Patents by Inventor Seunguk YANG
Seunguk YANG 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: 10432187Abstract: A power supply device includes a power switch that is switched according to a gate voltage. A sense resistor receives a switch current that flows through the power switch to develop a sense voltage. A peak of a primary-side current is detected from the sense voltage. The gate driver has a pair of switches for generating the gate voltage in accordance with a control signal. When a low-side switch of the gate driver is turned on according to the control signal, the gate voltage of the power switch decreases as a sink current flows from the gate of the power switch via the transistor.Type: GrantFiled: September 28, 2017Date of Patent: October 1, 2019Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Taesung Kim, Seunguk Yang, Inki Park
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Patent number: 10405381Abstract: A light emitting diode (LED) control circuit includes an inductor current sense circuit with a high-side diode string, a low-side diode string, and a sense resistor in series with and between the high-side and low side diode strings. The LED control circuit receives an input voltage on an end that connects to the high-side diode string. An end of the low-side diode string is connected to a switch through an inductor. A sense voltage developed on the sense resistor by an inductor current is sensed by a controller integrated circuit (IC). A pin of the controller IC that receives the sense voltage can have a breakdown voltage specification that is lower than the input voltage.Type: GrantFiled: May 22, 2017Date of Patent: September 3, 2019Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Minwoo Lee, Moonsik Song, Seunguk Yang
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Patent number: 10374585Abstract: A signal calculator includes a capacitor and a variable current source. The variable current source charges the capacitor and generates a current corresponding to a predetermined voltage during a first period. A first voltage is generated using a voltage of the capacitor charged during an enable period of a first signal in the first period, and a second voltage is generated using a voltage of the capacitor charged during the first period. The variable current source further generates a current corresponding to the second voltage during a second period. A second signal is generated according to a result of comparing the first voltage with the voltage of the capacitor during the second period, and a fourth voltage is generated by generating and sampling a third voltage which is increased according to a first current during an enable period of the second signal in the second period.Type: GrantFiled: February 19, 2019Date of Patent: August 6, 2019Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Taesung Kim, Seunguk Yang, Youngbae Park
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Publication number: 20190190504Abstract: A signal calculator includes a capacitor and a variable current source. The variable current source charges the capacitor and generates a current corresponding to a predetermined voltage during a first period. A first voltage is generated using a voltage of the capacitor charged during an enable period of a first signal in the first period, and a second voltage is generated using a voltage of the capacitor charged during the first period. The variable current source further generates a current corresponding to the second voltage during a second period. A second signal is generated according to a result of comparing the first voltage with the voltage of the capacitor during the second period, and a fourth voltage is generated by generating and sampling a third voltage which is increased according to a first current during an enable period of the second signal in the second period.Type: ApplicationFiled: February 19, 2019Publication date: June 20, 2019Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Taesung KIM, Seunguk YANG, Youngbae PARK
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Patent number: 10250238Abstract: Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.Type: GrantFiled: July 27, 2017Date of Patent: April 2, 2019Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Taesung Kim, Seunguk Yang, Youngbae Park
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Patent number: 10236772Abstract: An electronic device includes a first circuit having a first ground that receives first and second control signals. A third control signal is produced by a second circuit. The second circuit uses a second ground, and the first ground floats with respect to the second ground. The first circuit determines a value corresponding to a value of a third control signal using a difference between a value of the first control signal and a value of the second control signal, the value of a third control signal being a value relative to the second ground. The first circuit controls a value of an output signal of the first circuit according to the value corresponding to the value of a third control signal.Type: GrantFiled: February 9, 2018Date of Patent: March 19, 2019Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Seunguk Yang, Wonseok Lim
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Patent number: 10178729Abstract: A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a lighting controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a dimming signal. The controller IC generates a low reference threshold and a high reference threshold that follow the dimming signal. The lighting controller IC controls the transistor by hysteretic control by comparing a sense signal indicative of the current through the LED to the low reference threshold and the high reference threshold.Type: GrantFiled: July 20, 2017Date of Patent: January 8, 2019Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Seunguk Yang, Moonsik Song, Hyunchul Eum
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Patent number: 10104728Abstract: A light emitting diode (LED) driving circuit disclosed herein controls a switching operation of a power switch connected to an LED string and includes a reference voltage generator configured to generate a frequency modulation reference voltage according to a dimming signal that controls brightness of the LED string, and a switching controller configured to control a switching frequency of the power switch to be constant when a level of the dimming signal is higher than that of the frequency modulation reference voltage, and control the switching frequency of the power switch based on the dimming signal when a level of the dimming signal is lower than that of the frequency modulation reference voltage.Type: GrantFiled: December 15, 2016Date of Patent: October 16, 2018Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Minwoo Lee, Moonsik Song, Seunguk Yang
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Patent number: 10091849Abstract: A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a hybrid dimming signal from a dimming input circuit. The dimming input circuit receives pulse width modulation (PWM) dimming signals and generates the hybrid dimming signal as a PWM dimming signal, an analog dimming signal, or both depending on the received PWM dimming signals.Type: GrantFiled: July 20, 2017Date of Patent: October 2, 2018Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Seunguk Yang, Hyunchul Eum, Eungwoo Lee
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Patent number: 10051699Abstract: An LED control circuit controls a switching operation of a switch by hysteretic control. The LED control circuit includes a controller integrated circuit (IC) that senses a current sense voltage from a current sense resistor that is on a low-side of the switch. The LED control circuit senses the current sense voltage during on-time of the switch to determine when to turn off the switch. During off-time of the switch, the controller IC determines when to turn on the switch by comparing a sawtooth voltage to a turn-on threshold that is generated from the on-time of the switch.Type: GrantFiled: April 27, 2018Date of Patent: August 14, 2018Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Inki Park, Taesung Kim, Seunguk Yang
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Patent number: 9986607Abstract: An LED control circuit controls a switching operation of a switch by hysteretic control. The LED control circuit includes a controller integrated circuit (IC) that senses a current sense voltage from a current sense resistor that is on a low-side of the switch. The LED control circuit senses the current sense voltage during on-time of the switch to determine when to turn off the switch. During off-time of the switch, the controller IC determines when to turn on the switch by comparing a sawtooth voltage to a turn-on threshold that is generated from the on-time of the switch.Type: GrantFiled: June 1, 2017Date of Patent: May 29, 2018Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Inki Park, Taesung Kim, Seunguk Yang
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Publication number: 20180123580Abstract: A power supply device includes a power switch that is switched according to a gate voltage. A sense resistor receives a switch current that flows through the power switch to develop a sense voltage. A peak of a primary-side current is detected from the sense voltage.Type: ApplicationFiled: September 28, 2017Publication date: May 3, 2018Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Taesung KIM, Seunguk YANG, Inki PARK
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Publication number: 20180054865Abstract: A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a hybrid dimming signal from a dimming input circuit. The dimming input circuit receives pulse width modulation (PWM) dimming signals and generates the hybrid dimming signal as a PWM dimming signal, an analog dimming signal, or both depending on the received PWM dimming signals.Type: ApplicationFiled: July 20, 2017Publication date: February 22, 2018Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Seunguk YANG, Hyunchul EUM, Eungwoo LEE
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Publication number: 20180054864Abstract: A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a lighting controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a dimming signal. The controller IC generates a low reference threshold and a high reference threshold that follow the dimming signal. The lighting controller IC controls the transistor by hysteretic control by comparing a sense signal indicative of the current through the LED to the low reference threshold and the high reference threshold.Type: ApplicationFiled: July 20, 2017Publication date: February 22, 2018Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Seunguk YANG, Moonsik SONG, Hyunchul EUM
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Publication number: 20170354004Abstract: An LED control circuit controls a switching operation of a switch by hysteretic control. The LED control circuit includes a controller integrated circuit (IC) that senses a current sense voltage from a current sense resistor that is on a low-side of the switch. The LED control circuit senses the current sense voltage during on-time of the switch to determine when to turn off the switch. During off-time of the switch, the controller IC determines when to turn on the switch by comparing a sawtooth voltage to a turn-on threshold that is generated from the on-time of the switch.Type: ApplicationFiled: June 1, 2017Publication date: December 7, 2017Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Inki PARK, Taesung KIM, Seunguk YANG
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Publication number: 20170354003Abstract: A light emitting diode (LED) control circuit includes an inductor current sense circuit with a high-side diode string, a low-side diode string, and a sense resistor in series with and between the high-side and low side diode strings. The LED control circuit receives an input voltage on an end that connects to the high-side diode string. An end of the low-side diode string is connected to a switch through an inductor. A sense voltage developed on the sense resistor by an inductor current is sensed by a controller integrated circuit (IC). A pin of the controller IC that receives the sense voltage can have a breakdown voltage specification that is lower than the input voltage.Type: ApplicationFiled: May 22, 2017Publication date: December 7, 2017Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Minwoo LEE, Moonsik SONG, Seunguk YANG
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Publication number: 20170324404Abstract: Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.Type: ApplicationFiled: July 27, 2017Publication date: November 9, 2017Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Taesung KIM, Seunguk YANG, Youngbae PARK
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Patent number: 9748935Abstract: Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.Type: GrantFiled: May 27, 2016Date of Patent: August 29, 2017Assignee: Fairchild Korea Semiconductor Ltd.Inventors: Taesung Kim, Seunguk Yang, Youngbae Park
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Publication number: 20170181236Abstract: A light emitting diode (LED) driving circuit disclosed herein controls a switching operation of a power switch connected to an LED string and includes a reference voltage generator configured to generate a frequency modulation reference voltage according to a dimming signal that controls brightness of the LED string, and a switching controller configured to control a switching frequency of the power switch to be constant when a level of the dimming signal is higher than that of the frequency modulation reference voltage, and control the switching frequency of the power switch based on the dimming signal when a level of the dimming signal is lower than that of the frequency modulation reference voltage.Type: ApplicationFiled: December 15, 2016Publication date: June 22, 2017Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Minwoo LEE, Moonsik SONG, Seunguk YANG
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Publication number: 20160352220Abstract: Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.Type: ApplicationFiled: May 27, 2016Publication date: December 1, 2016Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.Inventors: Taesung KIM, Seunguk YANG, Youngbae PARK