Discharge lamp ballast circuit with charge pump igniter

Details Discharge lamp ballast circuit with charge pump igniter Discharge lamp ballast circuit with charge pump igniter

1999-09-21

2000-11-21

Philogene, Haissa

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

315 59, 315205, 315237, 315307, 315DIG5, H01J 744

Patent

active

06150761&

ABSTRACT:
A ballast for a compact fluorescent lamp includes a down-converter for operating the lamp with a DC current during stable operation and a charge pump for igniting the lamp. The converter includes an inductor and a first series circuit of a first diodie and a first switching element. An output capacitor shunts the lap terminals. The charge pump includes a second series circuit of second diodie and a second switching element coupled to the lamp terminals with the second diode polarized to prevent the discharge of the output capacitor when the second switching element is conductive. The inductor cooperates with the first and second diodes and the second switching element to build up the voltage across the outpout capacitor to the ignition voltage level of the lamp.

REFERENCES:
patent: 3875459 (1975-04-01), Remery et al.
patent: 5581161 (1996-12-01), Gong
patent: 5942883 (1999-08-01), Preis et al.
patent: 5955841 (1999-09-01), Moisin et al.

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