Multi-phase LLC resonant converter circuit

A multi-phase LLC resonant converter circuit that converts a first DC voltage of a DC power supply into a second DC voltage to output the second DC voltage, the multi-phase LLC resonant converter circuit comprising:

• first to Nth (Nis an integer greater than or equal to 2) LLC resonant converters each including
• a series circuit in which a first switch and a second switch are connected in series, the series circuit being connected in parallel to the DC power supply,
• a high-frequency transformer including a primary-side winding and a secondary-side winding,
• a resonant circuit that includes a resonant reactor and a resonant capacitor, the resonant reactor being connected between a connection point between the first switch and the second switch and one end of the primary-side winding, the resonant capacitor having one end connected to another end of the primary-side winding, and
• a rectifier circuit that rectifies output of the secondary-side winding;
• a neutral line that connects other ends of the resonant capacitors of the first to Nth LLC resonant converters to each other;
• a neutral line reactor that is connected between the neutral line and a power supply line of one of a positive electrode and a negative electrode of the DC power supply;
• and
• an output capacitor that is connected in parallel to an output side of the rectifier circuit of the first to Nth LLC resonant converters to output the second DC voltage to both ends.