Patents by Inventor Dong-Jin Keum
Dong-Jin Keum 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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Publication number: 20230246551Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.Type: ApplicationFiled: April 6, 2023Publication date: August 3, 2023Inventors: SUN-KYU LEE, NGUYEN HUYHIEU, DONG-JIN KEUM, JE-HYUNG YOON, HEE-SEOK HAN
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Patent number: 11699954Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.Type: GrantFiled: September 6, 2021Date of Patent: July 11, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: Sun-Kyu Lee, Nguyen Huyhieu, Dong-Jin Keum, Je-Hyung Yoon, Hee-Seok Han
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Patent number: 11637498Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.Type: GrantFiled: September 6, 2021Date of Patent: April 25, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: Sun-Kyu Lee, Nguyen Huyhieu, Dong-Jin Keum, Je-Hyung Yoon, Hee-Seok Han
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Publication number: 20210399641Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.Type: ApplicationFiled: September 6, 2021Publication date: December 23, 2021Inventors: SUN-KYU LEE, NGUYEN HUYHIEU, DONG-JIN KEUM, JE-HYUNG YOON, HEE-SEOK HAN
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Patent number: 11152860Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.Type: GrantFiled: August 14, 2019Date of Patent: October 19, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Sun-Kyu Lee, Nguyen Huyhieu, Dong-Jin Keum, Je-Hyung Yoon, Hee-Seok Han
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Patent number: 10921377Abstract: A fuel gauge system for measuring the amount of current in a battery is provided. The fuel gauge system includes a first resistive element connected in series to the battery, a second resistive element connected in series to the first resistive element, a first switch connected in parallel to the second resistive element to control a current flowing in the second resistive element, a second switch connected in series to the second resistive element to control the current flowing in the second resistive element, a controller configured to output a first switching signal to the first switch and output a second switching signal to the second switch, and a fuel gauge circuit configured to measure a battery current flowing in the first resistive element and the second resistive element.Type: GrantFiled: October 15, 2018Date of Patent: February 16, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Kudo Ryotaro, Dong Jin Keum, Byung Chul Jeon, Jin Sub Choi
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Publication number: 20200119648Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.Type: ApplicationFiled: August 14, 2019Publication date: April 16, 2020Inventors: SUN-KYU LEE, NGUYEN HUYHIEU, DONG-JIN KEUM, JE-HYUNG YOON, HEE-SEOK HAN
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Publication number: 20190049519Abstract: A fuel gauge system for measuring the amount of current in a battery is provided. The fuel gauge system includes a first resistive element connected in series to the battery, a second resistive element connected in series to the first resistive element, a first switch connected in parallel to the second resistive element to control a current flowing in the second resistive element, a second switch connected in series to the second resistive element to control the current flowing in the second resistive element, a controller configured to output a first switching signal to the first switch and output a second switching signal to the second switch, and a fuel gauge circuit configured to measure a battery current flowing in the first resistive element and the second resistive element.Type: ApplicationFiled: October 15, 2018Publication date: February 14, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Kudo Ryotaro, Dong Jin Keum, Byung Chul Jeon, Jin Sub Choi
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Patent number: 10107862Abstract: A fuel gauge system for measuring the amount of current in a battery is provided. The fuel gauge system includes a first resistive element connected in series to the battery, a second resistive element connected in series to the first resistive element, a first switch connected in parallel to the second resistive element to control a current flowing in the second resistive element, a second switch connected in series to the second resistive element to control the current flowing in the second resistive element, a controller configured to output a first switching signal to the first switch and output a second switching signal to the second switch, and a fuel gauge circuit configured to measure a battery current flowing in the first resistive element and the second resistive element.Type: GrantFiled: October 6, 2016Date of Patent: October 23, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Kudo Ryotaro, Dong Jin Keum, Byung Chul Jeon, Jin Sub Choi
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Patent number: 9983605Abstract: A voltage regulator may include an error amplifier configured to amplify a difference between a reference voltage and a feedback voltage and generate a first amplified voltage based thereon; a power transistor between a second voltage supply node and an output node of the voltage regulator, the power transistor including a gate configured to receive a gate voltage; a buffer between a first voltage supply node and a ground, the buffer configured to generate the gate voltage based on the first amplified voltage; a voltage divider between the output node and the ground, the voltage divider configured to generate the feedback voltage based on the output voltage; and a control circuit configured to connect the output node to the ground through the gate of the power transistor based on the output voltage and the gate voltage.Type: GrantFiled: August 8, 2016Date of Patent: May 29, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Hoang Quoc Duong, Sung Woo Moon, Hyun Seok Shin, Dong Jin Keum
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Patent number: 9939832Abstract: A voltage regulator is provided that includes an error amplifier circuit having a reference voltage input port that receives a reference voltage, N input ports, N output ports, and N power transistors, where N is a positive integer that is greater than or equal to 2. Each of the power transistors has a gate that is connected to one of the N output ports. The error amplifier amplifies a difference between the reference voltage and each of N respective feedback voltages input to the N input ports, respectively, and outputs amplified voltages to the respective N output ports.Type: GrantFiled: November 23, 2016Date of Patent: April 10, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Hoang Quoc Duong, Dong Jin Keum, Hyun Seok Shin
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Patent number: 9859796Abstract: A method of operating a buck-boost converter including an inductor and a capacitor includes; operating the buck-boost converter in boost mode until a level of an input voltage applied at an input node of the buck-boost converter reaches a desired level of an output voltage apparent at an output node of the buck-boost converter, and after the level of an input voltage reaches the desired level of the output voltage, operating the buck-boost converter in buck mode, wherein operating the buck-boost converter in buck mode and operating the buck-boost converter in boost mode overlap at least in part temporally proximate a point at which the level of the input voltage exceeds the level of the output voltage.Type: GrantFiled: April 16, 2015Date of Patent: January 2, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Gil-Won Yoon, Dong-Jin Keum, Yus Ko, Gwang-Yol Noh, Sung-Woo Moon, Min-Ho Choi
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Publication number: 20170269620Abstract: A voltage regulator is provided that includes an error amplifier circuit having a reference voltage input port that receives a reference voltage, N input ports, N output ports, and N power transistors, where N is a positive integer that is greater than or equal to 2. Each of the power transistors has a gate that is connected to one of the N output ports. The error amplifier amplifies a difference between the reference voltage and each of N respective feedback voltages input to the N input ports, respectively, and outputs amplified voltages to the respective N output ports.Type: ApplicationFiled: November 23, 2016Publication date: September 21, 2017Inventors: HOANG QUOC DUONG, DONG JIN KEUM, HYUN SEOK SHIN
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Publication number: 20170199537Abstract: A voltage regulator may include an error amplifier configured to amplify a difference between a reference voltage and a feedback voltage and generate a first amplified voltage based thereon; a power transistor between a second voltage supply node and an output node of the voltage regulator, the power transistor including a gate configured to receive a gate voltage; a buffer between a first voltage supply node and a ground, the buffer configured to generate the gate voltage based on the first amplified voltage; a voltage divider between the output node and the ground, the voltage divider configured to generate the feedback voltage based on the output voltage; and a control circuit configured to connect the output node to the ground through the gate of the power transistor based on the output voltage and the gate voltage.Type: ApplicationFiled: August 8, 2016Publication date: July 13, 2017Applicant: Samsung Electronics Co., Ltd.Inventors: Hoang Quoc DUONG, Sung Woo MOON, Hyun Seok SHIN, Dong Jin KEUM
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Patent number: 9705401Abstract: A buck-boost converter includes: a converting circuit; a ripple injector; a hysteresis comparator; and a switching controller. The converting circuit is configured to generate an output voltage by adjusting an input voltage in a buck mode, a boost mode, and a buck-boost mode. The ripple injector is configured to generate a ripple based on switching signals corresponding to switching operations of the converting circuit. The hysteresis comparator outputs at least one switching control signal by comparing an output control voltage with a feedback voltage generated by adding the ripple to a divided voltage generated by performing a voltage division on the output voltage. The switching controller is configured to change a current flow path of the converting circuit based on the at least one switching control signal.Type: GrantFiled: June 17, 2015Date of Patent: July 11, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-Soo Cho, Jae-Yeol Han, Dong-Jin Keum, Il-Young Sohn, Ryotaro Kudo
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Patent number: 9667239Abstract: A voltage regulator includes a high duty cycle detector, a feedback controller, a hysteretic comparator, and first and second drivers. The high duty cycle detector generates a high duty cycle signal based on a power supply voltage and a reference voltage. The feedback controller generates first and second feedback voltages based on the reference voltage, the high duty cycle signal and an output voltage of the voltage regulator. The hysteretic comparator compares the reference voltage and the first feedback voltage to generate a control signal. When the first feedback voltage is activated, the first driver drives an output node that provides the output voltage based on the control signal and the high duty cycle signal. When the second feedback voltage is activated, the second driver generates a third voltage proportional to the reference voltage based on the power supply voltage and the second feedback voltage, and drives the output node with the third voltage.Type: GrantFiled: June 2, 2016Date of Patent: May 30, 2017Assignee: Samsung Electronics Co., Ltd.Inventors: Takahiro Nomiyama, Dong-Jin Keum, Hoang Quoc Duong, Jae-Yeol Han
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Publication number: 20170131358Abstract: A fuel gauge system for measuring the amount of current in a battery is provided. The fuel gauge system includes a first resistive element connected in series to the battery, a second resistive element connected in series to the first resistive element, a first switch connected in parallel to the second resistive element to control a current flowing in the second resistive element, a second switch connected in series to the second resistive element to control the current flowing in the second resistive element, a controller configured to output a first switching signal to the first switch and output a second switching signal to the second switch, and a fuel gauge circuit configured to measure a battery current flowing in the first resistive element and the second resistive element.Type: ApplicationFiled: October 6, 2016Publication date: May 11, 2017Applicant: Samsung Electronics Co., Ltd.Inventors: Kudo RYOTARO, Dong Jin KEUM, Byung Chul JEON, Jin Sub CHOI
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Publication number: 20170085256Abstract: A voltage regulator includes a high duty cycle detector, a feedback controller, a hysteretic comparator, and first and second drivers. The high duty cycle detector generates a high duty cycle signal based on a power supply voltage and a reference voltage. The feedback controller generates first and second feedback voltages based on the reference voltage, the high duty cycle signal and an output voltage of the voltage regulator. The hysteretic comparator compares the reference voltage and the first feedback voltage to generate a control signal. When the first feedback voltage is activated, the first driver drives an output node that provides the output voltage based on the control signal and the high duty cycle signal. When the second feedback voltage is activated, the second driver generates a third voltage proportional to the reference voltage based on the power supply voltage and the second feedback voltage, and drives the output node with the third voltage.Type: ApplicationFiled: June 2, 2016Publication date: March 23, 2017Inventors: TAKAHIRO NOMIYAMA, DONG-JIN KEUM, HOANG QUOC DUONG, JAE-YEOL HAN
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Patent number: 9595866Abstract: A switching regulator includes a power converting unit and a switch driving unit. The power converting unit is configured to generate a direct current (DC) output voltage based on a switch driving signal and a DC input voltage. The switch driving unit is configured to generate a ripple voltage having information of an inductor current flowing through the power converting unit, add the ripple voltage to a reference voltage to generate a first voltage having a ripple, generate a feedback voltage based on the DC output voltage, compare the first voltage with the feedback voltage in a hysteresis mode to generate a comparison output, and generate the switch driving signal based on the comparison output.Type: GrantFiled: August 29, 2014Date of Patent: March 14, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-Ho Choi, Dong-Jin Keum, Gil-Won Yoon, Yus Ko
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Patent number: 9590505Abstract: A switching regulator includes a DC-DC converter and a dynamic voltage positioning circuit. The DC-DC converter includes an inductor connected between an input port and an output port. The dynamic voltage positioning circuit includes a sensing circuit and a mirroring circuit. The sensing circuit is configured to sense an inductor current flowing through the inductor, and to convert a voltage applied to a direct current resistance (DCR) of the inductor into a droop current using a variable resistor. The mirroring circuit is configured to cause a voltage drop at the output port of the DC-DC converter based on a current corresponding to a difference between a bias current and the droop current.Type: GrantFiled: November 17, 2014Date of Patent: March 7, 2017Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Woo Moon, Hyun-Wook Yoo, Yus Ko, Dong-Jin Keum, Pyung-Woo Yeon