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:
Jun. 11, 2019
Filed:
Oct. 25, 2017
Infineon Technologies Ag, Neubiberg, DE;
Vratislav Michal, Villach, AT;
Matteo Agostinelli, Villach, AT;
Volha Kharko Subotskaya, Villach, AT;
Infineon Technologies AG, Neubiberg, DE;
Abstract
A circuit to detect body diode conduction in a switch with an adaptive dead-time scheme for a switched mode power supply. The body-diode of a first switch entering conduction means the first switch is OFF and a second switch can be turned ON. The body diode conduction detector circuit (BDCD) uses relative analysis of the switching node voltage (V). The BDCD circuit acts as a voltage follower in a first phase and a comparator in a second phase. The BDCD circuit tracks Vduring the first phase and samples and holds V+V=Vat the end of the first phase. During the second phase, the BDCD circuit compares V+Vto V. When the body-diode of the first switch enters conduction Vwill become negative and V+Vwill drop below V, and toggle the logic level output of the comparator.