The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2003
Filed:
Apr. 09, 2002
Hubert Raets, Landgraaf, NL;
Carsten Deppe, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a DC—DC converter and a power supply unit formed thereby, with which a DC input voltage (V ) may be converted into two DC output voltages (U Usb) via a resonant switched-mode power supply. Via a circuit stage (M M ), a control circuit (C) generates a first AC voltage (V ), which is converted via two resonant circuits with different transmission behavior and two rectifiers (G Gsb) in frequency-dependent manner into DC output voltages (U1, Usb). To achieve a standby mode, in which the first DC output voltage (U ) is designed to be very low and hardly any power is drawn on the output side, a second, thinner auxiliary circuit stage (M M ) is provided, which is coupled to the resonant circuits via an inductor (L ). The current consumption of the circuit in standby mode may be reduced considerably by appropriate dimensioning.