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. 23, 2013
Filed:
Jun. 22, 2011
Applicant:
Yu-nung Tsai, New Taipei, TW;
Inventor:
Yu-Nung Tsai, New Taipei, TW;
Assignee:
Richtek Technology Corporation, R.O.C., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/46 (2006.01); G05F 1/575 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention discloses a control circuit for reducing output ripple in a constant on-time switching regulator and a method thereof, for controlling a power stage. The control circuit determines whether a zero current period wherein an output current is zero is longer than a threshold period, and switches the on-time period to a shorter period if it is longer, whereby the power stage operates according to the shorter period while still in the discontinuous conduction mode (DCM).