Patents by Inventor Nenad Vukadinovic
Nenad Vukadinovic 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: 11979091Abstract: A forward converter includes an input voltage source divided into multiple divided input voltage sources, each of which provides a portion of a total input voltage of the input voltage source. The forward converter includes an output circuit with an output capacitor, a transformer having multiple primary windings, a secondary winding, and a relaxation winding. Each primary winding is connected in series with a corresponding primary side switching device. A combination of the primary winding and the corresponding primary side switching device is in parallel with a corresponding divided voltage source. The secondary winding outputs a voltage via the output circuit. The relaxation winding is connected across the divided input voltage sources or the output capacitor. A controller circuit controls the primary side switching devices to control power flow from the input voltage source to the output capacitor based on an indication of a voltage across the output capacitor.Type: GrantFiled: April 4, 2022Date of Patent: May 7, 2024Assignee: Appulse Power Inc.Inventors: Seyed-Behzad Mahdavikhah-Mehrabad, Nenad Vukadinovic
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Patent number: 11722055Abstract: The voltage stress is limited across switches in multi-level flying capacitor step-down dc-dc converters during a start-up sequence by a circuit. In one embodiment, the circuit includes a diode that is adapted to prevent reverse current flow during steady state operation, a pull-down switch and a commutation cell, which includes a start-up capacitor and a flying capacitor.Type: GrantFiled: May 3, 2019Date of Patent: August 8, 2023Assignee: Würth Elektronik eiSos GmbH & Co. KGInventors: Aleksandar Prodic, Michael Halamicek, Tom Moiannou, Nenad Vukadinovic, Alexander Gerfer, Mahmoud Shousha, Martin Haug
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Publication number: 20220231610Abstract: A forward converter includes an input voltage source divided into multiple divided input voltage sources, each of which provides a portion of a total input voltage of the input voltage source. The forward converter includes an output circuit with an output capacitor, a transformer having multiple primary windings, a secondary winding, and a relaxation winding. Each primary winding is connected in series with a corresponding primary side switching device. A combination of the primary winding and the corresponding primary side switching device is in parallel with a corresponding divided voltage source. The secondary winding outputs a voltage via the output circuit. The relaxation winding is connected across the divided input voltage sources or the output capacitor. A controller circuit controls the primary side switching devices to control power flow from the input voltage source to the output capacitor based on an indication of a voltage across the output capacitor.Type: ApplicationFiled: April 4, 2022Publication date: July 21, 2022Applicant: Appulse Power Inc.Inventors: Seyed-Behzad Mahdavikhah-Mehrabad, Nenad Vukadinovic
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Patent number: 11349405Abstract: A flyback converter includes a primary side circuit to receive an input voltage signal, a secondary side circuit to generate an output voltage signal using the input voltage signal, a synchronous rectifier switch, and a synchronous rectifier controller. The synchronous rectifier controller receives an attenuated drain-source voltage signal of the synchronous rectifier switch and the output voltage signal. The synchronous rectifier controller includes a threshold voltage generator to generate a first voltage signal using the output voltage signal, a first comparator to compare the attenuated drain-source voltage signal to the first voltage signal and, in response, generate a first comparison signal, and a second comparator to compare the attenuated drain-source voltage signal to a second voltage signal and, in response, generate a second comparison signal.Type: GrantFiled: July 10, 2020Date of Patent: May 31, 2022Assignee: Appulse Power Inc.Inventors: Aleksandar Radic, Nenad Vukadinovic
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Patent number: 11329567Abstract: A forward converter includes an input voltage source divided into multiple divided input voltage sources, each of which provides a portion of a total input voltage of the input voltage source. The forward converter includes an output circuit with an output capacitor, a transformer having multiple primary windings, a secondary winding, and a relaxation winding. Each primary winding is connected in series with a corresponding primary side switching device. A combination of the primary winding and the corresponding primary side switching device is in parallel with a corresponding divided voltage source. The secondary winding outputs a voltage via the output circuit. The relaxation winding is connected across the divided input voltage sources or the output capacitor. A controller circuit controls the primary side switching devices to control power flow from the input voltage source to the output capacitor based on an indication of a voltage across the output capacitor.Type: GrantFiled: April 15, 2020Date of Patent: May 10, 2022Assignee: Appulse Power Inc.Inventors: Seyed-Behzad Mahdavikhah-Mehrabad, Nenad Vukadinovic
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Publication number: 20210057999Abstract: Embodiments described herein introduce two sets of methods for limiting the voltage stress across switches in multi-level flying capacitor step-down de-de converters during the start-up sequence. Systems, devices, apparatuses, controllers, control methods, and processors are contemplated for an improved power converter topology. The embodiments are designed to aid in reducing the deficiencies noted in respect of ML-FCs, among others.Type: ApplicationFiled: May 3, 2019Publication date: February 25, 2021Inventors: Aleksandar PRODIC, Michael HALAMICEK, Tom MOIANNOU, Nenad VUKADINOVIC, Alexander GERFER, Mahmoud SHOUSHA, Martin HAUG
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Publication number: 20200343819Abstract: A flyback converter includes a primary side circuit to receive an input voltage signal, a secondary side circuit to generate an output voltage signal using the input voltage signal, a synchronous rectifier switch, and a synchronous rectifier controller. The synchronous rectifier controller receives an attenuated drain-source voltage signal of the synchronous rectifier switch and the output voltage signal. The synchronous rectifier controller includes a threshold voltage generator to generate a first voltage signal using the output voltage signal, a first comparator to compare the attenuated drain-source voltage signal to the first voltage signal and, in response, generate a first comparison signal, and a second comparator to compare the attenuated drain-source voltage signal to a second voltage signal and, in response, generate a second comparison signal.Type: ApplicationFiled: July 10, 2020Publication date: October 29, 2020Applicant: Appulse Power Inc.Inventors: Aleksandar Radic, Nenad Vukadinovic
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Patent number: 10756640Abstract: A flyback converter includes a primary side circuit to receive an input voltage signal, a secondary side circuit to generate an output voltage signal using the input voltage signal, a synchronous rectifier switch, and a synchronous rectifier controller. The synchronous rectifier controller receives an attenuated drain-source voltage signal of the synchronous rectifier switch and the output voltage signal. The synchronous rectifier controller includes a threshold voltage generator to generate a first voltage signal using the output voltage signal, a first comparator to compare the attenuated drain-source voltage signal to the first voltage signal and, in response, generate a first comparison signal, and a second comparator to compare the attenuated drain-source voltage signal to a second voltage signal and, in response, generate a second comparison signal.Type: GrantFiled: September 9, 2019Date of Patent: August 25, 2020Assignee: APPULSE POWER INC.Inventors: Aleksandar Radic, Nenad Vukadinovic
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Publication number: 20200244175Abstract: A forward converter includes an input voltage source divided into multiple divided input voltage sources, each of which provides a portion of a total input voltage of the input voltage source. The forward converter includes an output circuit with an output capacitor, a transformer having multiple primary windings, a secondary winding, and a relaxation winding. Each primary winding is connected in series with a corresponding primary side switching device. A combination of the primary winding and the corresponding primary side switching device is in parallel with a corresponding divided voltage source. The secondary winding outputs a voltage via the output circuit. The relaxation winding is connected across the divided input voltage sources or the output capacitor. A controller circuit controls the primary side switching devices to control power flow from the input voltage source to the output capacitor based on an indication of a voltage across the output capacitor.Type: ApplicationFiled: April 15, 2020Publication date: July 30, 2020Applicant: Silanna Asia Pte LtdInventors: Seyed-Behzad Mahdavikhah-Mehrabad, Nenad Vukadinovic
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Patent number: 10141832Abstract: In various embodiments described in the present disclosure, various methods and systems are introduced, that may reduce and/or eliminate the voltage spikes on the power switches by avoiding operation at zero-ripple duty ratios.Type: GrantFiled: July 11, 2016Date of Patent: November 27, 2018Assignee: Maxim Integrated Products, Inc.Inventors: Nenad Vukadinovic, Aleksandar Prodic, Cory Brent Arnold, Brett A. Miwa, Michael Warren Baker
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Publication number: 20180205307Abstract: In various embodiments described in the present disclosure, various methods and systems are introduced, that may reduce and/or eliminate the voltage spikes on the power switches by avoiding operation at zero-ripple duty ratios.Type: ApplicationFiled: July 11, 2016Publication date: July 19, 2018Inventors: Nenad Vukadinovic, Aleksandar Prodic, Cory Brent Arnold, Brett A. Miwa, Michael Warren Baker