SWITCHING POWER SUPPLY DEVICE

A switching power supply device includes a pair of input terminals, a pair of output terminals, N number (N: an integer of 2 or greater) of transformers, N number of inverter circuits, a rectifying and smoothing circuit, and a driver. The transformers include respective primary-side windings and res...

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Bibliographische Detailangaben
1. Verfasser: CHO, Hisanori
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A switching power supply device includes a pair of input terminals, a pair of output terminals, N number (N: an integer of 2 or greater) of transformers, N number of inverter circuits, a rectifying and smoothing circuit, and a driver. The transformers include respective primary-side windings and respective secondary-side windings. The inverter circuits are disposed in parallel between the pair of input terminals and the primary-side windings and each include switching elements. The rectifying and smoothing circuit is disposed between the pair of output terminals and the secondary-side windings and includes a rectifying circuit and a smoothing circuit. The driver sets an input voltage to be supplied to the smoothing circuit at successive stage levels (N+1) by causing, through switching driving, the inverter circuits to apply a predetermined pulse voltage or a voltage at a predetermined voltage value to the respective primary-side windings.