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:
Apr. 28, 2020
Filed:
Jul. 18, 2018
Applicant:
Efficient Power Conversion Corporation, El Segundo, CA (US);
Inventors:
David C. Reusch, Blacksburg, VA (US);
Suvankar Biswas, Blacksburg, VA (US);
Michael A. de Rooij, Playa Vista, CA (US);
Assignee:
Efficient Power Conversion Corporation, El Segundo, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/088 (2006.01); H03K 17/06 (2006.01); H02M 3/00 (2006.01); G05F 1/46 (2006.01);
U.S. Cl.
CPC ...
H03K 17/063 (2013.01); H02M 1/088 (2013.01); G05F 1/46 (2013.01); H02M 3/00 (2013.01);
Abstract
A cascaded synchronous bootstrap supply circuit with reduced voltage drop between the cascaded bootstrap capacitors by replacing bootstrap diodes with gallium nitride (GaN) transistors. GaN transistors have a much lower forward voltage drop than diodes, thus providing a cascaded gate driver bootstrap supply circuit with a reduced drop in bootstrap capacitor voltage, which is particularly important as the number of levels increases.