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:
Sep. 10, 2024
Filed:
Jan. 17, 2023
Shanghai Hanmai Electronic Technology Co., Ltd, Shanghai, CN;
Xiaohui Wu, Shanghai, CN;
Lilong Wang, Shanghai, CN;
Shanghai Hanmai Electronic Technology Co., Ltd, Shanghai, CN;
Abstract
A zero-crossing state detection device for a converter and a converter device. The converter includes a first type of power switch electrically coupled between an input terminal and a switch node, a second type of power switch electrically coupled between the switch node and a ground terminal, and an inductor electrically coupled between the switch node and an output terminal. The zero-crossing state detection device includes: a zero-crossing state indication circuit, which is configured to generate an indication signal indicating the zero-crossing state of the inductor current flowing through the inductor, based on a voltage at the switch node after the second type of power switch is turned off and before the first type of power switch is turned on, according to first and second driving signals respectively applied to the first type of power switch and the second type of power switch. Efficiently and accurately monitoring the zero-crossing state of the inductor current cycle by cycle in real-time, serving as a basis for switching between different operating modes of light load and heavy load of the converter.