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:
Dec. 20, 2005
Filed:
Sep. 02, 2003
Masashi Nogawa, Tama, JP;
Tetsuo Tateishi, Warwick, RI (US);
Masashi Nogawa, Tama, JP;
Tetsuo Tateishi, Warwick, RI (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A DC—DC converter can supply a stable output voltage from an input voltage with the power supply voltage varying along with the supply of the power and can maintain a high voltage conversion efficiency. The DC—DC converter includes an inductive element and the first-fourth switches connected to both terminals of the inductive element, the first and second switches are turned on and off periodically corresponding to the input voltage. When the input voltage goes below a prescribed reference level, a first control signal that keeps the first switch constantly on is generated by a feedforward control circuit to turn on the third and fourth switches periodically corresponding to the output voltage so that the output time of the third switch is generated by a feedback control circuit to switch the voltage increasing operation and the voltage increasing/decreasing operation corresponding to the input voltage.