Interleaved LLC half-bridge series resonant converter having integrated transformer

An interleaved LLC half-bridge series resonant converter having an integrated transformer, comprising:

• a power supply;
• a magnetic core, having a first outer column, a center column and a second outer column;
• a first converter, including:
• a first switch circuit, configured to control a first input voltage and a first input current from the power supply;
• a first resonant tank coupled to the first switch circuit, including a first resonant inductor, a first resonant capacitor and a first magnetizing inductor;
• a first transformer coupled to the first resonant tank, including:
• a first primary winding wound on the first outer column;
• and
• a first secondary winding wound on the second outer column;
• and
• a first rectifier circuit configured to receive and rectify an output voltage and an output current of the first transformer;
• a second converter, including:
• a second switch circuit, configured to control a second input voltage and a second input current from the power supply;
• a second resonant tank coupled to the second switch circuit, including a second resonant inductor, a second resonant capacitor and a second magnetizing inductor;
• a second transformer coupled to the second resonant tank, including:
• a second primary winding wound on the first outer column;
• and
• a second secondary winding wound on the second outer column;
• and
• a second rectifier circuit configured to receive and rectify an output voltage and an output current of the second transformer;
• and
• an output load circuit respectively coupled to the first rectifier circuit and the second rectifier circuit, having an output capacitor and a load,
• wherein a ratio of numbers of coils of the first primary winding to the first secondary winding is determined based on a first gain value of the first resonant tank and a ratio of the first input voltage to an output voltage of the output load circuit, a ratio of numbers of coils of the second primary winding to the second secondary winding is determined based on a second gain value of the second resonant tank and a ratio of the second input voltage to the output voltage of the output load circuit, and the first gain value and the second gain value are approximately 1.