Method and circuit for regulating power in a high intensity...

Details Method and circuit for regulating power in a high intensity... Method and circuit for regulating power in a high intensity...

H - Electricity

05

B

H05B 41/36 (2006.01) H05B 41/16 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2512267

A circuit for controlling power to a high intensity discharge lamp is disclosed. The circuit according to one embodiment of the invention comprises a rectifier circuit coupled to receive an alternating current line voltage, and a boost/flyback converter coupled to the rectifier circuit which outputs a regulated DC bus voltage. A power control circuit also couples a feedback signal to the boost/flyback converter to regulate the power output of the boost/flyback converter. A method of controlling power to a high intensity discharge lamp is also disclosed. The method comprises steps of generating a DC voltage for the high intensity discharge lamp by way of a boost/flyback converter; monitoring the DC voltage and the current generated in the boost/flyback converter; and modifying the power output by the boost/flyback converter to regulate power based upon the voltage and the current.

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