Artesyn Technologies, Inc.

Frank Keane

Karl Rinne

Brian Gaynor

Sean Spelman

Joseph Duigan

Joe Duigan

A transformer (1) for a printed circuit board (2) is provided with physically separate flat metal windings (6) which are chosen to take the highest or the two highest currents handled by the transformer (1). The lower currents which will often include the power input to the primary are printed on the surfaces (3,4) of the printed circuit board (2). The flat metal windings (5) may be pre-assembled with the core halves (6,7).

Transformer assembly

A converter comprises a first switch (102) for connecting an input DC voltage to a primary winding (103) of a transformer (104), a second switch (105) for connecting a reset voltage to the transformer, and first and second synchronous rectifiers (109, 110) within a filter circuit (108) for receiving an output voltage waveform from a secondary winding (107) of the transformer and generating therefrom a DC output voltage. The synchronous rectifiers are controlled by the secondary winding. A first one of the synchronous rectifiers (109) couples the secondary winding to an output terminal of the power supply to provide output power during part of the switching cycle. The second synchronous rectifier (110) serves as a 'flywheel' for providing load current during a second part of the switching cycle when the first synchronous rectifier is off. The timing of the first and second switches is arranged to prevent simultaneous conduction of the synchronous rectifiers.

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Dungarvan, Ireland

Frank Keane