Patents by Inventor Pranav Raval
Pranav Raval 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).
-
Publication number: 20220368622Abstract: Systems and methods for network optimization using end user telemetry are disclosed. In one embodiment, a method for optimizing incoming communication routing may include: (1) establishing, by a data center computer program executed by a data center computer processor, a data connection with an end user electronic device, the data connection using a first data communication route; (2) collecting, by the data center computer program, a metric for the data connection; (3) determining, by the data center computer program, that the metric is outside of an acceptable range; (4) determining, by the data center computer program, that a cause for the metric being outside of the acceptable range is external to the data center; and (5) re-routing, by the data center computer program, the data connection to a second data communication route.Type: ApplicationFiled: May 10, 2022Publication date: November 17, 2022Inventors: Nick ROSENBERG, Tony M. NAZAROWSKI, Emily FOSTER, Pranav RAVAL, John SMITH
-
Patent number: 10291125Abstract: Methods and apparatus for a DC-DC converter having input voltage feedforward for reducing the effects of input voltage signal transients. In embodiments, a feedback circuit receives an output voltage and generates a feedback signal and a modulation circuit receives the feedback signal and generates a control signal for a switching element for generating the output voltage, which is boosted from an input voltage. A feedforward module combines a slope compensation signal, the input voltage, and current information for an inductive energy storage element, which forms a boost circuit for generating the output voltage and generates a ramp signal to the modulation circuit. A duty cycle of the control signal is proportional to an impedance compensation input, inversely proportional to the slope compensation and the input voltage, and inversely proportional to the inductor current.Type: GrantFiled: September 18, 2018Date of Patent: May 14, 2019Assignee: Allegro MicroSystems, LLCInventors: Pranav Raval, Vijay Mangtani
-
Publication number: 20190020278Abstract: Methods and apparatus for a DC-DC converter having input voltage feedforward for reducing the effects of input voltage signal transients. In embodiments, a feedback circuit receives an output voltage and generates a feedback signal and a modulation circuit receives the feedback signal and generates a control signal for a switching element for generating the output voltage, which is boosted from an input voltage. A feedforward module combines a slope compensation signal, the input voltage, and current information for an inductive energy storage element, which forms a boost circuit for generating the output voltage and generates a ramp signal to the modulation circuit. A duty cycle of the control signal is proportional to an impedance compensation input, inversely proportional to the slope compensation and the input voltage, and inversely proportional to the inductor current.Type: ApplicationFiled: September 18, 2018Publication date: January 17, 2019Applicant: Allegro MicroSystems, LLCInventors: Pranav Raval, Vijay Mangtani
-
Patent number: 10110128Abstract: Methods and apparatus for a DC-DC converter having input voltage feedforward for reducing the effects of input voltage signal transients. In embodiments, a feedback circuit receives an output voltage and generates a feedback signal and a modulation circuit receives the feedback signal and generates a control signal for a switching element configured to generate the output voltage, which is boosted from an input voltage. A feedforward module combines the input voltage and current information for an inductive energy storage element, which forms a boost circuit for generating the output voltage, and provides a feedforward signal to the modulation circuit. The modulation circuit can generate the control signal from a ramp signal and the feedforward signal.Type: GrantFiled: March 8, 2017Date of Patent: October 23, 2018Assignee: Allegro MicroSystems, LLCInventors: Pranav Raval, Vijay Mangtani
-
Publication number: 20180262107Abstract: Methods and apparatus for a DC-DC converter having input voltage feedforward for reducing the effects of input voltage signal transients. In embodiments, a feedback circuit receives an output voltage and generates a feedback signal and a modulation circuit receives the feedback signal and generates a control signal for a switching element configured to generate the output voltage, which is boosted from an input voltage. A feedforward module combines the input voltage and current information for an inductive energy storage element, which forms a boost circuit for generating the output voltage, and provides a feedforward signal to the modulation circuit. The modulation circuit can generate the control signal from a ramp signal and the feedforward signal.Type: ApplicationFiled: March 8, 2017Publication date: September 13, 2018Applicant: Allegro MicroSystems, LLCInventors: Pranav Raval, Vijay Mangtani
-
Patent number: 9825528Abstract: In one aspect, an integrated circuit (IC) is configured to receive an input signal and includes a boost duty cycle control circuit configured to provide duty cycle control to a power conversion stage configured to drive a load. The power conversion stage is configured to receive an input voltage. The IC also includes a current control circuit configured to control current of a first current source coupled to the first load and an inverter configured to provide an output signal comprising a negative of the input voltage, the output of the inverter configured to be coupled to the boost duty cycle control circuit.Type: GrantFiled: December 28, 2015Date of Patent: November 21, 2017Assignee: Allegro Microsystems, LLCInventors: Nai-Chi Lee, Pranav Raval
-
Publication number: 20170187280Abstract: In one aspect, an integrated circuit (IC) is configured to receive an input signal and includes a boost duty cycle control circuit configured to provide duty cycle control to a power conversion stage configured to drive a load. The power conversion stage is configured to receive an input voltage. The IC also includes a current control circuit configured to control current of a first current source coupled to the first load and an inverter configured to provide an output signal comprising a negative of the input voltage, the output of the inverter configured to be coupled to the boost duty cycle control circuit.Type: ApplicationFiled: December 28, 2015Publication date: June 29, 2017Applicant: Allegro Microsystems, LLCInventors: Nai-Chi Lee, Pranav Raval
-
Patent number: 9642203Abstract: In one aspect, an integrated circuit (IC) is configured to receive an input signal. The IC includes a boost switch driver configured to provide a switching operation to a boost converter to drive a string of light emitting diodes (LEDs), a current sink driver connected to a current source and configured to provide a current signal to the string of LEDs, and a delay module configured to delay the current signal to the string of LEDs with respect to the input signal.Type: GrantFiled: June 7, 2016Date of Patent: May 2, 2017Assignee: Allegro Microsystems, LLCInventors: Nai-Chi Lee, Pranav Raval
-
Patent number: 9615413Abstract: An LED driver circuit selects a regulated voltage value for use in driving one or more LEDs based on dimming duty cycle. In some embodiments, the regulated voltage value may be selected in accordance with a function that decreases monotonically with increasing dimming duty cycle. In this manner, LED current accuracy can be achieved at lower dimming duty cycles, while still achieving enhanced operational efficiency at higher dimming duty cycles.Type: GrantFiled: August 29, 2013Date of Patent: April 4, 2017Assignee: Allegro Microsystems, LLCInventors: Pranav Raval, Bassem Alnahas, Nai-Chi Lee
-
Publication number: 20160366742Abstract: In one aspect, an integrated circuit (IC) is configured to receive an input signal. The IC includes a boost switch driver configured to provide a switching operation to a boost converter to drive a string of light emitting diodes (LEDs), a current sink driver connected to a current source and configured to provide a current signal to the string of LEDs, and a delay module configured to delay the current signal to the string of LEDs with respect to the input signal.Type: ApplicationFiled: June 7, 2016Publication date: December 15, 2016Applicant: Allegro Microsystems, LLCInventors: Nai-Chi Lee, Pranav Raval
-
Patent number: 9270171Abstract: Methods and apparatus for a circuit including a DC-DC converter including: a boost converter to provide a DC voltage output from a DC input voltage, the DC output voltage configured to connect with a first load terminal, a feedback module configured to connect with a second load terminal, a switching module having a switching element coupled to the boost converter, and a control circuit coupled to the switching module to control operation of the switching element, the control circuit coupled to the feedback module, wherein the control circuit includes a slope generator to generate a ramp signal having a slope that can vary cycle to cycle.Type: GrantFiled: March 15, 2013Date of Patent: February 23, 2016Assignee: ALLEGRO MICROSYSTEMS, LLCInventors: Pranav Raval, Gregory Szczeszynski, George Humphrey
-
Patent number: 9144126Abstract: An electronic circuit for driving a plurality of light emitting diode (LED) channels coupled to a common voltage node includes a priority queue for tracking a dominant LED channel. A queue manager may be provided to keep the priority queue updated during LED drive operations based on operating conditions associated with the LED channels.Type: GrantFiled: August 22, 2012Date of Patent: September 22, 2015Assignee: Allegro Microsystems, LLCInventors: Pranav Raval, Gregory Szczeszynski, David Toebes
-
Patent number: 8994279Abstract: Control circuits and techniques are provided for use with DC-DC converters. The circuits and techniques may, in some implementations, be used with LED driver systems. In some embodiments control circuits are provided that rely on multiple different feedback paths to adjust a duty cycle of a DC-DC converter. In some embodiments, control circuits are provided that switch between multiple capacitors to provide as duty cycle control signal for use with a DC-DC converter.Type: GrantFiled: January 29, 2013Date of Patent: March 31, 2015Assignee: Allegro Microsystems, LLCInventors: Pranav Raval, Gregory Szczeszynski, Bassem Alnahas, Nai-Chi Lee
-
Publication number: 20150061528Abstract: An LED driver circuit selects a regulated voltage value for use in driving one or more LEDs based on dimming duty cycle. In some embodiments, the regulated voltage value may be selected in accordance with a function that decreases monotonically with increasing dimming duty cycle. In this manner, LED current accuracy can be achieved at lower dimming duty cycles, while still achieving enhanced operational efficiency at higher dimming duty cycles.Type: ApplicationFiled: August 29, 2013Publication date: March 5, 2015Applicant: Allegro Microsystems, LLCInventors: Pranav Raval, Bassem Alnahas, Nai-Chi Lee
-
Patent number: 8957607Abstract: A control circuit used to control a DC-DC converter includes a duty cycle control unit to control a duty cycle of the DC-DC converter and a hysteretic control unit to maintain a voltage at an output of the DC-DC converter within a narrow range during certain operational time periods. The hysteretic control unit may maintain the converter output voltage within the range by alternately enabling and disabling the duty cycle control unit based on feedback from the DC-DC converter output. In at least one embodiment, the control circuit is used within LED driver circuitry for driving a plurality of LED channels.Type: GrantFiled: August 22, 2012Date of Patent: February 17, 2015Assignee: Allergo Microsystems, LLCInventors: Pranav Raval, Gregory Szczeszynski, Bassem Alnahas
-
Publication number: 20140210359Abstract: Control circuits and techniques are provided for use with DC-DC converters. The circuits and techniques may, in some implementations, be used with LED driver systems. In some embodiments control circuits are provided that rely on multiple different feedback paths to adjust a duty cycle of a DC-DC converter. In some embodiments, control circuits are provided that switch between multiple capacitors to provide as duty cycle control signal for use with a DC-DC converter.Type: ApplicationFiled: January 29, 2013Publication date: July 31, 2014Inventors: Pranav Raval, Gregory Szczeszynski, Bassem Alnahas, Nai-Chi Lee
-
Publication number: 20140055115Abstract: Methods and apparatus for a circuit including a DC-DC converter comprising: a boost converter to provide a DC voltage output from a DC input voltage, the DC output voltage configured to connect with a first load terminal, a feedback module configured to connect with a second load terminal, a switching module having a switching element coupled to the boost converter, and a control circuit coupled to the switching module to control operation of the switching element, the control circuit coupled to the feedback module, wherein the control circuit includes a slope generator to generate a ramp signal having a slope that can vary cycle to cycle.Type: ApplicationFiled: March 15, 2013Publication date: February 27, 2014Inventors: PRANAV RAVAL, Gregory Szczeszynski, George Humphrey
-
Publication number: 20140055045Abstract: A control circuit used to control a DC-DC converter includes a duty cycle control unit to control a duty cycle of the DC-DC converter and a hysteretic control unit to maintain a voltage at an output of the DC-DC converter within a narrow range during certain operational time periods. The hysteretic control unit may maintain the converter output voltage within the range by alternately enabling and disabling the duty cycle control unit based on feedback from the DC-DC converter output. In at least one embodiment, the control circuit is used within LED driver circuitry for driving a plurality of LED channels.Type: ApplicationFiled: August 22, 2012Publication date: February 27, 2014Applicant: Allegro Microsystems, Inc.Inventors: Pranav Raval, Gregory Szczeszynski, Bassem Alnahas
-
Publication number: 20140055051Abstract: An electronic circuit for driving a plurality of light emitting diode (LED) channels coupled to a common voltage node includes a priority queue for tracking a dominant LED channel. A queue manager may be provided to keep the priority queue updated during LED drive operations based on operating conditions associated with the LED channels.Type: ApplicationFiled: August 22, 2012Publication date: February 27, 2014Applicant: Allegro Microsystems, Inc.Inventors: Pranav Raval, Gregory Szczeszynski, David Toebes