Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1999-11-10
2000-11-07
Wong, Don
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315224, 315276, H05B 3702
Patent
active
061441732
ABSTRACT:
A lighting circuit (A) includes an input (10), which supplies a single switch ballast (12), which in turn powers a lamp (14). Ballast (12) is in a self-starting, self-oscillating class E converter configuration, which allows for adjustment of the switching duty ratio. Self-oscillation occurs due to the use of regenerative feedback path consisting of a first winding (36), feedback inductor (40), and charging capacitor 42. Increasing output to MOSFET switch (34) occurs once MOSFET switch (34) has been biased to an on state through inputs from input circuit (12), which have been supplied from current source (32). Adjustment of the switching ratio for MOSFET switch (34) is accomplished by selection of appropriate values for zener diodes (48, 50), wherein the voltage breakdown of the zener diode 50 is greater than zener diode 48 reduce the duty ratio to less than 50%, thereby reducing the voltage rating of the switch. Control of the switching ratio allows for switches with lower voltage ratings when driving lamp (14) in this single switching configuration.
REFERENCES:
patent: 4245178 (1981-01-01), Justice
patent: 4418297 (1983-11-01), Marshall
patent: 4607323 (1986-08-01), Sokal et al.
patent: 4716343 (1987-12-01), Lindquist
patent: 4902938 (1990-02-01), Lindquist
patent: 5001399 (1991-03-01), Layden
patent: 5059868 (1991-10-01), El-Hamamsy et al.
patent: 5065300 (1991-11-01), Jacobson et al.
patent: 5151852 (1992-09-01), Jacobson et al.
patent: 5179511 (1993-01-01), Troyk et al.
patent: 5387850 (1995-02-01), Bray et al.
patent: 5406177 (1995-04-01), Nerone
patent: 5453665 (1995-09-01), Konopka
patent: 5640313 (1997-06-01), Takehara et al.
patent: 5666279 (1997-09-01), Takehara et al.
patent: 5680034 (1997-10-01), Redl
patent: 5694006 (1997-12-01), Konopka
patent: 5757166 (1998-05-01), Sodhi
patent: 5798616 (1998-08-01), Takehara et al.
patent: 5818709 (1998-10-01), Takehara
patent: 5834907 (1998-11-01), Takehara
patent: 5877596 (1999-03-01), Allison
patent: 5914570 (1999-06-01), Nerone et al.
patent: 5945783 (1999-08-01), Schultz et al.
patent: 6008589 (1999-12-01), Deng et al.
General Electric Company
Tran Thuy Vinh
Wong Don
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