Patent ID: 8334658
Filing Date: 2012-12-18
Classification: H05B,Y02B

Abstract:
1. A controller for use in a light emitting diode (LED) driver, comprising: an input circuit coupled to receive an ac input signal from an ac source; a dimmer disabler circuit coupled to be responsive to the input circuit to detect an absence of a portion of an ac half cycle from the ac input signal for one or more consecutive ac half cycles from the ac input signal; and a regulator circuit coupled to control a switching of a switch to regulate a transfer of energy from the ac input signal to a LED load to be coupled to an output of the LED driver, the dimmer disabler circuit coupled to disable the regulator circuit from switching the switch in response to the detection of the absence of the portion of the ac half cycle from the ac input signal for the one or more consecutive ac half cycles from the ac input signal.