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. 28, 2025
Filed:
Oct. 29, 2021
Da Feng Weng, Sunnyvale, CA (US);
Da Feng Weng, Sunnyvale, CA (US);
[object Object];
Abstract
The proposed solution allows a forward DC-DC converter's isolated transformer to resonant reset and the forward DC-DC converter to operate in ZVS condition regardless of whether the output inductor current is in DCM or CCM. To compare with a regular forward DC-DC converter, the output isolated transformer has an extra reset winding Nt in addition to the regular primary and secondary windings Np and Ns. Based on the rule of the magnetic flux remaining unchanged for the forward output isolated transformer, it is the extra reset winding Nt, a resonant capacitor Cr, an additional MOS Qand the related control function block M that allow the forward output isolated transformer to finish resonant reset and the primary main power MOS Qto operate in ZVS. The magnetizing current of the forward output isolated transformer is fully utilized, and regardless of whether the resonant reset circuit is on the primary or the secondary, the magnetizing current can enable the forward output isolated transformer to resonant reset and serve as the main power MOS Qoperation in ZVS.