Patents by Inventor SANJAY GURLAHOSUR
SANJAY GURLAHOSUR 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: 11545939Abstract: Methods, apparatus, and systems are disclosed that adjust transient response in a multistage system. An example apparatus includes a first filter including an input configured to be coupled to an output of a master stage, an amplifier, the first input of the amplifier coupled to the input of the first filter, the second input of the amplifier coupled to the output of the first filter, a second filter, the input of the second filter coupled to the output of the amplifier, and a comparator, the first input of the comparator coupled to the input of the first filter circuit, the second input of the comparator coupled to the output of the amplifier, the third input of the comparator coupled to the output of the second filter, and the output of the comparator adapted to be coupled to a latch.Type: GrantFiled: December 31, 2019Date of Patent: January 3, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sanjay Gurlahosur, Karen Chan
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Patent number: 11309721Abstract: A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.Type: GrantFiled: April 23, 2019Date of Patent: April 19, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Sanjay Gurlahosur
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Patent number: 11196286Abstract: The present disclosure relates to communicating fault event information between power supply devices. In an example, a fault event communication system can include a comparator that can be coupled to a node that can have a shared bus voltage established by current sharing circuitry. The comparator can compare the shared bus voltage to a reference voltage and output a fault alert signal based on the comparison to alert a respective power supply device that another power supply device is experiencing a fault event. The system can include logic circuitry that can initiate a timer for a time interval in response to receiving the fault alert signal. The logic circuitry can determine a type of fault event at the respective power supply device based on the fault alert signal and duration of time that has elapsed since initiating the timer.Type: GrantFiled: August 28, 2019Date of Patent: December 7, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Sanjay Gurlahosur
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Publication number: 20200266769Abstract: Methods, apparatus, and systems are disclosed that adjust transient response in a multistage system. An example apparatus includes a first filter including an input configured to be coupled to an output of a master stage, an amplifier, the first input of the amplifier coupled to the input of the first filter, the second input of the amplifier coupled to the output of the first filter, a second filter, the input of the second filter coupled to the output of the amplifier, and a comparator, the first input of the comparator coupled to the input of the first filter circuit, the second input of the comparator coupled to the output of the amplifier, the third input of the comparator coupled to the output of the second filter, and the output of the comparator adapted to be coupled to a latch.Type: ApplicationFiled: December 31, 2019Publication date: August 20, 2020Inventors: Sanjay Gurlahosur, Karen Chan
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Publication number: 20200266657Abstract: The present disclosure relates to communicating fault event information between power supply devices. In an example, a fault event communication system can include a comparator that can be coupled to a node that can have a shared bus voltage established by current sharing circuitry. The comparator can compare the shared bus voltage to a reference voltage and output a fault alert signal based on the comparison to alert a respective power supply device that another power supply device is experiencing a fault event. The system can include logic circuitry that can initiate a timer for a time interval in response to receiving the fault alert signal. The logic circuitry can determine a type of fault event at the respective power supply device based on the fault alert signal and duration of time that has elapsed since initiating the timer.Type: ApplicationFiled: August 28, 2019Publication date: August 20, 2020Inventor: SANJAY GURLAHOSUR
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Patent number: 10511226Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to regulate a switched mode power supply. An example power converter includes a first comparator, a ramp generator coupled to a first input of the first comparator, and a current balance circuit coupled to the ramp generator, the current balance circuit including a transistor including a first current terminal, a second current terminal, and a gate, a multiplier circuit coupled to the first current terminal, a second comparator coupled to the gate, a first current source coupled to the first current terminal and the multiplier circuit, and a second current source coupled to the second current terminal and the second comparator.Type: GrantFiled: March 13, 2019Date of Patent: December 17, 2019Assignee: Texas Instruments IncorporatedInventors: Sanjay Gurlahosur, Karen Huimun Chan
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Patent number: 10476266Abstract: A power controller that includes first and second buck controllers and a power balancer. The first buck controller is configured to receive a first power rail at a first voltage and generate a first output signal. The second buck controller is configured to receive a second power rail at a second voltage and generate a second output signal. The power balancer is configured to receive an average current for the output signals and generate, based on the average current, a reference voltage to be received by the second buck controller. The output signals are combined to create a output power rail such that the first buck controller functions as a voltage source for the output power rail and the second buck controller controls, based on the reference voltage, an amount of current in the output power rail received from each of the buck controllers.Type: GrantFiled: March 30, 2015Date of Patent: November 12, 2019Assignee: Texas Instruments IncorporatedInventors: Sanjay Gurlahosur, Rajdeep Mukhopadhyay
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Patent number: 10454373Abstract: A multi-phase buck voltage regulator includes first and second buck converters, first and second low pass filters, and a current balancing loop circuit. The first buck converter includes a first pair of power transistors and a first switch node. The second buck converter includes a second pair of power transistors and a second switch node. The low pass filters are coupled to their respective switch nodes. The current balancing loop circuit receives a filtered output of each filter. The current balancing loop generates a current balancing current signal to control a gain of a first voltage-to-current converter for the second buck converter. The duty cycle of the second buck converter is thereby adjusted, which in turn adjusts a current of the second buck converter to become closer to a current of the first buck converter.Type: GrantFiled: November 13, 2017Date of Patent: October 22, 2019Assignee: Texas Instruments IncorporatedInventor: Sanjay Gurlahosur
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Publication number: 20190252893Abstract: A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.Type: ApplicationFiled: April 23, 2019Publication date: August 15, 2019Inventor: Sanjay Gurlahosur
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Patent number: 10312703Abstract: A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.Type: GrantFiled: November 2, 2015Date of Patent: June 4, 2019Assignee: Texas Instruments IncorporatedInventor: Sanjay Gurlahosur
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Publication number: 20190149047Abstract: A multi-phase buck voltage regulator includes first and second buck converters, first and second low pass filters, and a current balancing loop circuit. The first buck converter includes a first pair of power transistors and a first switch node. The second buck converter includes a second pair of power transistors and a second switch node. The low pass filters are coupled to their respective switch nodes. The current balancing loop circuit receives a filtered output of each filter. The current balancing loop generates a current balancing current signal to control a gain of a first voltage-to-current converter for the second buck converter. The duty cycle of the second buck converter is thereby adjusted, which in turn adjusts a current of the second buck converter to become closer to a current of the first buck converter.Type: ApplicationFiled: November 13, 2017Publication date: May 16, 2019Inventor: Sanjay GURLAHOSUR
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Publication number: 20160118822Abstract: A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.Type: ApplicationFiled: November 2, 2015Publication date: April 28, 2016Inventor: Sanjay Gurlahosur
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Patent number: 9178407Abstract: A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.Type: GrantFiled: August 17, 2011Date of Patent: November 3, 2015Assignee: NATIONAL SEMICONDUCTOR CORPORATIONInventor: Sanjay Gurlahosur
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Publication number: 20150288178Abstract: A power controller that includes first and second buck controllers and a power balancer. The first buck controller is configured to receive a first power rail at a first voltage and generate a first output signal. The second buck controller is configured to receive a second power rail at a second voltage and generate a second output signal. The power balancer is configured to receive an average current for the output signals and generate, based on the average current, a reference voltage to be received by the second buck controller. The output signals are combined to create a output power rail such that the first buck controller functions as a voltage source for the output power rail and the second buck controller controls, based on the reference voltage, an amount of current in the output power rail received from each of the buck controllers.Type: ApplicationFiled: March 30, 2015Publication date: October 8, 2015Inventors: Sanjay Gurlahosur, Rajdeep Mukhopadhyay
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Patent number: 9018921Abstract: A control circuit for use in a battery charger circuit that includes a switching voltage regulator, with the control circuit having a constant current charging mode and a constant voltage charging mode. A switcher controller is provided which configured to control a state of a top side switching transistor and a low side transistor of the switching voltage regulator in response to at least one error signal. A power path transistor switch is disposed intermediate an output of the switching voltage regulator and a first node for receiving a first terminal of a battery to be charged.Type: GrantFiled: August 17, 2011Date of Patent: April 28, 2015Assignee: National Semiconductor CorporationInventor: Sanjay Gurlahosur
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Publication number: 20130043828Abstract: A control circuit for use in a battery charger circuit that includes a switching voltage regulator, with the control circuit having a constant current charging mode and a constant voltage charging mode. A switcher controller is provided which configured to control a state of a top side switching transistor and a low side transistor of the switching voltage regulator in response to at least one error signal. A power path transistor switch is disposed intermediate an output of the switching voltage regulator and a first node for receiving a first terminal of a battery to be charged.Type: ApplicationFiled: August 17, 2011Publication date: February 21, 2013Applicant: National Semiconductor CorporationInventor: SANJAY GURLAHOSUR
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Publication number: 20130043829Abstract: A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.Type: ApplicationFiled: August 17, 2011Publication date: February 21, 2013Applicant: National Semiconductor CorporationInventor: SANJAY GURLAHOSUR