Patent ID: 8462527

Claim:
A method of converting power from an AC source at a source voltage for delivery to a load at a DC load voltage, where the source voltage may vary between a high line voltage and a low line voltage in a normal operating range, comprising: providing DC-DC voltage transformation and isolation in a first power conversion stage, the first stage having a CA input for receiving power from the source and a CA output for delivering a galvanically isolated unregulated AC adapter module (UAAM) voltage, wherein the providing DC-DC voltage transformation and isolation further comprises providing an integrated adaptive converter array having a first input cell and a second input cell, each input cell having a respective number, Px, of turns, an output cell having a respective number, Sx, of turns, magnetic coupling between the turns to form a transformer common to the first and second input cells and the output cell; configuring the input cells in a parallel connection for operation at the low line voltage and in a series connection for operation at the high line voltage; and providing first stage circuitry for performing the first power conversion stage in a self-contained adapter module having input terminals for connection to the AC source and an output connected to the CA output for providing power to a second power conversion stage wherein the second power conversion stage is external to the adapter module.