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:
Dec. 19, 2023
Filed:
Dec. 12, 2022
Applicant:
Huawei Digital Power Technologies Co., Ltd., Shenzhen, CN;
Inventors:
Assignee:
Huawei Digital Power Technologies Co., Ltd., Shenzhen, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02M 1/40 (2007.01); H02M 1/08 (2006.01); H02M 3/00 (2006.01);
U.S. Cl.
CPC ...
H02M 1/40 (2013.01); H02M 1/08 (2013.01); H02M 3/33569 (2013.01); H02M 3/33592 (2013.01); H02M 3/00 (2013.01); H02M 3/33573 (2021.05);
Abstract
An apparatus includes a controller configured to generate a PWM signal for controlling a power switch of a forward converter, a bias switch and a bias capacitor connected in series and coupled to a bias winding of the forward converter, and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the bias winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.