Boosted-Output Inverter for Electronic Devices

A power converter comprising:

• an output capacitor coupled to ground;
• a half-bridge comprising:
• a high-side switch coupled to ground via the output capacitor;
• a low-side switch coupled to ground directly;
• and
• a central node between a source of the high-side switch and a drain of the low-side switch;
• a boost inductor coupled to the central node;
• a resonant circuit coupled to the central node;
• and
• a controller coupled to the half-bridge and configured to drive the high-side switch and low-side switch at substantially opposite duty cycles and at a resonant frequency of the resonant circuit.

A method of converting low-voltage direct current to a higher-voltage alternating current, the method comprising:

• at a selectable duty cycle:
• enabling a low-side MOSFET of a power converter to connect a primary tank inductor to ground;
• and
• disabling the low-side MOSFET and enabling a high-side MOSFET to connect an output of the primary tank inductor in series with a secondary tank inductor and parallel to an output capacitor;
• and
• adjusting the selectable duty cycle to change current through the secondary tank inductor.