A resonant converter includes a resonant transformer having a leakage inductance and a magnetizing inductance coupled in series to form a resonant transformer input port. The resonant transformer has an output that is coupled to provide an output power to a load. A primary bridge circuit is coupled to provide an input power to the resonant transformer input port. A buffer circuit is coupled in parallel with the resonant transformer input port. A control module is coupled to receive a buffered primary port signal from the buffer circuit to control the primary bridge circuit to control the output power to the load in response to the buffered primary port signal.