Patent ID: 8471501
Filing Date: 2013-06-25
Classification: H05B,Y02B

Abstract:
1. An illumination brightness control apparatus for receiving an input voltage from a light dimmer to produce a control signal to regulate a drive signal to a power conversion switch of a switching mode power converter, the illumination control apparatus comprising: a voltage conditioning circuit to condition the dimmer input voltage to provide a conditioned voltage signal; an ADC circuit, coupled to receive the conditioned voltage, to sample analog data of the conditioned voltage signal at a sampling rate that is high relative to a nominal variation rate of the dimmer input voltage and to provide digital data corresponding to the sampled analog data; a digital signal processing circuit, coupled to receive the digital data provided by the ADC circuit, to produce a running data average of the digital data; and a controller, coupled to receive the running data average, to produce a signal corresponding to the running data average as the control signal to regulate the drive signal.