Patents by Inventor Pradeep S. Shenoy
Pradeep S. Shenoy 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: 11211865Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.Type: GrantFiled: February 24, 2020Date of Patent: December 28, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Joseph Maurice Khayat, Sergio Carlo-Rodriquez, Michael G. Amaro, Ramanathan Ramani, Pradeep S. Shenoy
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Patent number: 10693371Abstract: A method includes monitoring a resonant interval across a switching node. The method also includes detecting one or more preset values associated with the resonant interval across the switching node. The method further includes, in response to detecting the one or more preset values associated with the resonant interval across the switching node, initiating a high switch into an “on” operation.Type: GrantFiled: July 31, 2014Date of Patent: June 23, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Pradeep S. Shenoy
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Publication number: 20200195143Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.Type: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Inventors: Joseph Maurice Khayat, Sergio Carlo-Rodriquez, Michael G. Amaro, Ramanathan Ramani, Pradeep S. Shenoy
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Patent number: 10615692Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.Type: GrantFiled: June 27, 2014Date of Patent: April 7, 2020Assignee: Texas Instruments IncorporatedInventors: Joseph Maurice Khayat, Sergio Carlo-Rodriquez, Michael G. Amaro, Ramanathan Ramani, Pradeep S. Shenoy
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Patent number: 10033276Abstract: A DC-to-DC power converter includes a power stage, an output stage and a ripple magnitude detector. The power stage includes a plurality of transistors, an energy transfer capacitor coupled between at least two of the transistors, and a switch node. The output stage includes an inductor coupled between switch node and a voltage output. The ripple magnitude detector detects a magnitude of a change in voltage across the energy transfer capacitor and determines an amount of current though the inductor based on the magnitude of the change in voltage across the energy transfer capacitor.Type: GrantFiled: March 3, 2016Date of Patent: July 24, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Pradeep S. Shenoy
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Patent number: 9583939Abstract: A solar power system is provided for maximizing solar power conversion. The solar power system includes n power units connected in series and n?1 DC-DC converting units, and each of the n?1 DC-DC converting units is coupled to at least one of n solar power units. Each of the n?1 DC-DC converting units is configured to control the correspondingly connected solar power units to operate at a target current generation. The solar power system further includes a controlling unit coupled to the n?1 DC-DC converting units. The controlling unit monitors and compares the n currents generated by the n solar power units. Based on the current comparison, the controlling unit determines a series current and controls the n solar power units so that each of the generated photovoltaic currents is substantially equal to the determined series current.Type: GrantFiled: July 19, 2013Date of Patent: February 28, 2017Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOISInventors: Pradeep S. Shenoy, Phillip T. Krein
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Patent number: 9548648Abstract: A power converter includes at least a first phase including a high-side MOSFET transistor (HSA) and a low-side (LS) MOSFET transistor (LSA) driving a first output inductor. The first phase further includes an active gate drive assist circuit including first MOSFET switch (first switch) and second MOSFET switch (second switch) positioned in series between a source of HSA and a drain of LSA. A capacitor (CS) is between the source of HSA and drain of LSA. A bootstrap capacitor (CA) having a reference terminal is connected to a node between the first switch and the second switch.Type: GrantFiled: June 27, 2014Date of Patent: January 17, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael G. Amaro, Joseph Maurice Khayat, Pradeep S. Shenoy
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Publication number: 20160261190Abstract: A DC-to-DC power converter includes a power stage, an output stage and a ripple magnitude detector. The power stage includes a plurality of transistors, an energy transfer capacitor coupled between at least two of the transistors, and a switch node. The output stage includes an inductor coupled between switch node and a voltage output. The ripple magnitude detector detects a magnitude of a change in voltage across the energy transfer capacitor and determines an amount of current though the inductor based on the magnitude of the change in voltage across the energy transfer capacitor.Type: ApplicationFiled: March 3, 2016Publication date: September 8, 2016Inventor: Pradeep S. Shenoy
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Publication number: 20160173029Abstract: A method for determining a photovoltaic (PV) current from each of a plurality of PV elements arranged in a differential network is provided. The differential network is controlled with a plurality of control signals, where the differential network includes a plurality of inductors, and each control signal has a duty cycle. A plurality of controller parameters is received from the plurality of differential controllers. The PV current for each of the plurality of PV elements is calculated from the plurality of inductor currents and the duty cycle for each control signal.Type: ApplicationFiled: February 22, 2016Publication date: June 16, 2016Inventor: Pradeep S. Shenoy
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Patent number: 9270226Abstract: A method for determining a photovoltaic (PV) current from each of a plurality of PV elements arranged in a differential network is provided. The differential network is controlled with a plurality of control signals, where the differential network includes a plurality of inductors, and each control signal has a duty cycle. A plurality of controller parameters is received from the plurality of differential controllers. The PV current for each of the plurality of PV elements is calculated from the plurality of inductor currents and the duty cycle for each control signal.Type: GrantFiled: September 4, 2012Date of Patent: February 23, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Pradeep S. Shenoy
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Publication number: 20160036312Abstract: A method includes monitoring a resonant interval across a switching node. The method also includes detecting one or more preset values associated with the resonant interval across the switching node. The method further includes, in response to detecting the one or more preset values associated with the resonant interval across the switching node, initiating a high switch into an “on” operation.Type: ApplicationFiled: July 31, 2014Publication date: February 4, 2016Inventor: Pradeep S. Shenoy
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Publication number: 20150311793Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.Type: ApplicationFiled: June 27, 2014Publication date: October 29, 2015Inventors: JOSEPH MAURICE KHAYAT, SERGIO CARLO-RODRIQUEZ, MICHAEL G. AMARO, RAMANATHAN RAMANI, PRADEEP S. SHENOY
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Publication number: 20150311792Abstract: A power converter includes at least a first phase including a high-side MOSFET transistor (HSA) and a low-side (LS) MOSFET transistor (LSA) driving a first output inductor. The first phase further includes an active gate drive assist circuit including first MOSFET switch (first switch) and second MOSFET switch (second switch) positioned in series between a source of HSA and a drain of LSA. A capacitor (CS) is between the source of HSA and drain of LSA. A bootstrap capacitor (CA) having a reference terminal is connected to a node between the first switch and the second switch.Type: ApplicationFiled: June 27, 2014Publication date: October 29, 2015Inventors: MICHAEL G. AMARO, JOSEPH MAURICE KHAYAT, PRADEEP S. SHENOY
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Publication number: 20150207400Abstract: Integrated circuit apparatus and processes are presented for controlling a plurality of parallel-connected DC-DC converter phases forming a multiphase DC-DC conversion system in which individual converter phases are successively activated or deactivated for increasing and decreasing load conditions, respectively, according to an ordered phase sequence, and the phase sequence is selectively modified to promote thermal balancing of the DC-DC converter phases.Type: ApplicationFiled: January 21, 2014Publication date: July 23, 2015Applicant: Texas Instruments IncorporatedInventors: Pradeep S. Shenoy, Michael DiRenzo
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Publication number: 20150002115Abstract: A series-capacitor adaptively switched power conversion system includes, for example, a series-capacitor buck converter overlapping controller. The series-capacitor buck converter overlapping controller is arranged to provide reduced switching losses and improved system efficiency while the switched power conversion system is operating in a discontinuous conduction mode (DCM). While operating in the DCM, the series-capacitor buck converter overlapping controller generates precisely controlled frequency modulated waveforms that are adapted to independently drive control switches of one or more power converters. The series-capacitor buck converter overlapping controller is arranged to reduce (or eliminate) negative inductor current (and the associated conduction loss) that can be present in multiphase (two or more phases) series-capacitor buck converters.Type: ApplicationFiled: June 30, 2014Publication date: January 1, 2015Inventors: Pradeep S. Shenoy, Michael G. Amaro
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Publication number: 20140067298Abstract: A method for determining a photovoltaic (PV) current from each of a plurality of PV elements arranged in a differential network is provided. The differential network is controlled with a plurality of control signals, where the differential network includes a plurality of inductors, and each control signal has a duty cycle. A plurality of controller parameters is received from the plurality of differential controllers. The PV current for each of the plurality of PV elements is calculated from the plurality of inductor currents and the duty cycle for each control signal.Type: ApplicationFiled: September 4, 2012Publication date: March 6, 2014Applicant: Texas Instruments IncorporatedInventor: Pradeep S. Shenoy
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Publication number: 20130307341Abstract: A solar power system is provided for maximizing solar power conversion. The solar power system includes n power units connected in series and n?1 DC-DC converting units, and each of the n?1 DC-DC converting units is coupled to at least one of n solar power units. Each of the n?1 DC-DC converting units is configured to control the correspondingly connected solar power units to operate at a target current generation. The solar power system further includes a controlling unit coupled to the n?1 DC-DC converting units. The controlling unit monitors and compares the n currents generated by the n solar power units. Based on the current comparison, the controlling unit determines a series current and controls the n solar power units so that each of the generated photovoltaic currents is substantially equal to the determined series current.Type: ApplicationFiled: July 19, 2013Publication date: November 21, 2013Inventors: Pradeep S. Shenoy, Phillip T. Krein
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Patent number: 8508074Abstract: A solar power system is provided for maximizing solar power conversion. The solar power system includes n power units connected in series and n-1 DC-DC converting units, and each of the n-1 DC-DC converting units is coupled to at least one of n solar power units. Each of the n-1 DC-DC converting units is configured to control the correspondingly connected solar power units to operate at a target current generation. The solar power system further includes a controlling unit coupled to the n-1 DC-DC converting units. The controlling unit monitors and compares the n currents generated by the n solar power units. Based on the current comparison, the controlling unit determines a series current and controls the n solar power units so that each of the generated photovoltaic currents is substantially equal to the determined series current.Type: GrantFiled: December 29, 2011Date of Patent: August 13, 2013Assignee: The Board of Trustees of the University of IllinoisInventors: Pradeep S. Shenoy, Philip T. Krein