CPC H05B 45/50 (2020.01) [G01R 19/16571 (2013.01); H05B 45/14 (2020.01); H05B 45/355 (2020.01); H05B 45/3725 (2020.01)] | 20 Claims |
1. A light driver comprising:
a converter configured to generate a drive current based on a rectified input signal for driving a light source; and
an output correction circuit coupled to an output of the converter and configured to measure the drive current and to generate a correction signal to dynamically control a DC-level of the drive current of the converter based on the drive current and a reference signal corresponding to a desired DC-level of the drive current, the output correction circuit comprising:
a sense resistor in a current path of the drive current and configured to generate a sensed signal corresponding to the drive current;
a signal amplifier coupled to the sense resistor and configured to generate an amplified signal by amplifying the sensed signal; and
a reference generator configured to calculate an average signal based on the amplified signal and to generate an adjusted reference signal based on the amplified signal and the average signal.
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