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. 22, 2010
Filed:
Sep. 02, 2008
Hsiang Lin Huang, Hsinchu, TW;
Kent Huang, Hsinchu, TW;
Mao Chuan Chien, Hsinchu, TW;
Shun Hau Kao, Hsinchu, TW;
Hsiang Lin Huang, Hsinchu, TW;
Kent Huang, Hsinchu, TW;
Mao Chuan Chien, Hsinchu, TW;
Shun Hau Kao, Hsinchu, TW;
Advanced Analog Technology, Inc., Hsinchu, TW;
Abstract
A PWM controller for controlling a switching voltage regulator comprises a first comparator, a second comparator and a third comparator. The first comparator is configured to detect voltages of a first node and a second node so as to determine whether to stop the PWM controller. The PWM controller is stopped if a first potential is lower than a threshold, and the first potential derives from the voltage of the first node by a level shift of a first voltage difference. The second comparator is configured to detect the voltage of the first node and then to compare the voltage with a power reference voltage so as to determine whether the PWM controller receives necessary power. The third comparator is configured to compare the voltage of the second node with an enable reference voltage so as to determine whether to disable the PWN controller.