Power supply for LED light sources

摘要

The inventive power supply (10) for an LED light source (11) comprises two flyback converters (19) and (20) which are connected in parallel and which are controlled by a single control unit (27). A measuring unit (39) may be provided which acquires at least one of the voltage drop across the LED light source (11), the current flowing through the LED light source (11), or the power supplied to the LED light source (11). The two flyback converters (19) and (20) are preferably operating in interleaved fashion so that the two switches S1 and S2 alternately open and close. Nonetheless, the control unit may define duty cycles different from 50% so that periods may exist in which both switches S1 and S2 are closed and/or periods in which both switches S1 and S2 are open.