Power control methods and apparatus for variable loads

Details Power control methods and apparatus for variable loads Power control methods and apparatus for variable loads

2005-09-12

2009-06-02

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S086000

Reexamination Certificate

active

07542257

ABSTRACT:
A switching power supply is modified to mitigate potentially adverse effects of near zero loads on power delivery. In one example, a processor-controlled dummy load is coupled to the power supply output in addition to an actual load. The dummy load is controlled so that at least some minimal load is presented to the power supply when the actual load is drawing low or near zero power. In another example, the feedback loop of the switching power supply is modified to mitigate the effects of a potential overvoltage condition in a bias supply from which the switch controller of the power supply draws power, which condition may occur at low or near zero load power. A lighting system may include a switching power supply thusly modified to provide power to a variable load that includes one or more LED-based lighting apparatus.

REFERENCES:
patent: 5402059 (1995-03-01), Bittar
patent: 5640061 (1997-06-01), Bornhorst et al.
patent: 5786992 (1998-07-01), Vinciarelli et al.
patent: 6016038 (2000-01-01), Mueller et al.
patent: 6091614 (2000-07-01), Malenfant
patent: 6150774 (2000-11-01), Mueller et al.
patent: 6166496 (2000-12-01), Lys et al.
patent: 6211626 (2001-04-01), Lys et al.
patent: 6292901 (2001-09-01), Lys et al.
patent: 6304464 (2001-10-01), Jacobs et al.
patent: 6340868 (2002-01-01), Lys et al.
patent: 6369525 (2002-04-01), Chang et al.
patent: 6459919 (2002-10-01), Lys et al.
patent: 6495964 (2002-12-01), Muthu et al.
patent: 6510995 (2003-01-01), Muthu et al.
patent: 6528954 (2003-03-01), Lys et al.
patent: 6548967 (2003-04-01), Dowling et al.
patent: 6549429 (2003-04-01), Konno
patent: 6577080 (2003-06-01), Lys et al.
patent: 6586890 (2003-07-01), Min et al.
patent: 6608453 (2003-08-01), Morgan et al.
patent: 6618031 (2003-09-01), Bohn, Jr. et al.
patent: 6624597 (2003-09-01), Dowling et al.
patent: 6667583 (2003-12-01), Kerenyi
patent: 6717376 (2004-04-01), Lys et al.
patent: 6720745 (2004-04-01), Mueller et al.
patent: 6734639 (2004-05-01), Chang et al.
patent: 6756771 (2004-06-01), Ball et al.
patent: 6768047 (2004-07-01), Chang et al.
patent: 6774584 (2004-08-01), Lys et al.
patent: 6777891 (2004-08-01), Lys et al.
patent: 6781329 (2004-08-01), Morgan et al.
patent: 6788011 (2004-09-01), Mueller et al.
patent: 6801003 (2004-10-01), Schanberger et al.
patent: 6806659 (2004-10-01), Mueller et al.
patent: 6836081 (2004-12-01), Swanson et al.
patent: 6853150 (2005-02-01), Clauberg et al.
patent: 6869204 (2005-03-01), Piepgras et al.
patent: 6883929 (2005-04-01), Dowling
patent: 6888322 (2005-05-01), Dowling et al.
patent: 6888529 (2005-05-01), Bruning et al.
patent: 6897624 (2005-05-01), Ducharme et al.
patent: 6930452 (2005-08-01), De Krijger et al.
patent: 6930893 (2005-08-01), Vinciarelli
patent: 6936978 (2005-08-01), Morgan et al.
patent: 6965205 (2005-11-01), Piepgras et al.
patent: 6967448 (2005-11-01), Morgan et al.
patent: 6969954 (2005-11-01), Lys
patent: 6975079 (2005-12-01), Lys et al.
patent: 7294989 (2007-11-01), Saren
patent: 2002/0038157 (2002-03-01), Dowling et al.
patent: 2002/0044066 (2002-04-01), Dowling et al.
patent: 2002/0048169 (2002-04-01), Dowling et al.
patent: 2002/0070688 (2002-06-01), Dowling et al.
patent: 2002/0074559 (2002-06-01), Dowling et al.
patent: 2002/0078221 (2002-06-01), Blackwell et al.
patent: 2002/0130627 (2002-09-01), Dowling et al.
patent: 2002/0145394 (2002-10-01), Morgan et al.
patent: 2002/0145869 (2002-10-01), Dowling
patent: 2002/0152045 (2002-10-01), Dowling et al.
patent: 2002/0158583 (2002-10-01), Lys et al.
patent: 2002/0176259 (2002-11-01), Ducharme
patent: 2003/0011538 (2003-01-01), Lys et al.
patent: 2003/0028260 (2003-02-01), Blackwell
patent: 2003/0057884 (2003-03-01), Dowling et al.
patent: 2003/0057887 (2003-03-01), Dowling et al.
patent: 2003/0076281 (2003-04-01), Morgan et al.
patent: 2003/0085749 (2003-05-01), Xu et al.
patent: 2003/0100837 (2003-05-01), Lys et al.
patent: 2003/0133292 (2003-07-01), Mueller et al.
patent: 2003/0222587 (2003-12-01), Dowling et al.
patent: 2004/0036006 (2004-02-01), Dowling
patent: 2004/0052076 (2004-03-01), Mueller et al.
patent: 2004/0090191 (2004-05-01), Mueller et al.
patent: 2004/0090787 (2004-05-01), Dowling et al.
patent: 2004/0095185 (2004-05-01), Bucks et al.
patent: 2004/0105261 (2004-06-01), Ducharme et al.
patent: 2004/0113568 (2004-06-01), Dowling et al.
patent: 2004/0116039 (2004-06-01), Mueller et al.
patent: 2004/0130909 (2004-07-01), Mueller et al.
patent: 2004/0145320 (2004-07-01), Nijhof et al.
patent: 2004/0178751 (2004-09-01), Mueller et al.
patent: 2004/0212320 (2004-10-01), Dowling et al.
patent: 2004/0212321 (2004-10-01), Lys et al.
patent: 2004/0212993 (2004-10-01), Morgan et al.
patent: 2005/0029527 (2005-02-01), Yamamoto et al.
patent: 2005/0099824 (2005-05-01), Dowling et al.
patent: 2005/0116667 (2005-06-01), Mueller et al.
patent: 2005/0122065 (2005-06-01), Young
patent: 2005/0151489 (2005-07-01), Lys et al.
patent: 2005/0213352 (2005-09-01), Lys et al.
patent: 2005/0213353 (2005-09-01), Lys
patent: 2005/0218838 (2005-10-01), Lys
patent: 2005/0218870 (2005-10-01), Lys
patent: 2005/0219872 (2005-10-01), Lys
patent: 2005/0231133 (2005-10-01), Lys
patent: 2005/0236029 (2005-10-01), Dowling
patent: 2005/0236998 (2005-10-01), Mueller
patent: 2005/0253533 (2005-11-01), Lys et al.
patent: 2005/0275626 (2005-12-01), Mueller
patent: 2005/0276053 (2005-12-01), Nortrup
patent: 2006/0002110 (2006-01-01), Dowling
patent: 03/069958 (2003-08-01), None
patent: 2004/057924 (2004-07-01), None
patent: 2004/100612 (2004-11-01), None
patent: 2004/100614 (2004-11-01), None
patent: 2005/009086 (2005-01-01), None
Adragna, Claudio et al., AN1060, Application Note, Flyback Converters With the L6561 PFC Controller, Jun. 2001, 11 pages, www.datasheetcatalog.com.
Adragna, Claudio, AN1007, Application Note, L6561—Based Switcher Replaces Mag Amps in Silver Boxes, Mar. 1998, 6 pages, www.datasheetcatalog.com.
Adragna, Claudio, AN1059, Application Note, Design Equations of High-Power-Factor Flyback Converters Based on the L6561, Sep. 2003, 20 pages, www.datasheetcatalog.com.
Adragna, Claudio, AN1792, Application Note, Design of Fixed-Off-Time-Controlled PFC Pre-Regulators With the L6562, Nov. 2003, 30 pages, www.datasheetcatalog.com.
Adragna, Claudio, AN966, Application Note, L6561, Enhanced Transition Mode Power Factor Corrector, Oct. 2001, 20 pages, www.datasheetcatalog.com.
Salati, Luca, AN1757, Application Note, Switching From the L6561 to the L6562, Apr. 2004, 9 pages, www.datasheetcatalog.com.

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