Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2011-01-04
2011-01-04
Owens, Douglas W (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S291000, C315S308000
Reexamination Certificate
active
07863833
ABSTRACT:
A control circuit is provided for a separately excited DC/DC converter which directly monitors output voltage to detect a short-circuit state, and performs overcurrent protection. A switching controller of the control circuit controls a switching operation of a switching transistor of the separately excited DC/DC converter. A voltage comparator compares the output voltage and a threshold voltage, to detect the short-circuit state. After a predetermined start-up time has elapsed after beginning start-up of the separately excited DC/DC converter, when the voltage comparator detects the short-circuit state, the switching controller halts the switching operation of the switching transistor, and makes detection of the short-circuit state by the voltage comparator non-operative before elapse of the start-up time. After detecting the short-circuit state and halting the switching operation of the switching transistor for a predetermined halt time, the switching controller begins start-up of the separately excited DC/DC converter once again.
REFERENCES:
patent: 2004/0136206 (2004-07-01), Kinoshita et al.
patent: 2005/0024898 (2005-02-01), Yang et al.
patent: 1-318543 (1989-12-01), None
patent: 2-49332 (1990-04-01), None
patent: 5-328711 (1993-12-01), None
patent: 8-234852 (1996-09-01), None
patent: 11-89220 (1999-03-01), None
patent: 11-252907 (1999-09-01), None
patent: 2002-374671 (2002-12-01), None
patent: 2004-71428 (2004-03-01), None
patent: 2004-104942 (2004-04-01), None
patent: 2004-208382 (2004-07-01), None
Written Opinion of the International Searching Authority for PCT/JP2006-311065; date of mailing: Aug. 29, 2006.
International Search Report for International Application No. PCT/JP2006/311065 mailed Aug. 29, 2006.
Chinese Office Action for Chinese Patent Application No. 200680001887.X issued Jan. 23, 2009 with English Translation.
Araki Kyoichiro
Tamegai Yoichi
Yamamoto Isao
Cantor & Colburn LLP
Chen Jianzi
Owens Douglas W
Rohm & Co., Ltd.
LandOfFree
DC/DC converter control circuit, and power supply apparatus,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with DC/DC converter control circuit, and power supply apparatus,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC/DC converter control circuit, and power supply apparatus,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2721336