Patents by Inventor Catalin Popovici
Catalin Popovici 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: 7656684Abstract: The present disclosure is directed towards a method for power conversion. The method may include controlling a first rectifier switch coupled to one end of a secondary winding of a transformer via a first control signal. The method may further include controlling a first low side switch via said first control signal, said first low side switch and a first high side switch coupled in series along a first path of a full bridge circuit, a first node located between said first high side switch and said first low side switch. The method may also include controlling a second rectifier switch coupled to an opposite end of said secondary winding via a second control signal.Type: GrantFiled: April 29, 2008Date of Patent: February 2, 2010Assignee: O2Micro International LimitedInventors: Laszlo Lipcsei, Catalin Popovici
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Patent number: 7602620Abstract: A controller for providing out of phase drive signals to a power converter having at least a first power unit and second power unit. The controller may comprise input circuitry adapted to receive a first signal from a first path and a second signal from a second path and provide an output signal in response to a difference between the first and second signals. The first signal may be representative of a current level of the first power unit during a first time interval and the first signal representative of a current level of the second power unit during a second time interval. The controller may further comprise output circuitry responsive to the output signal from the input circuitry to provide the out of phase drive signals to the first and second power unit.Type: GrantFiled: December 30, 2004Date of Patent: October 13, 2009Assignee: O2Micro International LimitedInventors: Laszlo Lipcsei, Catalin Popovici
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Patent number: 7599199Abstract: A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches responsive to at least one control signal to short both the primary and secondary winding during a first reset time interval. An electronic device including such a power converter and related methods are also provided. A power converter having a plurality of DC to DC converters coupled in parallel is also provided.Type: GrantFiled: December 4, 2007Date of Patent: October 6, 2009Assignee: O2Micro International LimitedInventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20080232139Abstract: The present disclosure is directed towards a method for power conversion. The method may include controlling a first rectifier switch coupled to one end of a secondary winding of a transformer via a first control signal. The method may further include controlling a first low side switch via said first control signal, said first low side switch and a first high side switch coupled in series along a first path of a full bridge circuit, a first node located between said first high side switch and said first low side switch. The method may also include controlling a second rectifier switch coupled to an opposite end of said secondary winding via a second control signal.Type: ApplicationFiled: April 29, 2008Publication date: September 25, 2008Applicant: O2MICRO INTERNATIONAL LIMITEDInventors: Laszlo Lipcsei, Catalin Popovici
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Patent number: 7365995Abstract: A power converter may include a transformer having a primary winding and a secondary winding. A first high side switch and a first low side switch may be coupled in series along a first path of a full bridge circuit, having a first node between the first high side switch and the first low side switch. The power converter may also comprise a second high side switch and a second low side switch coupled in series along a second path of the full bridge circuit, having a second node between the second high side switch and the second low side switch. The power converter may further comprise a first path capable of providing a first rectifier drive signal from the first node to a second rectifier switch, and a second path capable of providing a second rectifier drive signal from the second node to a first rectifier switch.Type: GrantFiled: January 30, 2006Date of Patent: April 29, 2008Assignee: O2Micro International LimitedInventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20080094858Abstract: A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches responsive to at least one control signal to short both the primary and secondary winding during a first reset time interval. An electronic device including such a power converter and related methods are also provided. A power converter having a plurality of DC to DC converters coupled in parallel is also provided.Type: ApplicationFiled: December 4, 2007Publication date: April 24, 2008Applicant: O2MICRO INTERNATIONAL LIMITEDInventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20080089098Abstract: A controller for providing out of phase drive signals to a power converter having at least a first power unit and second power unit. The controller may comprise input circuitry adapted to receive a first signal from a first path and a second signal from a second path and provide an output signal in response to a difference between the first and second signals. The first signal may be representative of a current level of the first power unit during a first time interval and the first signal representative of a current level of the second power unit during a second time interval. The controller may further comprise output circuitry responsive to the output signal from the input circuitry to provide the out of phase drive signals to the first and second power unit.Type: ApplicationFiled: December 30, 2004Publication date: April 17, 2008Inventors: Laszlo Lipcsei, Catalin Popovici
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Patent number: 7304866Abstract: A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches responsive to at least one control signal to short both the primary and secondary winding during a first reset time interval. An electronic device including such a power converter and related methods are also provided. A power converter having a plurality of DC to DC converters coupled in parallel is also provided.Type: GrantFiled: February 10, 2004Date of Patent: December 4, 2007Assignee: O2Micro International LimitedInventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20060120116Abstract: A power converter may include a transformer having a primary winding and a secondary winding. A first high side switch and a first low side switch may be coupled in series along a first path of a full bridge circuit, having a first node between the first high side switch and the first low side switch. The power converter may also comprise a second high side switch and a second low side switch coupled in series along a second path of the full bridge circuit, having a second node between the second high side switch and the second low side switch. The power converter may further comprise a first path capable of providing a first rectifier drive signal from the first node to a second rectifier switch, and a second path capable of providing a second rectifier drive signal from the second node to a first rectifier switch.Type: ApplicationFiled: January 30, 2006Publication date: June 8, 2006Inventors: Laszlo Lipcsei, Catalin Popovici
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Patent number: 7023709Abstract: A power converter may include a transformer having a primary winding and a secondary winding. A first high side switch and a first low side switch may be coupled in series along a first path of a full bridge circuit, having a first node between the first high side switch and the first low side switch. The power converter may also comprise a second high side switch and a second low side switch coupled in series along a second path of the full bridge circuit, having a second node between the second high side switch and the second low side switch. The power converter may further comprise a first path capable of providing a first rectifier drive signal from the first node to a second rectifier switch, and a second path capable of providing a second rectifier drive signal from the second node to a first rectifier switch.Type: GrantFiled: December 30, 2004Date of Patent: April 4, 2006Assignee: O2Micro International LimitedInventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20050190581Abstract: A controller for providing out of phase drive signals to a power converter having at least a first power unit and second power unit. The controller may comprise input circuitry adapted to receive a first signal from a first path and a second signal from a second path and provide an output signal in response to a difference between the first and second signals. The first signal may be representative of a current level of the first power unit during a first time interval and the first signal representative of a current level of the second power unit during a second time interval. The controller may further comprise output circuitry responsive to the output signal from the input circuitry to provide the out of phase drive signals to the first and second power unit.Type: ApplicationFiled: December 30, 2004Publication date: September 1, 2005Inventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20050174810Abstract: A power converter may include a transformer having a primary winding and a secondary winding. A first high side switch and a first low side switch may be coupled in series along a first path of a full bridge circuit, having a first node between the first high side switch and the first low side switch. The power converter may also comprise a second high side switch and a second low side switch coupled in series along a second path of the full bridge circuit, having a second node between the second high side switch and the second low side switch. The power converter may further comprise a first path capable of providing a first rectifier drive signal from the first node to a second rectifier switch, and a second path capable of providing a second rectifier drive signal from the second node to a first rectifier switch.Type: ApplicationFiled: December 30, 2004Publication date: August 11, 2005Inventors: Laszlo Lipcsei, Catalin Popovici
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Publication number: 20050174809Abstract: A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches responsive to at least one control signal to short both the primary and secondary winding during a first reset time interval. An electronic device including such a power converter and related methods are also provided. A power converter having a plurality of DC to DC converters coupled in parallel is also provided.Type: ApplicationFiled: February 10, 2004Publication date: August 11, 2005Inventors: Laszlo Lipcsei, Catalin Popovici