Patents by Inventor Sungmin YOO

Sungmin YOO 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: 20250221056
    Abstract: A device includes: a plurality of first transistors included in a first current path, in a normal mode, between a first power node to which a positive supply voltage is configured to be applied and a second power node to which a negative supply voltage is configured to be applied; and a first protection transistor connected to a first node which two of the plurality of first transistors are connected to, wherein the first protection transistor is configured to be turned off in the normal mode and to be turned on to provide a protection voltage to the first node in a power down mode.
    Type: Application
    Filed: December 19, 2024
    Publication date: July 3, 2025
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Himchan PARK, Jooseong Kim, Junhyeok Yang, Sungmin Yoo, Haejung Choi
  • Patent number: 12334823
    Abstract: A DC-DC buck converter for generating an output voltage by stepping down an input voltage includes a converting circuit including a plurality of transistors, a first capacitor, a second capacitor, and an inductor, the converting circuit being configured to form a current path that varies according to a plurality of modes and a plurality of phases; and a control circuit configured to: determine a mode of the converting circuit, from among the plurality of modes, according to a first amplitude of the input voltage and a second amplitude of the output voltage, and determine an ON/OFF state of each transistor of the plurality of transistors according to the determined mode and a phase from among the plurality of phases.
    Type: Grant
    Filed: May 31, 2022
    Date of Patent: June 17, 2025
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Sungmin Yoo, Hyungmin Lee, Woojoong Jung, Taehwang Kong, Junhyeok Yang, Yunho Lee
  • Patent number: 12283884
    Abstract: The present disclosure refers to direct current-to-direct current (DC-DC) converters and power supplies including the same. In an embodiment, a DC-DC converter includes a first switching circuit, a second switching circuit, a fourth capacitor coupled to a second node, and an inductor-capacitor (LC) filter coupled to a third node. The first switching circuit includes a first transistor coupled between a first capacitor and an input node, a second transistor coupled between the first capacitor and a second capacitor, a third transistor coupled between a first node and a third capacitor, and a fourth transistor coupled between the third capacitor and a ground node. The second switching circuit includes a fifth transistor coupled between the second capacitor and the third capacitor, a sixth transistor and a seventh transistor coupled between the first capacitor and the third capacitor, and an eighth transistor coupled between the first capacitor and the ground node.
    Type: Grant
    Filed: November 23, 2022
    Date of Patent: April 22, 2025
    Assignees: SAMSUNG ELECTRONICS CO., LTD., Korea University Research and Business Foundation
    Inventors: Sungmin Yoo, Minsu Kim, Hyungmin Lee, Taehwang Kong, Junhyeok Yang, Woojoong Jung
  • Publication number: 20250125724
    Abstract: Provided is a hybrid buck converter including a first PMOS transistor and a second PMOS transistor electrically connecting a power supply voltage node with a first switching node, a first NMOS transistor and a second NMOS transistor electrically connecting a ground node with the first switching node, an inductor electrically connecting the first switching node with a second switching node, a third NMOS transistor electrically connecting the second switching node with a first output node, a third PMOS transistor electrically connecting the second switching node with a second output node, a shunt regulator that is driven based on a second output voltage of the second output node, a first PWM controller adjusting, based on a pulse width control of first PMOS transistor and first NMOS transistor, a magnitude of an inductor current, and a second PWM controller adjusting, based on a pulse width control of first PMOS transistor and first NMOS transistor, a magnitude of the second output voltage.
    Type: Application
    Filed: October 8, 2024
    Publication date: April 17, 2025
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Doojin Jang, Hyunsik Kim, Junhyeok Yang, Sungmin Yoo, Honghyun Bae
  • Patent number: 12212242
    Abstract: A direct-current (DC)-DC converter includes a converting circuit including an inductor element. The converting circuit is configured to generate an output voltage from an input voltage based on a switching operation. An inductor current emulator is configured to adjust at least one parameter for changing a current peak value of the inductor element in response to a change in a level of the input voltage and is configured to generate an internal voltage based on the at least one parameter, which is adjusted. The inductor current emulator is configured to generate a control signal for controlling the switching operation such that current of the inductor element has a pattern corresponding to a pattern of the internal voltage.
    Type: Grant
    Filed: September 18, 2023
    Date of Patent: January 28, 2025
    Assignees: Samsung Electronics Co., Ltd., Korean University Research and Business Foundation
    Inventors: Sungmin Yoo, Taehwang Kong, Sangho Kim, Junhyeok Yang, Hyungmin Lee, Yunho Lee, Woojoong Jung
  • Publication number: 20250021122
    Abstract: A semiconductor device including a bandgap reference generator that generates a reference voltage; a switch control voltage generator that generates a first reference current based on the reference voltage, and generates an adaptive switch level voltage by distributing the first reference current to a first path and a second path, the first path including a first resistor, and the second path including a second resistor and a first bipolar junction transistor connected in series; and a switch controller that generates a switch control signal for controlling switches included in the bandgap reference generator based on the adaptive switch level voltage. The adaptive switch level voltage has a slope with respect to temperature that is greater than a base-emitter voltage of the first bipolar junction transistor.
    Type: Application
    Filed: January 15, 2024
    Publication date: January 16, 2025
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Haejung CHOI, Jooseong KIM, Junhyeok YANG, Sungmin YOO
  • Patent number: 12117472
    Abstract: An oscillation detector includes an amplitude variation detection circuit configured to generate a first pulse signal by comparing levels of voltages with each other, a frequency variation detection circuit configured to generate a second pulse signal by filtering the first pulse signal and allowing to pass a frequency component that is less than or equal to a certain frequency among frequency components of the first pulse signal, and a time variation detection circuit configured to output an oscillation detection signal when the second pulse signal has consecutive pulses for a period of time.
    Type: Grant
    Filed: July 26, 2022
    Date of Patent: October 15, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jaeseung Lee, Sungmin Yoo, Taehwang Kong, Junhyeok Yang
  • Publication number: 20240336797
    Abstract: A quantum dot composition including quantum dots, a photopolymerizable monomer, and an oligomer, wherein the oligomer includes a compound containing a carbon-carbon double bond and a compound containing a thiol group.
    Type: Application
    Filed: March 28, 2024
    Publication date: October 10, 2024
    Inventors: Sungjun KOH, Daehee LEE, Ilju MUN, Kyoungmo NAM, Hyunjin KANG, Gilran KIM, Sungmin YOO, Wonseok YU, Mihee YUN, Euyjin LEE
  • Publication number: 20240191955
    Abstract: A high corrosion resistance heat exchanger is disclosed, which has improved corrosion resistance. The improved corrosion resistance is achieved by controlling alloy components in a tube material and a fin material and inducing sacrificial corrosion of the fin material. The high corrosion resistance heat exchanger includes a tube having a channel formed therein to allow a refrigerant to flow, and a plurality of fins coupled to the outer circumferential surface of the tube. The fins may contain 0.1 wt % to 0.45 wt % of Mg, and 0.5 wt % to 0.8 wt % of Zn, a remainder wt % of Al.
    Type: Application
    Filed: February 23, 2024
    Publication date: June 13, 2024
    Inventors: Sungmin YOO, Myounghun KIM, Juik OH, Youngchan YOON, Sangjoe CHOI
  • Publication number: 20240030822
    Abstract: A direct-current (DC)-DC converter includes a converting circuit including an inductor element. The converting circuit is configured to generate an output voltage from an input voltage based on a switching operation. An inductor current emulator is configured to adjust at least one parameter for changing a current peak value of the inductor element in response to a change in a level of the input voltage and is configured to generate an internal voltage based on the at least one parameter, which is adjusted. The inductor current emulator is configured to generate a control signal for controlling the switching operation such that current of the inductor element has a pattern corresponding to a pattern of the internal voltage.
    Type: Application
    Filed: September 18, 2023
    Publication date: January 25, 2024
    Applicants: Samsung Electronics Co., Ltd., Korea University Research and Business Foundation
    Inventors: Sungmin YOO, Taehwang KONG, Sangho KIM, Junhyeok YANG, Hyungmin LEE, Yunho LEE, Woojoong JUNG
  • Patent number: 11804778
    Abstract: A direct-current (DC)-DC converter includes a converting circuit including an inductor element. The converting circuit is configured to generate an output voltage from an input voltage based on a switching operation. An inductor current emulator is configured to adjust at least one parameter for changing a current peak value of the inductor element in response to a change in a level of the input voltage and is configured to generate an internal voltage based on the at least one parameter, which is adjusted. The inductor current emulator is configured to generate a control signal for controlling the switching operation such that current of the inductor element has a pattern corresponding to a pattern of the internal voltage.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: October 31, 2023
    Assignees: Samsung Electronics Co., Ltd., Korea University Research and Business Foundation
    Inventors: Sungmin Yoo, Taehwang Kong, Sangho Kim, Junhyeok Yang, Hyungmin Lee, Yunho Lee, Woojoong Jung
  • Publication number: 20230170795
    Abstract: The present disclosure refers to direct current-to-direct current (DC-DC) converters and power supplies including the same. In an embodiment, a DC-DC converter includes a first switching circuit, a second switching circuit, a fourth capacitor coupled to a second node, and an inductor-capacitor (LC) filter coupled to a third node. The first switching circuit includes a first transistor coupled between a first capacitor and an input node, a second transistor coupled between the first capacitor and a second capacitor, a third transistor coupled between a first node and a third capacitor, and a fourth transistor coupled between the third capacitor and a ground node. The second switching circuit includes a fifth transistor coupled between the second capacitor and the third capacitor, a sixth transistor and a seventh transistor coupled between the first capacitor and the third capacitor, and an eighth transistor coupled between the first capacitor and the ground node.
    Type: Application
    Filed: November 23, 2022
    Publication date: June 1, 2023
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Sungmin YOO, Minsu KIM, Hyungmin LEE, Taehwang KONG, Junhyeok YANG, Woojoong JUNG
  • Publication number: 20230034874
    Abstract: An oscillation detector includes an amplitude variation detection circuit configured to generate a first pulse signal by comparing levels of voltages with each other, a frequency variation detection circuit configured to generate a second pulse signal by filtering the first pulse signal and allowing to pass a frequency component that is less than or equal to a certain frequency among frequency components of the first pulse signal, and a time variation detection circuit configured to output an oscillation detection signal when the second pulse signal has consecutive pulses for a period of time.
    Type: Application
    Filed: July 26, 2022
    Publication date: February 2, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jaeseung LEE, Sungmin YOO, Taehwang KONG, Junhyeok YANG
  • Patent number: 11543841
    Abstract: A power manager circuit is provided. The power manager circuit includes a bandgap reference circuit, first and second monitoring circuits, and a reference buffer. The bandgap reference circuit generates a first voltage, based on an external voltage that is external to the power manager circuit. The first monitoring circuit determines a logical value of a first alarm signal, based on whether a first voltage level of the first voltage is within a first range. The reference buffer generates a second voltage, based on the first voltage. The second monitoring circuit determines a logical value of a second alarm signal, based on whether a second voltage level of the second voltage is within a second range.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: January 3, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sungmin Yoo, Joowon Park, Tae-Hwang Kong, Sangho Kim, Hyunmyoung Kim, Jaeseung Lee
  • Publication number: 20220385186
    Abstract: A DC-DC buck converter for generating an output voltage by stepping down an input voltage includes a converting circuit including a plurality of transistors, a first capacitor, a second capacitor, and an inductor, the converting circuit being configured to form a current path that varies according to a plurality of modes and a plurality of phases; and a control circuit configured to: determine a mode of the converting circuit, from among the plurality of modes, according to a first amplitude of the input voltage and a second amplitude of the output voltage, and determine an ON/OFF state of each transistor of the plurality of transistors according to the determined mode and a phase from among the plurality of phases.
    Type: Application
    Filed: May 31, 2022
    Publication date: December 1, 2022
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Sungmin Yoo, Hyungmin Lee, Woojoong Jung, Taehwang Kong, Junhyeok Yang, Yunho Lee
  • Publication number: 20220381807
    Abstract: A voltage level detector includes a voltage divider that generates a first division voltage and a second division voltage. A first comparator compares any one of the first and second division voltages with a reference. A second comparator compares the other of the first and second division voltages with the reference. A first switch converts a connection path between the first and second division voltages and the first and second comparators based on a clock signal. A determination circuit determines, based on a first comparison signal and a second comparison signal, whether the voltage level detector is normal. A second switch converts a connection path between the first and second comparison signals and input terminals of the determination circuit based on the clock signal.
    Type: Application
    Filed: May 27, 2022
    Publication date: December 1, 2022
    Inventors: SUNGMIN YOO, JAESEUNG LEE, TAEHWANG KONG, JUNHYEOK YANG
  • Publication number: 20220131468
    Abstract: A direct-current (DC)-DC converter includes a converting circuit including an inductor element. The converting circuit is configured to generate an output voltage from an input voltage based on a switching operation. An inductor current emulator is configured to adjust at least one parameter for changing a current peak value of the inductor element in response to a change in a level of the input voltage and is configured to generate an internal voltage based on the at least one parameter, which is adjusted. The inductor current emulator is configured to generate a control signal for controlling the switching operation such that current of the inductor element has a pattern corresponding to a pattern of the internal voltage.
    Type: Application
    Filed: July 30, 2021
    Publication date: April 28, 2022
    Applicants: Samsung Electronics Co., Ltd., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Sungmin YOO, Taehwang KONG, Sangho KIM, Junhyeok YANG, Hyungmin LEE, Yunho LEE, Woojoong JUNG
  • Patent number: 11196344
    Abstract: A direct current (DC)-DC converter including: a power switching circuit including a first switch circuit and a second switch circuit that are connected in parallel to a switching node, the first switch circuit and the second switch circuit configured to generate a switching voltage signal through the switching node in response to an input DC voltage and configured to perform complementary switching operations to control a voltage level of the switching voltage signal; and a filter circuit configured to filter the switching voltage signal to generate an output DC voltage.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: December 7, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Sungmin Yoo, Hyungmin Lee, Taehwang Kong, Sangho Kim, Seun Shin, Junhyeok Yang, Woojoong Jung
  • Publication number: 20210294365
    Abstract: A power manager circuit is provided. The power manager circuit includes a bandgap reference circuit, first and second monitoring circuits, and a reference buffer. The bandgap reference circuit generates a first voltage, based on an external voltage that is external to the power manager circuit. The first monitoring circuit determines a logical value of a first alarm signal, based on whether a first voltage level of the first voltage is within a first range. The reference buffer generates a second voltage, based on the first voltage. The second monitoring circuit determines a logical value of a second alarm signal, based on whether a second voltage level of the second voltage is within a second range.
    Type: Application
    Filed: October 13, 2020
    Publication date: September 23, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: SUNGMIN YOO, Joowon Park, Tae-Hwang Kong, Sangho Kim, Hyunmyoung Kim, Jaeseung Lee
  • Publication number: 20200395852
    Abstract: A direct current (DC)-DC converter including: a power switching circuit including a first switch circuit and a second switch circuit that are connected in parallel to a switching node, the first switch circuit and the second switch circuit configured to generate a switching voltage signal through the switching node in response to an input DC voltage and configured to perform complementary switching operations to control a voltage level of the switching voltage signal; and a filter circuit configured to filter the switching voltage signal to generate an output DC voltage.
    Type: Application
    Filed: February 12, 2020
    Publication date: December 17, 2020
    Inventors: Sungmin YOO, Hyungmin LEE, Taehwang KONG, Sangho KIM, Seun SHIN, Junhyeok YANG, Woojoong JUNG