Patent ID: 8723441
Filing Date: 2014-05-13
Classification: H05B,Y02B

Abstract:
1. A method for regulating a LED current flowing through a LED circuit arrangement at a mean LED current level, the method comprising: establishing a converter current; establishing a first current control indicator representative of a current level of the converter current; establishing an oscillation of the converter current between a valley current level and a peak current level in dependence on at least the first current control indicator, wherein the mean LED current level corresponds to a weighted average of the peak current level and the valley current level of the converter current; establishing a second current control indicator representative of a flow of the converter current; controlling a converter current period of the oscillation of the converter current to be within a period control range, the controlling being performed in dependence on at least the second current control indicator, and feeding the LED circuit arrangement with at least part of the converter current.