Combined current sense and capacitor voltage sense for control of a resonant converter

A power converter, comprising:

• a resonant converter including:
• a resonant capacitor;
• and
• a current measurement circuit configured to measure current in the resonant capacitor;
• a converter controller configured to control the resonant converter including:
• an integrator configured to receive a current measurement signal from the current measurement circuit and to produce a capacitor voltage signal indicative of the voltage at the resonant capacitor;
• a control logic configured to produce a high side driver signal, a low side driver signal, a symmetry error signal based upon the capacitor voltage signal and the current measurement signal;
• and
• a symmetry controller configured to produce a symmetry correction signal based upon the symmetry error signal, wherein the symmetry error signal is input into the integrator to control the duty cycle of the high side driver signal and the low side driver signal,
• wherein the high side driver signal and the low side driver signal control the operation of the resonant converter.