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. 16, 2025
Filed:
May. 23, 2023
Cypress Semiconductor Corporation, San Jose, CA (US);
Qiong Zou, Singapore, SG;
Soon Hwei Tan, Singapore, SG;
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
Systems and methods are provided to supply a voltage (Vcc) to a primary IC in a switch-mode-power-supply following startup. Briefly, an input voltage (V) coupled through a boost-inductor to a switch-pin of the IC is sensed by isolating a DC component (V) of the voltage and checking if Vis greater than a minimum V(V) by comparing Vto a starting reference voltage (V) in the IC. If Vis greater than V, a boost-switch in the IC through which the switch-pin is coupled to ground is cycled on and off to alternately store and discharge energy in the boost-inductor, boosting Vcc. Thereafter, Vis checked against a maximum input voltage by comparing Vto a reference voltage (V), greater than V, and if Vis greater than V, boost is turned off by turning off and ceasing to cycle the boost-switch, protecting the boost-inductor from current runaway.