Abstract: An electronic ballast system is intended to operate one or more fluorescent lamps and a subsystem with universal input from 108V to 305V, a battery, and battery charger, associated logic, and a provision for emergency lighting, as well as for operating at least one of any combination of fluorescent lamps. The electronic ballast system includes a circuit that allows for a fluorescent lamp to be energized without the preheating of its cathodes, a circuit for power factor correction that makes use of an average current mode implemented by a pulse-width modulator in order to derive a power factor that approaches unity for the electronic power circuit. The ballast circuit further comprises an electronic chip adapted to control the circuit and prevent high voltage increase in the lamps.

Abstract: An electronic ballast system is disclosed for operating one or more fluorescent lamps having a subsystem with universal input from 108V to 305V, a battery, along with a battery charger and associated logic, that provides for emergency lighting, as well for operating at least one of the fluorescent lamps. The electronic ballast system includes a circuit that allows for a fluorescent lamp to be energized without the preheating of it cathodes, as well as includes a circuit for power factor correction that uses of an average current mode implemented by a pulse-width modulator to derive a power factor for the electronic power circuit that approaches unity.

Abstract: An electronic ballast system is disclosed for operating one or more fluorescent lamps with and having a subsystem with universal input from 108V to 305V, a battery, along with a battery charger and associated logic, that provides for emergency lighting, as well as for operating at least one of the fluorescent lamps. The electronic ballast system includes a circuit that allows for a fluorescent lamp to be energized without the preheating of its cathodes, as well as includes a circuit for power factor correction that uses of an average current mode implemented by a pulse-width modulator to derive a power factor for the electronic power circuit that approaches unity.

Abstract: A circuit is provided for energizing one or more discharge lamps. The circuit is capable of being powered from one or two alternative AC voltage and comprises a transformer having a common first tap, a second tap and a third tap, and a dual voltage means which accepts power from a pair of AC source lines. The dual voltage circuit connects the AC source lines to either the first common first tap and the second tap, if the voltage is at the first AC voltage, or to the common tap and the third tap if the voltage is at the second AC voltage.