LED LIGHTING DRIVING CIRCUIT, SEMICONDUCTOR INTERGRATED CIRCUIT, AND LIGHTING FIXTURE

摘要

PROBLEM TO BE SOLVED: To provide an LED lighting driving circuit by which the supply of a current to an LED module is stopped when all the LED lines are disconnected.;SOLUTION: The LED lighting driving circuit 5 includes: an AC power supply AC for outputting an AC voltage, a power factor improvement part 51 for improving a power factor; a power factor control part 52 for controlling the power factor improvement part 51; a synchronous rectification type chopper 53 for outputting a DC current to the LED module 7 based on the AC voltage output from the AC power supply AC; a driver 54 for controlling the synchronous rectification type chopper 53; a stop circuit 55 through which a current output stop signal to request stop of current output to the LED module 7 by the synchronous rectification type chopper 53 is transmitted to the power factor improvement control part 52 and the driver 54; and an abnormality detection part 56 for detecting disconnection of LED lines 7A, 7B, 7C or unconnection to the LED module 7.;COPYRIGHT: (C)2010,JPO&INPIT