Fuzzy logic controller based multi-port LED driving

This paper is composed of an interleaved connection of resonant converter with snubber to drive multiple port light emitting diodes (LEDs) to achieve constant voltage. For an LLC converter the transformer is provided with very large value of inductance and therefore the magnetizing current in the secondary winding of the transformer has an effect on the current to the LED. The current balancing among LED string is highly improved. A high efficiency is guaranteed with a wide load range. Hence this structure is a convinient module for more then one channel LED driving application. A Fuzzy Logic control is a critical thinking control framework strategy utilized for keeping up the LED driver voltage constant with a power factor of 0.987.

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