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:
Aug. 29, 2023
Filed:
Apr. 12, 2021
Rompower Technology Holdings Llc, Milford, DE (US);
Ionel Jitaru, Tucson, AZ (US);
Abstract
A half bridge switching cell includes two primary switching elements and a transformer with primary and secondary windings. Synchronized rectifiers correspond to the primary switching elements such that each of the synchronized rectifiers conducts when the corresponding primary switching element is not conducting. Each secondary winding is connected to one of the synchronous rectifiers and to a common connection and controlled current source. The primary switching elements conduct during offset times separated by a dead time. A magnetizing current flows through the secondary windings and synchronous rectifiers during the dead time. The magnetizing current flows into the primary winding when each of the synchronous rectifiers is turned off after the dead time, discharging a parasitic capacitance across the one of the primary switching elements when the corresponding synchronous rectifier is turned off, thereby creating a zero voltage switching condition at turn on for the primary switching elements.