Electronic ballast with rail voltage switching

Details Electronic ballast with rail voltage switching Electronic ballast with rail voltage switching

2006-08-15

2006-08-15

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

C315S2090SC, C315S274000

Reexamination Certificate

active

07091671

ABSTRACT:
The present invention provides a high frequency electronic ballast with rail voltage switching which adjusts the DC rail voltage output (208) to account for different voltages of mains power (210), improving efficiency. The rail voltage switching comprises a mains power supply (200) providing mains power (210) and a mains voltage signal (212); a ballast microcontroller (206) responsive to the mains voltage signal (212) and generating a power factor correction (PFC) voltage signal (214); and a converter (204) operably connected to the mains power supply (200) and responsive to the PFC voltage signal (214) to generate a DC rail voltage output (208). For an embodiment using power factor control, the converter (204) comprises a coil (218), power factor correction (224), a switch (220), and a rectifier (222).

REFERENCES:
patent: 5528111 (1996-06-01), Konopka et al.
patent: 5811941 (1998-09-01), Barton
patent: 5969481 (1999-10-01), Konopka
patent: 6049179 (2000-04-01), Kisaichi et al.
patent: 6157168 (2000-12-01), Malik
patent: 6498436 (2002-12-01), Hartge et al.

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