Patent ID: 8503199

Claim:
An AC/DC power converter comprising: an AC input having first and second terminals and a DC output having first and second terminals; an input rectifier circuit coupled to the AC input, the input rectifier circuit comprising a passive diode first half-bridge rectifier circuit comprising first and second diodes coupled to the second AC input terminal and functional to provide rectification of an AC input voltage signal, a first input current shaper circuit comprising first and second switches coupled in parallel with the first and second diodes and controlled synchronously with the AC input voltage signal, and a first input inductor coupled on a first end between the first AC input terminal and a switch node between the first and second switches in the first input current shaper circuit, a second input current shaper circuit comprising first and second switches coupled in parallel with the first and second switches of the first input shaper circuit and controlled to interleave in operation with respect to the first and second switches of the first input current shaper circuit, and a second input inductor coupled on a first end between the first AC input terminal and the first end of the first input inductor, and on a second end to a switch node between the first and second switches of the second input shaper circuit; the first and second input current shaper circuits are functional in combination to shape an AC input current signal associated with an AC input power signal to a substantially sinusoidal current signal; a bulk capacitor circuit coupled to the input rectifier circuit; a DC/AC converter circuit coupled to the bulk capacitor circuit; a resonant circuit comprising a resonant capacitor and a transformer having a primary side coupled to the DC/AC converter circuit and a secondary side having first and second ends and a center tap coupled to the first DC output terminal; and an output active rectifier switch circuit comprising a first output rectifier switch coupled on a first end to the first end of the secondary side of the transformer, and a second output rectifier switch coupled on a first end to the second end of the secondary side of the transformer, the second ends of the first and second output rectifier switches coupled to the second DC output terminal.