Patents by Inventor Siew Kuok Hoon
Siew Kuok Hoon 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: 11387659Abstract: Aspects of the present disclosure provide for a method. In at least some examples, the method includes controlling gate terminals of one or more transistors of a charger to operate the charger in a buck-boost mode of operation to generate a system voltage based on a bus voltage by performing power conversion through switching, determining that the bus voltage is greater in value than a voltage of a battery coupled to the charger, and controlling the gate terminals of the one or more transistors of the charger to operate the charger in a pass-through mode of operation to generate the system voltage based on the bus voltage without performing power conversion.Type: GrantFiled: June 25, 2019Date of Patent: July 12, 2022Assignee: Texas Instruments IncorporatedInventors: Yipeng Su, Qiong M. Li, Jing Ye, Siew Kuok Hoon
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Publication number: 20210336468Abstract: A device includes a battery current sense circuit configured to generate a battery current feedback voltage based on a current provided to a battery, a current regulation feedback loop configured to regulate the current provided to the battery based on the battery current feedback voltage and a configurable battery current reference voltage, and a precharge regulation feedback loop configured to regulate the current provided to the battery based on the battery current feedback voltage and a configurable precharge reference voltage. The device also includes a processor configured to set the battery current reference voltage to a first value and set the precharge current reference voltage to a second value. The first value is less than the second value during a transition state.Type: ApplicationFiled: July 2, 2021Publication date: October 28, 2021Inventors: Karthik NANDIMANDALAM VENKATA, Siew Kuok HOON, Daniel Andrew MAVENCAMP, Jairo Daniel OLIVARES
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Patent number: 11088559Abstract: A device includes a battery current sense circuit configured to generate a battery current feedback voltage based on a current provided to a battery, a current regulation feedback loop configured to regulate the current provided to the battery based on the battery current feedback voltage and a configurable battery current reference voltage, and a precharge regulation feedback loop configured to regulate the current provided to the battery based on the battery current feedback voltage and a configurable precharge reference voltage. The device also includes a processor configured to set the battery current reference voltage to a first value and set the precharge current reference voltage to a second value. The first value is less than the second value during a transition state.Type: GrantFiled: January 28, 2019Date of Patent: August 10, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Karthik Nandimandalam Venkata, Siew Kuok Hoon, Daniel Andrew Mavencamp, Jairo Daniel Olivares
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Patent number: 10778099Abstract: A device includes a power converter having an input coupled to a first node and an output coupled to an output terminal adapted to couple to a battery. A blocking transistor is coupled between a second node and the first node. A regulator has inputs coupled to the first node and the second node and an output coupled to a control node of the blocking transistor. The regulator is configured to control the blocking transistor to regulate a voltage drop across the blocking transistor based on a voltage between the first node and the second node. The regulator is also configured to turn off the blocking transistor in response to a voltage at the first node exceeding a voltage at the second node by at least a threshold to block boost-back current flowing from the output terminal to the second node.Type: GrantFiled: July 23, 2019Date of Patent: September 15, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Austin James Womac, Siew Kuok Hoon, Orlando Lazaro
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Publication number: 20190393702Abstract: Aspects of the present disclosure provide for a method. In at least some examples, the method includes controlling gate terminals of one or more transistors of a charger to operate the charger in a buck-boost mode of operation to generate a system voltage based on a bus voltage by performing power conversion through switching, determining that the bus voltage is greater in value than a voltage of a battery coupled to the charger, and controlling the gate terminals of the one or more transistors of the charger to operate the charger in a pass-through mode of operation to generate the system voltage based on the bus voltage without performing power conversion.Type: ApplicationFiled: June 25, 2019Publication date: December 26, 2019Inventors: Yipeng SU, Qiong M. LI, Jing YE, Siew Kuok HOON
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Publication number: 20190379228Abstract: A device includes a battery current sense circuit configured to generate a battery current feedback voltage based on a current provided to a battery, a current regulation feedback loop configured to regulate the current provided to the battery based on the battery current feedback voltage and a configurable battery current reference voltage, and a precharge regulation feedback loop configured to regulate the current provided to the battery based on the battery current feedback voltage and a configurable precharge reference voltage. The device also includes a processor configured to set the battery current reference voltage to a first value and set the precharge current reference voltage to a second value. The first value is less than the second value during a transition state.Type: ApplicationFiled: January 28, 2019Publication date: December 12, 2019Inventors: Karthik NANDIMANDALAM VENKATA, Siew Kuok HOON, Daniel Andrew MAVENCAMP, Jairo Daniel OLIVARES
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Patent number: 7928714Abstract: One embodiment of the invention includes a switching power supply system. The system includes a switch network comprising at least one switch configured to provide an output voltage based on switching activity thereof. The system also includes a switching controller configured to control the switch network to maintain the output voltage provided at an output based on a feedback signal associated with the output voltage. A converter pulse detector is configured to detect an output voltage overshoot condition based on the switching activity of the switch network corresponding to a transition in an output load to which the output voltage is provided.Type: GrantFiled: July 10, 2007Date of Patent: April 19, 2011Assignee: Texas Instruments IncorporatedInventors: Kae Ann Wong, David W. Evans, Joseph A. Nuniz, Norelis Medina, Siew Kuok Hoon, Wei-Chung Wu, Donald Thomas Pullen
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Publication number: 20090015227Abstract: One embodiment of the invention includes a switching power supply system. The system includes a switch network comprising at least one switch configured to provide an output voltage based on switching activity thereof. The system also includes a switching controller configured to control the switch network to maintain the output voltage provided at an output based on a feedback signal associated with the output voltage. A converter pulse detector is configured to detect an output voltage overshoot condition based on the switching activity of the switch network corresponding to a transition in an output load to which the output voltage is provided.Type: ApplicationFiled: July 10, 2007Publication date: January 15, 2009Inventors: Kae Ann Wong, David W. Evans, Joseph A. Nuniz, Norelis Medina, Siew Kuok Hoon, Wei-Chung Wu, Donald Thomas Pullen
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Patent number: 7400064Abstract: A switching regulation system and control scheme efficiently enables driving multiple loads from a common energy storage element, such as an inductor. The control scheme operates to store energy in the energy storage element over a first portion of a cycle, such as by ramping up current through an inductor, according to energy requirements of the multiple loads. After storing the energy in the storage element during the first portion of the cycle, the stored energy is delivered consecutively to each of the multiple loads over a subsequent portion of the cycle.Type: GrantFiled: April 22, 2005Date of Patent: July 15, 2008Assignee: Texas Instruments IncorporatedInventors: Siew Kuok Hoon, Norman L. Culp, Jun Chen, Franco Maloberti
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Patent number: 7230452Abstract: A driver circuit includes a first transistor coupled between an input supply node and an output node. The first transistor operates in one of a conductive state to couple the output node with the input supply node and non-conductive state according to cooperative operation of a second transistor and a third transistor. The second transistor is coupled to provide a control input to drive the first transistor to the conductive state thereof in response a first input signal provided at a control input of the second transistor. The third transistor is coupled to provide an output at the output node in response to a second input signal provided at a control input of the third transistor, the first and second input signals being out of phase with each other. Circuitry is coupled between the input supply node and the control input of the first transistor to provide reduced impedance at the control input of the first transistor according to operation of the second transistor.Type: GrantFiled: April 22, 2005Date of Patent: June 12, 2007Assignee: Texas Instruments IncorporatedInventors: Siew Kuok Hoon, Franco Maloberti, Jun Chen
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Patent number: 6844772Abstract: A threshold voltage extraction circuit. The circuit includes a first current mirror having a first transistor and a second transistor. A holding circuit has an output adapted to control a current though the first current mirror by operating to maintain substantially equal the voltages at a first input thereof and at a second input thereof. A third, MOS transistor having a source and a gate, and a resistor circuit, together adapted to generate a voltage which is a multiple of a source-gate threshold voltage of the third transistor, are coupled to the second transistor and to the first input of the holding circuit. A fourth, MOS transistor coupled to the first transistor and to the second input of the subtracting circuit through a second resistor circuit is adapted to generate a threshold voltage across the second resistor circuit, by the operation of the holding circuit.Type: GrantFiled: December 11, 2002Date of Patent: January 18, 2005Assignee: Texas Instruments IncorporatedInventors: Siew Kuok Hoon, Jun Chen
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Publication number: 20040113682Abstract: A threshold voltage extraction circuit. The circuit includes a first current mirror having a first transistor and a second transistor. A holding circuit has an output adapted to control a current though the first current mirror by operating to maintain substantially equal the voltages at a first input thereof and at a second input thereof. A third, MOS transistor having a source and a gate, and a resistor circuit, together adapted to generate a voltage which is a multiple of a source-gate threshold voltage of the third transistor, are coupled to the second transistor and to the first input of the holding circuit. A fourth, MOS transistor coupled to the first transistor and to the second input of the subtracting circuit through a second resistor circuit is adapted to generate a threshold voltage across the second resistor circuit, by the operation of the holding circuit.Type: ApplicationFiled: December 11, 2002Publication date: June 17, 2004Inventors: Siew Kuok Hoon, Jun Chen
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Patent number: 6690228Abstract: A bandgap reference circuit. The circuit includes a first current mirror having a first mirror transistor and a second mirror transistor. A holding circuit has an output adapted to control a current though the first current mirror by operating to maintain substantially equal the voltages at a first input thereof and at a second input thereof. A first bipolar transistor having an emitter, a base, and a collector, wherein the area of the emitter thereof has a predetermined size, is arranged to conduct a collector current from the first mirror transistor. A second bipolar transistor having an emitter, a base, and a collector, wherein the area of the emitter thereof has a size that is proportional to the size of the emitter area of the first bipolar transistor, is arranged to conduct a collector current from the second mirror transistor, the base thereof being connected to the collector thereof.Type: GrantFiled: December 11, 2002Date of Patent: February 10, 2004Assignee: Texas Instruments IncorporatedInventors: Jun Chen, Siew Kuok Hoon