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:
Nov. 12, 2019
Filed:
Mar. 20, 2017
Alpha and Omega Semiconductor (Cayman) Ltd., Grand Cayman, KY;
ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD., Grand Cayman, KY;
Abstract
A controller for driving a power switch incorporates a hard turn-on disable circuit to prevent the power switch from turning on when the power switch is sustaining a high voltage value. The hard turn-on disable circuit includes a hard turn-on detection circuit and a protection logic circuit. The hard turn-on disable circuit is configured to block or to pass the system input signal to the normal gate drive circuit of the power switch depending on the detection indicator signal. In particular, the protection logic circuit blocks the system input signal Vin response to a high voltage detection so that the power switch ignores the system input signal V, which may be erroneous, and the power switch is prevented from undesirable hard switching.