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, 2013
Filed:
Jul. 28, 2011
Stefan Bäurle, San Jose, CA (US);
Guangchao Darson Zhang, San Jose, CA (US);
Arthur B. Odell, Morgan Hill, CA (US);
Edward Deng, Cupertino, CA (US);
Stefan Bäurle, San Jose, CA (US);
Guangchao Darson Zhang, San Jose, CA (US);
Arthur B. Odell, Morgan Hill, CA (US);
Edward Deng, Cupertino, CA (US);
Power Integrations, Inc., San Jose, CA (US);
Abstract
An example integrated circuit controller includes a pulse width modulation (PWM) circuit and a timing circuit. The PWM circuit controls a switch to regulate an output of a power supply in response to a switch current flowing through the switch and in response to a clock signal having a switching period. The timing circuit provides the clock signal and includes a timing capacitor where the switching period of the clock signal is equal to a charging time that the timing capacitor charges to an upper reference voltage plus a discharging time that the timing capacitor discharges to a lower reference voltage. The timing circuit increases the charging time of the timing capacitor by decreasing a rate at which the timing capacitor is charged to increase the switching period of the clock signal if an on time of the switch is greater than or equal to a threshold time.