Title:
METHOD AND APPARATUS OF AN IMPROVED ELECTRONICS BALLAST CIRCUIT
Document Type and Number:
WIPO Patent Application WO2001069984
Kind Code:
A3
Abstract:
A ballast circuit adaptive to changes in the input voltage capable of providing a "floating" high output voltage for the operation of fluorescent lamps. The present invention employs an output voltage "floating" design in adjusting the high output voltage in response to the voltage difference between the output voltage and the rectified input voltage (i.e. error voltage) without using a feedback path from the output voltage.
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Inventors:
CHEN HONG-CHENG (CN)
Application Number:
PCT/US2001/007888
Publication Date:
April 18, 2002
Filing Date:
March 13, 2001
Export Citation:
Assignee:
LAPLAZ LIGHT CO INC (US)
CHEN HONG CHENG (CN)
CHEN HONG CHENG (CN)
International Classes:
H02M1/00; H02M1/42; H05B41/28; H05B41/282; H05B41/36; (IPC1-7): H05B41/28; H05B41/36; H02M1/00
Foreign References:
| US5834906A | 1998-11-10 | |||
| US5757166A | 1998-05-26 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 018, no. 324 (E - 1564) 20 June 1994 (1994-06-20)
MOTOROLA INC.: "Power Factor Controllers (MC34262) & (MC33262)", MOTOROLA ANALOG IC DEVICE DATA, 1996, PHOENIX, USA, pages 1 - 15, XP002179639
PHILIP C. TODD: "UC3854 Controlled Power Factor Correction Circuit Design", UNITRODE APPLICATION NOTE U-134, 1999, Merrimack, USA, pages 3269 - 3289, XP002179640
MOTOROLA INC.: "Power Factor Controllers (MC34262) & (MC33262)", MOTOROLA ANALOG IC DEVICE DATA, 1996, PHOENIX, USA, pages 1 - 15, XP002179639
PHILIP C. TODD: "UC3854 Controlled Power Factor Correction Circuit Design", UNITRODE APPLICATION NOTE U-134, 1999, Merrimack, USA, pages 3269 - 3289, XP002179640
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