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:
May. 24, 2016
Filed:
Nov. 28, 2012
Ams Ag, Unterpremstätten, AT;
Mario Teufel, Gratwein, AT;
AMS AG, Unterpremstaetten, AT;
Abstract
In one embodiment, a driver circuit for light-emitting diodes has a first DC/DC converter (DCDC) with an input (IN) for feeding a supply voltage (VBAT) and with a first output (OUT), a second DC/DC converter (DCDC), which is coupled on the output side to the first output (OUT) and is designed for operation with energy supplied in advance, a current source (IFlash) that is connected to the first output (OUT), and a main output (LED_OUT), which is coupled to the current source (IFlash) and is designed to be connected to the light-emitting diodes. The first DC/DC converter (DCDC) is designed for operation in a current-limiting mode. The second DC/DC converter (DCDC) is designed for regulation to a nominal voltage (Vds) of the current source (IFlash).