Inventors:
Venkatesh Chitta - Center Valley PA, US
Jonathan Robert Quayle - Bethlehem PA, US
Alexander J. Rovnan - Lancaster PA, US
Mark S. Taipale - Harleysville PA, US
Dragan Veskovic - Allentown PA, US
Assignee:
Lutron Electronics Co., Inc. - Coopersburg PA
International Classification:
H05B 37/02
H05B 39/04
H05B 41/36
H05B 37/00
H05B 39/00
H05B 41/14
H05B 41/16
H05B 41/24
H05B 41/00
US Classification:
315210, 315201, 315246, 315312
Abstract:
A load control device, such as an electronic ballast, for controlling the power delivered from an AC power source to an electrical load, such as one or more fluorescent lamps, comprises a power converter having an inductor and a power switching device coupled to the inductor, a load control circuit adapted to be coupled to the electrical load, and a control circuit operable to calculate an average input power of the load control device. The control circuit may be operable to calculate a cumulative output power of the power converter while the ballast is preheating filaments of the lamps, and to subsequently determine a fault condition in the lamps in response to the calculated cumulative output power of the power converter. Further, the control circuit may be operable to transmit a digital message including the calculated average input power of the load control device.