Patents by Inventor Constantin Spiridon
Constantin Spiridon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8289731Abstract: A converter controller is disclosed. In one embodiment, a controller for a flyback converter includes a converter and a flyback controller. The converter is coupled to the flyback converter for receiving an auxiliary voltage and for generating a constant power voltage. The flyback controller is powered by the constant power voltage for controlling an output voltage of the flyback converter. Furthermore, the flyback converter comprises a transformer with a primary side and a secondary side. The output voltage and the auxiliary voltage are produced at the transformer.Type: GrantFiled: June 5, 2007Date of Patent: October 16, 2012Assignee: O2Micro Inc.Inventors: Constantin Spiridon, Dan Simion, Eftimie Caraghiorghiopol
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Patent number: 7969043Abstract: An electronic system includes a plurality of primary power sources operable for powering a load and charging a secondary power source, and a power management unit coupled to the plurality of primary power sources and the secondary power source. The power management unit is operable for selectively directing power of each of the primary power sources to the load according to a power requirement of the load. The power management unit is further operable for directing power of the secondary power source to the load if the power requirement of the load exceeds a total power capacity of the plurality of primary power sources.Type: GrantFiled: November 3, 2008Date of Patent: June 28, 2011Assignee: O2 Micro, Inc.Inventors: Eftimie Caraghiorghiopol, Constantin Spiridon, Tzu-Ching Yang
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Publication number: 20110121653Abstract: A system may include an electronic device configured to consume a supply current; an AC to DC adapter configured to be coupled to the electronic device, wherein the AC to DC adapter has a maximum rated output current; a battery configured to be coupled to the electronic device; DC to DC converter configured to be coupled to the battery and the electronic device; and a controller configured to couple the AC to DC adapter to the electronic device, the controller further configured to couple the DC to DC converter to the battery and the electronic device when the supply current exceeds the maximum rated output current of the AC to DC adapter.Type: ApplicationFiled: May 18, 2010Publication date: May 26, 2011Applicant: O2MICRO INTERNATIONAL LIMITEDInventors: Alexandru Hartular, Laszlo Lipcsei, Marian Niculae, Constantin Spiridon
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Patent number: 7573240Abstract: A method is used for charging a battery. According to the method of the present invention, the battery is first charged to a predetermined voltage at a substantially constant current. Then, the charging current is disabled. A pulsing current is applied to the battery for charging the battery.Type: GrantFiled: April 25, 2005Date of Patent: August 11, 2009Assignee: 02Micro International LimitedInventor: Constantin Spiridon
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Publication number: 20090115252Abstract: An electronic system includes a plurality of primary power sources operable for powering a load and charging a secondary power source, and a power management unit coupled to the plurality of primary power sources and the secondary power source. The power management unit is operable for selectively directing power of each of the primary power sources to the load according to a power requirement of the load. The power management unit is further operable for directing power of the secondary power source to the load if the power requirement of the load exceeds a total power capacity of the plurality of primary power sources.Type: ApplicationFiled: November 3, 2008Publication date: May 7, 2009Inventors: Eftimie Caraghiorghiopol, Constantin Spiridon, Tzu-Ching Yang
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Publication number: 20080304293Abstract: A converter controller is disclosed. In one embodiment, a controller for a flyback converter includes a converter and a flyback controller. The converter is coupled to the flyback converter for receiving an auxiliary voltage and for generating a constant power voltage. The flyback controller is powered by the constant power voltage for controlling an output voltage of the flyback converter. Furthermore, the flyback converter comprises a transformer with a primary side and a secondary side. The output voltage and the auxiliary voltage are produced at the transformer.Type: ApplicationFiled: June 5, 2007Publication date: December 11, 2008Inventors: Constantin Spiridon, Dan Simion, Eftimie Caraghiorghiopol
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Publication number: 20060291259Abstract: A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, or power requirements of the portable device. Using the feedback data, the external AC/DC adapter can adjust the DC output to meet the charging requirement of the battery and/or the power requirements of the portable device.Type: ApplicationFiled: August 8, 2006Publication date: December 28, 2006Applicant: O2MICRO INTERNATIONAL LIMITEDInventors: William Densham, Vlad Popescu-Stanesti, Constantin Spiridon
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Patent number: 7088076Abstract: A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, or power requirements of the portable device. Using the feedback data, the external AC/DC adapter can adjust the DC output to meet the charging requirement of the battery and/or the power requirements of the portable device.Type: GrantFiled: October 14, 2003Date of Patent: August 8, 2006Assignee: O2Micro International LimitedInventors: William L. Densham, Vlad Mihail Popescu-Stanesti, Constantin Spiridon
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Publication number: 20060113962Abstract: A method is used for charging a battery. According to the method of the present invention, the battery is first charged to a predetermined voltage at a substantially constant current. Then, the charging current is disabled. A pulsing current is applied to the battery for charging the battery.Type: ApplicationFiled: April 25, 2005Publication date: June 1, 2006Inventor: Constantin Spiridon
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Patent number: 6741066Abstract: A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, or power requirements of the portable device. Using the feedback data, the external AC/DC adapter can adjust the DC output to meet the charging requirement of the battery and/or the power requirements of the portable device.Type: GrantFiled: September 21, 2001Date of Patent: May 25, 2004Assignee: O2Micro International LimitedInventors: William L. Densham, Vlad Mihail Popescu-Stanesti, Constantin Spiridon
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Publication number: 20040075418Abstract: A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, or power requirements of the portable device. Using the feedback data, the external AC/DC adapter can adjust the DC output to meet the charging requirement of the battery and/or the power requirements of the portable device.Type: ApplicationFiled: October 14, 2003Publication date: April 22, 2004Inventors: William L. Densham, Vlad Mihail Popescu-Stanesti, Constantin Spiridon
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Patent number: 6507173Abstract: A power management unit (PMU) apparatus and method may include: a bi-directional pin configured to serve as an input pin during a first condition and as an output pin during a second condition; or a battery charge controller for providing a first conditioning charge and a second full charge to a voltage source of the PMU; or an adapter detector configured to detect the presence of a continuous output adapter and a pulse output adapter; an under voltage lockout protection circuit to prevent start up of the PMU until a power source reaches a predetermined threshold lockout level and to shut down the PMU once the power source reaches a lower threshold lockout disabling level; or a plurality of internal switches for allowing an external switch to have multiple functions; or a power on reset circuit; or multi-output charge status pin.Type: GrantFiled: September 13, 2001Date of Patent: January 14, 2003Assignee: 02 Micro International LimitedInventors: Constantin Spiridon, Vlad Mihail Popescu-Stanesti, You-Yuh Shyr, Alexandru Hartular, William L. Densham, III