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. 14, 2009
Filed:
Apr. 20, 2005
Hidenori Kobayashi, Tokyo, JP;
Hidenori Kobayashi, Tokyo, JP;
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A current mode controlled DC/DC converter that includes an adaptive clamp voltage circuit at an error amplifier output to significantly reduce overshoot in the output of the converter if the target voltage changes rapidly. If a current limiter is active, the clamp level of the adaptive clamp voltage circuit is decreased at an appropriate rate. Similarly, if the current limiter is not activated, the adaptive clamp voltage circuit is restored to an initial clamp level. The operation of the adaptive clamp circuit at the output of the error amplifier enables a relatively faster reduction in both overshoot and the amount of time before the converter's output voltage and output current settle back down to a relatively constant state.