According to some embodiments, there is provided a power supply system including a converter configured to generate an output signal based on a rectified input signal for driving a light source, an output correction circuit coupled to an output of the converter and configured to measure a ripple in the output signal and to generate a correction signal to dynamically control a DC-level of the output signal of the converter based on the measured ripple and a reference signal corresponding to a desired DC-level of the output signal.