POWER SUPPLY CIRCUIT

PROBLEM TO BE SOLVED: To solve the problem that a rush current is generated at the start of operation of a power supply circuit, so that instantaneous voltage drop of power supply, EMI or heat generation may occur, thereby adversely affecting other apparatuses. SOLUTION: In the power supply circuit...

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Bibliographische Detailangaben
1. Verfasser:	KUSHIMA TAKAHITO
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:	PROBLEM TO BE SOLVED: To solve the problem that a rush current is generated at the start of operation of a power supply circuit, so that instantaneous voltage drop of power supply, EMI or heat generation may occur, thereby adversely affecting other apparatuses. SOLUTION: In the power supply circuit which charges a flying capacitor C1 to an input voltage V1 through switching elements Q1-Q4 and performs a charge pump operation by further applying the input voltage V1 to the charging voltage of the flying capacitor C1, a reference power supply 20 generating the input voltage V1 consists of a variable output voltage power supply, and a timing control circuit 30 changes the voltage of the reference power supply 20 in time series, thus reducing a rush current at the start of operation of the power supply circuit. COPYRIGHT: (C)2010,JPO&INPIT