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:
Jul. 05, 2011
Filed:
Mar. 26, 2008
Applicants:
Christophe Vaucourt, Langenbach, DE;
Erich Bayer, Thonhausen, DE;
Paul Brohlin, Parker, TX (US);
Inventors:
Assignee:
Texas Instruments Deutschland GmbH, Freising, DE;
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power supply circuit is proposed for supplying current to a pair of white LEDs connected in series. The circuit comprises a DC-DC power converter, with a charge pump coupled to the output of the DC-DC power converter. A super capacitor is coupled to the charge pump to be charged to a voltage on top of the converter output in a first mode of operation. The super capacitor is discharged through the pair of LEDs during a second mode of operation. A control stage is provided for switching between the first mode of operation and the second mode of operation.