Power supply conversion circuit and electronic device

A power supply conversion circuit comprising an isolation transformer,

• wherein the isolation transformer comprises at least two primary coils and at least one secondary coil,
• wherein each primary coil of the at least two primary coils is connected to a half-bridge circuit by a first resonant network, and the respective half-bridge circuits corresponding to the at least two primary coils are connected in series between two electrodes of a power supply,
• wherein each respective half-bridge circuit of the half-bridge circuits is connected in parallel to a voltage divider, the voltage divider comprises a first capacitor and a second capacitor that are connected in series, a first terminal of the first resonant network is connected to an intermediate node of the respective half-bridge circuit, and a second terminal of the first resonant network is connected to a connection point between the first capacitor and the second capacitor, and
• wherein the at least one secondary coil is connected to an input terminal of a rectifier circuit, and an output terminal of the rectifier circuit corresponding to the at least one secondary coil is connected in series between two electrodes of an output terminal of the power supply conversion circuit.