SWITCHING POWER-SUPPLY DEVICE

SWITCHING POWER-SUPPLY DEVICE

A half-bridge converter circuit generates an output voltage from an input voltage, by switching first and second FETs. A subsequent-stage switching control circuit alternately subjects the first and second FETs in the half-bridge converter circuit to on/off control with a fixed on-duty ratio and wit...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: SHIJI HAJIME
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Beschreibung
Zusammenfassung:A half-bridge converter circuit generates an output voltage from an input voltage, by switching first and second FETs. A subsequent-stage switching control circuit alternately subjects the first and second FETs in the half-bridge converter circuit to on/off control with a fixed on-duty ratio and with a switching frequency corresponding to the weight of a load and a dead time sandwiched therebetween. A boost converter circuit includes an inductor, a smoothing capacitor, and a third FET switching the energization of the inductor. A previous-stage switching control circuit subjects the third FET in the boost converter circuit to on/off control with a controlled on-duty ratio, and adjusts the output voltage of the half-bridge converter circuit.