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. 09, 2024
Filed:
Dec. 09, 2021
Applicant:
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Inventors:
Assignee:
MagnaChip Semiconductor, Ltd., Cheongju-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/156 (2006.01); H02M 1/00 (2006.01); H02M 3/158 (2006.01); H05B 45/375 (2020.01);
U.S. Cl.
CPC ...
H02M 3/156 (2013.01); H02M 1/0009 (2021.05); H02M 1/0058 (2021.05); H02M 3/158 (2013.01); H05B 45/375 (2020.01);
Abstract
A switch control circuit and a switch control method are provided. In this circuit, compositions that sense a drain voltage of a switch device are added in a QR Buck Converter switch control circuit. A first resistor, a second switch, a second resistor are electrically connected to a drain terminal of a switch device to sense the 0 A state of an inductor current. On the basis of a detection result, the switch control circuit turns on the switch device when an inductor current is 0 A, and a drain sensing voltage (ZCD) is less than a predetermined reference voltage (REF).