SWITCHING POWER SUPPLY CIRCUIT

PROBLEM TO BE SOLVED: To provide a switching power supply circuit which can stably operate a protection circuit. SOLUTION: The switching power supply circuit comprises a diode DP in which an anode is connected to a connecting node of a diode D5 and a capacitor C8, and a cathode is connected to a con...

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Bibliographic Details
Main Author NAKAO NOBORU
Format Patent
LanguageEnglish
Published 14.08.2008
Subjects
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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Summary:PROBLEM TO BE SOLVED: To provide a switching power supply circuit which can stably operate a protection circuit. SOLUTION: The switching power supply circuit comprises a diode DP in which an anode is connected to a connecting node of a diode D5 and a capacitor C8, and a cathode is connected to a connecting node of a diode D4 and a capacitor C7. By such a configuration, a terminal C side can be short-circuited via the diode DP even if, for example, a terminal B side is short-circuited due to the breakage of the capacitor C7. Transistors Q3 to Q5 can surely be turned off accordingly, and the protection circuit 4 can surely be operated. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20070016506