System and method of controlling a power converter having an LC tank coupled between a switching network and a transformer winding

A converter comprising a controller configured to:

• charge an LC tank coupled between a switching network and a primary winding of a transformer for a first period of time by connecting the LC tank to one or more input capacitors by controlling transistors of the switching network, wherein the switching network comprises a first half-bridge coupled between a first supply terminal and a center node, and a second half-bridge coupled between the center node and a second supply terminal, and wherein a portion of the first half-bridge and a portion of the second half-bridge are configured to provide a current recirculation mode with the LC tank;
• prevent energy transfer from the primary winding of the transformer to a secondary winding of the transformer during the charging the LC tank by controlling a first transistor in series with the secondary winding of the transformer;
• and
• after charging the LC tank, discharge the LC tank for a second period of time to transfer a first energy to the secondary winding of the transformer by
• disconnecting a terminal of the LC tank from the one or more input capacitors by turning off two transistors of the switching network.