled to the second direct-current end (P2); a second end of the second secondary winding (L3) is coupled to a first electrode of the second switch tube (SR11); a second electrode of the second switch tube (SR11) is coupled to the second direct-current end (P2); and an anode of a body diode of the second switch tube (SR11) is coupled to the second direct-current end (P2). The structure of the second secondary circuit (1023) is simple, thereby helping to simplify the structure of an OBC circuit in an OBC.