CONVERTER AND ON-BOARD CHARGER

This application provides a converter and an on-board charger, to avoid a short-circuit fault of the converter while inhibiting a surge impact. The converter includes: a power factor correction PFC circuit, a surge protection circuit, and a switch circuit. The PFC circuit is configured to: convert a first component of a first alternating current received by an alternating current terminal of the PFC circuit into a first direct current, and output the first direct current through a direct current terminal of the PFC circuit; and convert a second direct current received by the direct current terminal of the PFC circuit into a second alternating current, and output the second alternating current through the alternating current terminal of the PFC circuit.