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:
Apr. 21, 2020
Filed:
Feb. 22, 2019
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Kensuke Takahashi, Shiga, JP;
Takashi Saji, Shiga, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02M 1/08 (2006.01); H02M 1/44 (2007.01); H02M 1/00 (2006.01); H02M 1/36 (2007.01);
U.S. Cl.
CPC ...
H02M 3/33523 (2013.01); H02M 1/08 (2013.01); H02M 1/44 (2013.01); H02M 3/33507 (2013.01); H02M 1/36 (2013.01); H02M 2001/0006 (2013.01); H02M 2001/0009 (2013.01); H02M 2001/0032 (2013.01);
Abstract
A switching power supply device has both a turn-on timing modulation function and a turn-off timing modulation function, performs the turn-off timing modulation in a PFM control region and the turn-on timing modulation in a PWM control region, and further continues at least one of the modulations even after the PFM control and the PWM control are switched from one to the other, to achieve a stable operation of the switching power supply device at the control switching boundary without significantly decreasing the modulation effect of frequency jitter control.