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: 20250221056Abstract: 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: ApplicationFiled: December 19, 2024Publication date: July 3, 2025Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Himchan PARK, Jooseong Kim, Junhyeok Yang, Sungmin Yoo, Haejung Choi
-
Patent number: 12334823Abstract: 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: GrantFiled: May 31, 2022Date of Patent: June 17, 2025Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Sungmin Yoo, Hyungmin Lee, Woojoong Jung, Taehwang Kong, Junhyeok Yang, Yunho Lee
-
Patent number: 12283884Abstract: 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: GrantFiled: November 23, 2022Date of Patent: April 22, 2025Assignees: SAMSUNG ELECTRONICS CO., LTD., Korea University Research and Business FoundationInventors: Sungmin Yoo, Minsu Kim, Hyungmin Lee, Taehwang Kong, Junhyeok Yang, Woojoong Jung
-
Publication number: 20250125724Abstract: 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: ApplicationFiled: October 8, 2024Publication date: April 17, 2025Applicant: Korea Advanced Institute of Science and TechnologyInventors: Doojin Jang, Hyunsik Kim, Junhyeok Yang, Sungmin Yoo, Honghyun Bae
-
Patent number: 12212242Abstract: 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: GrantFiled: September 18, 2023Date of Patent: January 28, 2025Assignees: Samsung Electronics Co., Ltd., Korean University Research and Business FoundationInventors: Sungmin Yoo, Taehwang Kong, Sangho Kim, Junhyeok Yang, Hyungmin Lee, Yunho Lee, Woojoong Jung
-
Publication number: 20250021122Abstract: 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: ApplicationFiled: January 15, 2024Publication date: January 16, 2025Applicant: Samsung Electronics Co., Ltd.Inventors: Haejung CHOI, Jooseong KIM, Junhyeok YANG, Sungmin YOO
-
Patent number: 12117472Abstract: 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: GrantFiled: July 26, 2022Date of Patent: October 15, 2024Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jaeseung Lee, Sungmin Yoo, Taehwang Kong, Junhyeok Yang
-
Publication number: 20240336797Abstract: 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: ApplicationFiled: March 28, 2024Publication date: October 10, 2024Inventors: Sungjun KOH, Daehee LEE, Ilju MUN, Kyoungmo NAM, Hyunjin KANG, Gilran KIM, Sungmin YOO, Wonseok YU, Mihee YUN, Euyjin LEE
-
Publication number: 20240191955Abstract: 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: ApplicationFiled: February 23, 2024Publication date: June 13, 2024Inventors: Sungmin YOO, Myounghun KIM, Juik OH, Youngchan YOON, Sangjoe CHOI
-
Publication number: 20240030822Abstract: 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: ApplicationFiled: September 18, 2023Publication date: January 25, 2024Applicants: Samsung Electronics Co., Ltd., Korea University Research and Business FoundationInventors: Sungmin YOO, Taehwang KONG, Sangho KIM, Junhyeok YANG, Hyungmin LEE, Yunho LEE, Woojoong JUNG
-
Patent number: 11804778Abstract: 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: GrantFiled: July 30, 2021Date of Patent: October 31, 2023Assignees: Samsung Electronics Co., Ltd., Korea University Research and Business FoundationInventors: Sungmin Yoo, Taehwang Kong, Sangho Kim, Junhyeok Yang, Hyungmin Lee, Yunho Lee, Woojoong Jung
-
Publication number: 20230170795Abstract: 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: ApplicationFiled: November 23, 2022Publication date: June 1, 2023Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Sungmin YOO, Minsu KIM, Hyungmin LEE, Taehwang KONG, Junhyeok YANG, Woojoong JUNG
-
Publication number: 20230034874Abstract: 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: ApplicationFiled: July 26, 2022Publication date: February 2, 2023Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jaeseung LEE, Sungmin YOO, Taehwang KONG, Junhyeok YANG
-
Patent number: 11543841Abstract: 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: GrantFiled: October 13, 2020Date of Patent: January 3, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sungmin Yoo, Joowon Park, Tae-Hwang Kong, Sangho Kim, Hyunmyoung Kim, Jaeseung Lee
-
Publication number: 20220385186Abstract: 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: ApplicationFiled: May 31, 2022Publication date: December 1, 2022Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Sungmin Yoo, Hyungmin Lee, Woojoong Jung, Taehwang Kong, Junhyeok Yang, Yunho Lee
-
Publication number: 20220381807Abstract: 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: ApplicationFiled: May 27, 2022Publication date: December 1, 2022Inventors: SUNGMIN YOO, JAESEUNG LEE, TAEHWANG KONG, JUNHYEOK YANG
-
Publication number: 20220131468Abstract: 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: ApplicationFiled: July 30, 2021Publication date: April 28, 2022Applicants: Samsung Electronics Co., Ltd., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Sungmin YOO, Taehwang KONG, Sangho KIM, Junhyeok YANG, Hyungmin LEE, Yunho LEE, Woojoong JUNG
-
Patent number: 11196344Abstract: 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: GrantFiled: February 12, 2020Date of Patent: December 7, 2021Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Sungmin Yoo, Hyungmin Lee, Taehwang Kong, Sangho Kim, Seun Shin, Junhyeok Yang, Woojoong Jung
-
Publication number: 20210294365Abstract: 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: ApplicationFiled: October 13, 2020Publication date: September 23, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: SUNGMIN YOO, Joowon Park, Tae-Hwang Kong, Sangho Kim, Hyunmyoung Kim, Jaeseung Lee
-
Publication number: 20200395852Abstract: 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: ApplicationFiled: February 12, 2020Publication date: December 17, 2020Inventors: Sungmin YOO, Hyungmin LEE, Taehwang KONG, Sangho KIM, Seun SHIN, Junhyeok YANG, Woojoong JUNG