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:
Aug. 22, 2017
Filed:
Jun. 17, 2015
Chicony Power Technology Co., Ltd., New Taipei, TW;
Yung-Hung Hsiao, New Taipei, TW;
Cheng-Chang Hsiao, New Taipei, TW;
CHICONY POWER TECHNOLOGY CO., LTD., New Taipei, TW;
Abstract
A power supply apparatus () includes a voltage input side (), a power switch circuit (), a voltage output side (), a pulse width modulation signal generating circuit () and a burst frequency detection circuit (). According to a pulse width modulation signal (), the pulse width modulation signal generating circuit () controls the power switch circuit (), so that the power supply apparatus () enters a burst mode. The burst frequency detection circuit () detects a burst frequency of the power switch circuit (). The burst frequency detection circuit () informs the pulse width modulation signal generating circuit () that the burst frequency is in an audio frequency range if the burst frequency is in the audio frequency range. The power supply apparatus () leaves from the burst mode to avoid audio noise.