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:
Mar. 14, 2023
Filed:
Jan. 14, 2022
Cypress Semiconductor Corporation, San Jose, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A secondary side controller of a flyback AC-DC converter includes an integrated circuit, which includes: an analog-to-digital converter (ADC) coupled to a voltage bus (VBUS), the ADC to output a digital value corresponding to a voltage level of the VBUS; first logic configured to generate a reference voltage based on the digital value; second logic configured to generate a VBUS gain value based on output power of a flyback transformer of the flyback AC-DC converter; an integrator to accumulate current corresponding to a sensed voltage at a drain of a synchronous rectifier (SR) of a secondary side of the flyback transformer, the accumulated current to be modified according to the VBUS gain value, wherein the integrator outputs an updated sensed voltage; and a comparator to output a detection signal, indicative of a negative sense voltage, in response to the updated sensed voltage matching the reference voltage.