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:
Oct. 23, 2012
Filed:
Feb. 04, 2010
Emir Serdarevic, Graz, AT;
Emir Serdarevic, Graz, AT;
Austriamicrosystems AG, Unterpremstätten, AT;
Abstract
A DC/DC converter comprises an inductive element (L) having a first terminal connected to an input connection () and a second terminal () coupled to a reference potential connection () by a first switching element (N). A second switching element (P) being a p-channel field-effect transistor couples the second terminal () to an output connection (). A control unit (CTL) comprises a detection unit which is configured to detect a first mode of operation in which an input voltage (VIN) is higher than a desired output voltage (VOUT). The control unit is configured, upon detection of the first mode of operation, during a first phase (PH) to control the first switching element (N) to a closed state and a second switching element (P) to an open state, during a second phase (PH) which comprises a first sub-phase (PHA) and a second sub-phase (PHB), to control the first switching element (N) to an open state, during the first sub-phase (PHA), to control the second switching element (P) to a closed state, and, during the second sub-phase (PHB), to provide a control voltage to a gate terminal of the second switching element (P) which is higher than a difference between an output voltage (VOUT) and a threshold voltage of the second switching element (P).