Transformerless electronic ballast for gaseous discharge lamps

Details Transformerless electronic ballast for gaseous discharge lamps Transformerless electronic ballast for gaseous discharge lamps

1995-06-05

1997-10-21

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315DIG5, 315176, 315289, 315205, H05B 3700

Patent

active

056800169

ABSTRACT:
A transformerless ballast for a gaseous discharge lamp is disclosed. The ballast comprises: a rectifier; a filter for the rectifier output; a voltage divider for the filter output; an electronic gate modulating the filter output to power a lamp when the lamp is lit; a controller controlling the electronic gate responsive to variations in lamp impedance and to variations in the voltage divider output; an oscillator generating an output for predetermined period of time until after the lamp is lit; and an amplifier receiving and amplifying the oscillator output for powering the lamp when the lamp is unlit.

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