An LED driving apparatus according to an exemplary embodiment of the present inventive concept may include a rectifier circuit rectifying alternating current (AC) power to generate driving power for operating a plurality of LED arrays; a controller integrated circuit (IC) including a plurality of internal switches connected to respective output terminals of the plurality of LED arrays and controlling a path of a current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches according to a magnitude of the driving power; and a current controlling circuit connected to the output terminal of at least one of the plurality of LED arrays and controlling a current flowing in the at least one LED array.