Self-oscillating resonant power converter

A resonant power converter comprising:

• an input terminal for receipt of an input voltage;
• a switching network comprising a first semiconductor switch controlled by a control input;
• the switching network comprising a switch input operatively coupled to the input terminal for receipt of the input voltage and a switch output operatively coupled to an input of a resonant network of the resonant power converter;
• the resonant network comprising a predetermined resonance frequency (fR) and an output operatively coupled to a converter output terminal;
• a self-oscillating feedback loop coupled from the switch output to a control input of the switching network to set a switching frequency of the power converter, the self-oscillating feedback loop further comprising:
• a first intrinsic switch capacitance coupled between the switch output and the control input of the switching network;
• a first bias voltage source configured to generate a first adjustable bias voltage;
• a first inductor with substantially fixed inductance coupled in-between the first bias voltage source and the control input of the switching network;
• and
• a voltage regulation loop configured to control an output voltage of the power
• converter by controlling the first adjustable bias voltage applied to the first inductor, wherein the first semiconductor switch is coupled between the switch output and a voltage supply rail of the resonant power converter and a control terminal of the first semiconductor switch is coupled to the control input of the switching network;
• and
• a second semiconductor switch coupled between the switch output and the input terminal;
• wherein a control terminal of the second semiconductor switch is coupled to a second bias voltage source through a cascade of a second inductor with substantially fixed inductance and a third inductor with substantially fixed inductance, and
• wherein a feedback capacitor is coupled between the switch output and an intermediate node between the second and third inductors.