Patents by Inventor Sanghwa Jung
Sanghwa Jung 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: 11923715Abstract: An apparatus is disclosed for adaptive multi-mode charging. In an example aspect, the apparatus includes at least one charger having a first node and a second node. The at least one charger is configured to accept an input voltage at the first node. The at least one charger is also configured to selectively operate in a first mode to generate a first output voltage at the second node that is greater than or less than the input voltage or operate in a second mode to generate a second output voltage at the second node that is substantially equal to the input voltage.Type: GrantFiled: June 26, 2020Date of Patent: March 5, 2024Assignee: QUALCOMM IncorporatedInventors: Chunping Song, Cheong Kun, Xiaolin Gao, Sanghwa Jung, Yue Jing
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Publication number: 20240055992Abstract: A three-level buck converter circuit configurable to transition between a three-level buck converter mode and a two-level buck converter mode and methods for regulating power using such a circuit. One example power supply circuit generally includes a three-level buck converter circuit and a control circuit coupled to the three-level buck converter circuit and configured to control operation of the three-level buck converter circuit between a three-level buck converter mode and a two-level buck converter mode. The three-level buck converter circuit generally includes a first switch, a second switch coupled to the first switch via a first node, a third switch coupled to the second switch via a second node, a fourth switch coupled to the third switch via a third node, a first capacitive element coupled between the first node and the third node, and an inductive element coupled between the second node and an output node.Type: ApplicationFiled: October 18, 2023Publication date: February 15, 2024Inventors: Sanghwa JUNG, Chunping SONG, Ta-Tung YEN, Yue JING
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Patent number: 11831241Abstract: A three-level buck converter circuit configurable to transition between a three-level buck converter mode and a two-level buck converter mode and methods for regulating power using such a circuit. One example power supply circuit generally includes a three-level buck converter circuit and a control circuit coupled to the three-level buck converter circuit and configured to control operation of the three-level buck converter circuit between a three-level buck converter mode and a two-level buck converter mode. The three-level buck converter circuit generally includes a first switch, a second switch coupled to the first switch via a first node, a third switch coupled to the second switch via a second node, a fourth switch coupled to the third switch via a third node, a first capacitive element coupled between the first node and the third node, and an inductive element coupled between the second node and an output node.Type: GrantFiled: June 30, 2021Date of Patent: November 28, 2023Assignee: QUALCOMM IncorporatedInventors: Sanghwa Jung, Chunping Song, Ta-Tung Yen, Yue Jing
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Patent number: 11705812Abstract: Techniques and apparatus for current-based transitioning between a buck converter mode and a charge pump mode in an adaptive combination power supply circuit. One example power supply circuit generally includes a switching regulator and control logic coupled to the switching regulator. The control logic is generally configured to compare an indication of a current associated with the switching regulator to a threshold and to control a transition of the switching regulator between a buck converter mode and a charge pump mode based on the comparison.Type: GrantFiled: March 29, 2021Date of Patent: July 18, 2023Assignee: QUALCOMM IncorporatedInventors: Ta-Tung Yen, Sanghwa Jung, Xiaolin Gao
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Publication number: 20230006555Abstract: A three-level buck converter circuit configurable to transition between a three-level buck converter mode and a two-level buck converter mode and methods for regulating power using such a circuit. One example power supply circuit generally includes a three-level buck converter circuit and a control circuit coupled to the three-level buck converter circuit and configured to control operation of the three-level buck converter circuit between a three-level buck converter mode and a two-level buck converter mode. The three-level buck converter circuit generally includes a first switch, a second switch coupled to the first switch via a first node, a third switch coupled to the second switch via a second node, a fourth switch coupled to the third switch via a third node, a first capacitive element coupled between the first node and the third node, and an inductive element coupled between the second node and an output node.Type: ApplicationFiled: June 30, 2021Publication date: January 5, 2023Inventors: Sanghwa JUNG, Chunping SONG, Ta-Tung YEN, Yue JING
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Patent number: 11527951Abstract: Certain aspects of the present disclosure generally relate to soft starting a switched-mode power supply (SMPS) circuit operating as a charge pump in a reverse multiply-by-two mode. One example SMPS circuit generally includes a plurality of transistors, a capacitive element coupled to the plurality of transistors, and a current sink coupled between the capacitive element and a reference potential node for the SMPS circuit. For certain aspects, the current sink is configured to be enabled during a first phase of a soft start operation for the SMPS circuit, but is configured to be disabled during a second phase of the soft start operation and during normal operation for the SMPS circuit.Type: GrantFiled: December 17, 2020Date of Patent: December 13, 2022Assignee: QUALCOMM IncorporatedInventors: Yue Jing, Sanghwa Jung, David Wong
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Patent number: 11522452Abstract: A method of operating a buck converter is disclosed. The buck converter includes a first capacitor, a second capacitor, and an inductor between a node and an output of the buck converter. The method includes, during a first portion of a cycle, coupling the first capacitor and the second capacitor in series between an input of the buck converter and a ground, wherein the first capacitor is coupled between the input of the buck converter and the node, and the second capacitor is coupled between the node and the ground. The method also includes, during a second portion of the cycle, coupling the second capacitor and the first capacitor in series between the input of the buck converter and the ground, wherein the second capacitor is coupled between the input of the buck converter and the node, and the first capacitor is coupled between the node and the ground.Type: GrantFiled: December 19, 2019Date of Patent: December 6, 2022Assignee: QUALCOMM INCORPORATEDInventors: Sanghwa Jung, Xiaolin Gao
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Publication number: 20220311339Abstract: Techniques and apparatus for current-based transitioning between a buck converter mode and a charge pump mode in an adaptive combination power supply circuit. One example power supply circuit generally includes a switching regulator and control logic coupled to the switching regulator. The control logic is generally configured to compare an indication of a current associated with the switching regulator to a threshold and to control a transition of the switching regulator between a buck converter mode and a charge pump mode based on the comparison.Type: ApplicationFiled: March 29, 2021Publication date: September 29, 2022Inventors: Ta-Tung YEN, Sanghwa JUNG, Xiaolin GAO
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Publication number: 20210194358Abstract: Certain aspects of the present disclosure generally relate to soft starting a switched-mode power supply (SMPS) circuit operating as a charge pump in a reverse multiply-by-two mode. One example SMPS circuit generally includes a plurality of transistors, a capacitive element coupled to the plurality of transistors, and a current sink coupled between the capacitive element and a reference potential node for the SMPS circuit. For certain aspects, the current sink is configured to be enabled during a first phase of a soft start operation for the SMPS circuit, but is configured to be disabled during a second phase of the soft start operation and during normal operation for the SMPS circuit.Type: ApplicationFiled: December 17, 2020Publication date: June 24, 2021Inventors: Yue JING, Sanghwa JUNG, David WONG
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Publication number: 20210194364Abstract: A method of operating a buck converter is disclosed. The buck converter includes a first capacitor, a second capacitor, and an inductor between a node and an output of the buck converter. The method includes, during a first portion of a cycle, coupling the first capacitor and the second capacitor in series between an input of the buck converter and a ground, wherein the first capacitor is coupled between the input of the buck converter and the node, and the second capacitor is coupled between the node and the ground. The method also includes, during a second portion of the cycle, coupling the second capacitor and the first capacitor in series between the input of the buck converter and the ground, wherein the second capacitor is coupled between the input of the buck converter and the node, and the first capacitor is coupled between the node and the ground.Type: ApplicationFiled: December 19, 2019Publication date: June 24, 2021Inventors: Sanghwa JUNG, Xiaolin GAO
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Publication number: 20210194266Abstract: An apparatus is disclosed for adaptive multi-mode charging. In an example aspect, the apparatus includes at least one charger having a first node and a second node. The at least one charger is configured to accept an input voltage at the first node. The at least one charger is also configured to selectively operate in a first mode to generate a first output voltage at the second node that is greater than or less than the input voltage or operate in a second mode to generate a second output voltage at the second node that is substantially equal to the input voltage.Type: ApplicationFiled: June 26, 2020Publication date: June 24, 2021Inventors: Chunping Song, Cheong Kun, Xiaolin Gao, Sanghwa Jung, Yue Jing
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Publication number: 20210067041Abstract: An apparatus for generating an output voltage across a load. The apparatus includes a first switching device; a second switching device coupled in series with the first switching device between an upper voltage rail and a lower voltage rail, wherein the upper voltage rail is configured to receive an input voltage; an inductor between a node between the first and second switching device and the load; a sensor configured to generate a control signal related to a current through the inductor; and a controller configured to operate the first and second switching devices to generate the output voltage based on the control signal.Type: ApplicationFiled: June 5, 2020Publication date: March 4, 2021Inventors: Kunhee CHO, Sanghwa JUNG, Zhaohui ZHU, Chunping SONG
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Publication number: 20210067033Abstract: Techniques and apparatus for sensing and/or maintaining a differential voltage across a flying capacitor in a switched-mode power supply circuit (SMPS) when operating in certain modes (e.g., full duty mode). One example power supply circuit generally includes a first transistor, a second transistor coupled to the first transistor via a first node, a third transistor coupled to the second transistor via a second node, a fourth transistor coupled to the third transistor via a third node, a first capacitive element having a first terminal coupled to the first node and having a second terminal coupled to the third node, and a voltage control circuit coupled to the first capacitive element and configured to maintain a defined voltage across the first capacitive element. The power supply circuit may further include a switched-capacitor circuit coupled to the first capacitive element and configured to sense a differential voltage across the first capacitive element.Type: ApplicationFiled: August 28, 2020Publication date: March 4, 2021Inventors: Yue JING, Sanghwa JUNG
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Patent number: 10389163Abstract: Enhanced reverse boosting detection in a wireless charging scheme is disclosed. In some implementations, a minimum mid-level input voltage regulation (VMID_MIN regulation) loop is provided to regulate an input voltage from a wirelessly coupled power source when a mid-level of the input voltage falls below a predetermined threshold. The input voltage is provided to a buck converter within a wireless charging receiver. An input missing poller signal generator is provided to generate an input missing poller (IMP) signal if the VMID_MIN regulation loop becomes active and the buck converter has entered a discontinuous mode.Type: GrantFiled: October 20, 2017Date of Patent: August 20, 2019Assignee: QUALCOMM IncorporatedInventors: David Wong, Neal Horovitz, Ta-Tung Yen, Sanghwa Jung, Cheong Kun, Kin Siu Fung
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Publication number: 20190120905Abstract: Enhanced reverse boosting detection in a wireless charging scheme is disclosed. In some implementations, a minimum mid-level input voltage regulation (VMID_MIN regulation) loop is provided to regulate an input voltage from a wirelessly coupled power source when a mid-level of the input voltage falls below a predetermined threshold. The input voltage is provided to a buck converter within a wireless charging receiver. An input missing poller signal generator is provided to generate an input missing poller (IMP) signal if the VMID_MIN regulation loop becomes active and the buck converter has entered a discontinuous mode.Type: ApplicationFiled: October 20, 2017Publication date: April 25, 2019Inventors: David WONG, Neal HOROVITZ, Ta-Tung YEN, Sanghwa JUNG, Cheong KUN, Kin Siu FUNG
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Patent number: 7420412Abstract: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.Type: GrantFiled: September 19, 2007Date of Patent: September 2, 2008Inventors: Junghyun Kim, Daehee Lee, Sanghwa Jung, Youngwoo Kwon, Moon-Seok Jeon
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Patent number: 7394313Abstract: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.Type: GrantFiled: September 19, 2007Date of Patent: July 1, 2008Inventors: Junghyun Kim, Daehee Lee, Sanghwa Jung, Youngwoo Kwon, Moon-Seok Jeon
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Patent number: 7388427Abstract: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.Type: GrantFiled: September 19, 2007Date of Patent: June 17, 2008Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Junghyun Kim, Daehee Lee, Sanghwa Jung, Youngwoo Kwon, Moon-Seok Jeon
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Patent number: 7348841Abstract: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.Type: GrantFiled: September 19, 2007Date of Patent: March 25, 2008Inventors: Junghyun Kim, Daehee Lee, Sanghwa Jung, Youngwoo Kwon, Moon-Seok Jeon
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Publication number: 20080012635Abstract: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.Type: ApplicationFiled: September 19, 2007Publication date: January 17, 2008Applicant: Wavies, Inc.Inventors: Junghyun Kim, Daehee Lee, Sanghwa Jung, Youngwoo Kwon, Moon-Seok Jeon