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Patent Searching and Data


Title:
SWITCHING POWER SOURCE
Document Type and Number:
Japanese Patent JPH03261367
Kind Code:
A
Abstract:

PURPOSE: To prevent parasitic resonance without decreasing the conversion efficiency by connecting a diode in parallel to a coil and a capacitor which compose a series resonance circuit.

CONSTITUTION: The cathode of a diode D2 is connected to the connection of a switching FET (Q) and the coil L1 of a resonance circuit and the anode thereof is connected to an input/output common potential line 2. Thereby the stray capacity of the switching FET generated in switching off and the oscillatory voltage of voltage VDS between the drain and source of the FET (Q) caused by the inductance of the coil are clamped for flattening.


Inventors:
HATAMI MASAO
Application Number:
JP5802890A
Publication Date:
November 21, 1991
Filing Date:
March 12, 1990
Export Citation:
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Assignee:
SONY CORP
International Classes:
H02M3/155; (IPC1-7): H02M3/155