LED driver with adaptive algorithm for storage capacitor subpoena

Method for determining the pre-charge voltage of a storage capacitor for the purpose of driving a plurality of light emitting semiconductor devices in a plurality of output paths, each output path including at least a light-emitting semiconductor device and a current regulator for determining a current through an output path, the method comprising: (A) charging the storage capacitor with an initial supply voltage level and applying the initial supply voltage level to an output path, (B) controlling the current controller such that it generates a high current through the output path during a high power period of a predetermined length, (C) measuring a current level through the output path during the high current period, (D) comparing the measured power level with a minimum reference level, (E) increasing the supply voltage level at the storage capacitor when the sensed current level is below the minimum reference level, and performing the steps (a) to (d) with increased supply voltage level, otherwise (F) performing steps (a) to (e) for a different output path, and (G) detecting the highest minimum supply voltage level for the worst output path during this process ...