An apparatus includes a two-level converter circuit, a higher-level converter circuit (having switches), and a controller. The controller receives a feedback signal associated with the two-level/higher-level converter circuits and generates a control signal based on the feedback signal. The apparatus operates in one of three modes (first/second/third modes) based on the control signal. In the first mode, the apparatus operates as a two-level converter to generate a two-level output voltage from an input voltage. In a second mode, the apparatus operates as a higher-level converter to increase a number of levels to more than two-levels for the output voltage. In a third mode, the apparatus transitions between the first/second modes where the apparatus operates as the two-level converter and where the switches of the higher-level converter circuit are activated for a period of time to generate a zero voltage at a switching connection point of the apparatus.

A power converter includes a plurality of switches, a plurality of resonant capacitors, at least one resonant inductor, a controller, a voltage divider circuit, and plurality of common mode filters. The voltage divider circuit includes a first capacitor and a second capacitor which are connected in series. The plurality of common mode filters are provided one to one for the plurality of switching circuits. The voltage divider circuit has an intermediate potential node between the first capacitor and the second capacitor. Each of the plurality of common mode filters includes a third capacitor connected between the connection node of a corresponding one of the plurality of switching circuits and the intermediate potential node.

A power converter includes a plurality of switches, a plurality of resonant capacitors, at least one resonant inductor, a controller, a voltage divider circuit, and plurality of common mode filters. The voltage divider circuit includes a first capacitor and a second capacitor which are connected in series. The plurality of common mode filters are provided one to one for the plurality of switching circuits. The voltage divider circuit has an intermediate potential node between the first capacitor and the second capacitor. Each of the plurality of common mode filters includes a third capacitor connected between the connection node of a corresponding one of the plurality of switching circuits and the intermediate potential node.