Patents by Inventor Shingo Hashiguchi
Shingo Hashiguchi 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: 20230198397Abstract: A switching power supply device includes first and second switches connected in series between an application terminal for an input voltage and an application terminal for a voltage lower than the input voltage, and a controller configured to turn on and off the first and second switches. The controller has a first state where it keeps the first switch on and the second switch off, followed by a second state where it keeps the first switch off and the second switch on, followed by a third state where it keeps the first and second switches off, followed by a fourth state where it keeps the voltage at the connection node between the first and second switches lower than in the third state. The controller repeats the first, second, third, and fourth states at a fixed cycle.Type: ApplicationFiled: May 28, 2021Publication date: June 22, 2023Inventors: Shingo Hashiguchi, Isao Takobe, Kosuke Sato, Yuhei Yamaguchi
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Publication number: 20230146300Abstract: An output feedback control circuit includes, for example, a first amplifier 140a configured to generate a first error signal ERR1 commensurate with a difference between an output voltage, which is fed to a load, or a feedback voltage FB commensurate therewith and a reference voltage REF, a second amplifier 140b configured to be faster than the first amplifier 140a and to generate a second error signal ERR2 commensurate with a difference between the output voltage or the feedback voltage FB and the first error signal ERR1 (or the reference voltage REF), a calculator 145 configured to superimpose a remote sense signal RSGND, which is derived from a grounded terminal of the load, on the reference voltage REF, which is fed to the first amplifier 140a, and a capacitor Cc connected between an application terminal for the first error signal ERR1 and an application terminal for the remote sense signal RSGND.Type: ApplicationFiled: February 26, 2021Publication date: May 11, 2023Inventors: Isao Takobe, Shingo Hashiguchi
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Patent number: 11606033Abstract: The switching power supply device includes first and second switches connected in series between an application end of an input voltage and an application end of a low voltage lower than the input voltage, and third and fourth switches connected in series between an application end of the input voltage and an application end of the low voltage, and a control unit configured to control the on/off state of each of the first to fourth switches. The first to fourth switches are configured such that an inductor is provided between a first connection node connecting the first switch and the second switch and a second connection node connecting the third switch and the fourth switch.Type: GrantFiled: May 26, 2021Date of Patent: March 14, 2023Assignee: ROHM CO., LTD.Inventors: Shingo Hashiguchi, Isao Takobe, Keita Itohara, Akihiro Kawano, Hironori Sumitomo
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Patent number: 11550349Abstract: A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; a driver for driving the output transistor; and a feedback unit for feeding, back to the driver, information about an output electrical current that is output from the output end. The driver drives the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage, as well as the information.Type: GrantFiled: October 21, 2019Date of Patent: January 10, 2023Assignee: Rohm Co., Ltd.Inventors: Isao Takobe, Yuhei Yamaguchi, Yukihiro Watanabe, Shingo Hashiguchi
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Patent number: 11515788Abstract: Provided is a switching control circuit used for a switching power supply device for generating an output voltage from an input voltage. The switching control circuit includes an intermittent operation mode for repeating an active period in which an output switching element of the switching power supply device is switched and an inactive period in which the output switching element is not switched. The switching control circuit is provided with a modulation unit for modulating a pulse frequency of a switching control signal during the active period, and performs control of switching of the output switching element by the switching control signal during the active period.Type: GrantFiled: January 28, 2019Date of Patent: November 29, 2022Assignee: Rohm Co., Ltd.Inventor: Shingo Hashiguchi
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Publication number: 20220321007Abstract: A switching power supply device includes a first switch with a first terminal connectable to an application terminal for the input voltage and a second terminal connectable to the first terminal of an inductor; a second switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to an application terminal for a voltage lower than the input voltage; a third switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to the second terminal of the inductor; a detector; and a controller. The controller produces, after occurrence or a sign of occurrence of an overshoot in the output voltage is detected by the detector until settlement of the overshoot in the output voltage, a control state in which to keep the first and second switches off and the third switch on.Type: ApplicationFiled: June 12, 2020Publication date: October 6, 2022Inventors: Kosuke Sato, Tetsuo Tateishi, Shingo Hashiguchi, Isao Takobe, Yuhei Yamaguchi
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Publication number: 20210382510Abstract: A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; a driver for driving the output transistor; and a feedback unit for feeding, back to the driver, information about an output electrical current that is output from the output end. The driver drives the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage, as well as the information.Type: ApplicationFiled: October 21, 2019Publication date: December 9, 2021Inventors: Isao Takobe, Yuhei Yamaguchi, Yukihiro WATANABE, Shingo Hashiguchi
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Publication number: 20210376727Abstract: The switching power supply device includes first and second switches connected in series between an application end of an input voltage and an application end of a low voltage lower than the input voltage, and third and fourth switches connected in series between an application end of the input voltage and an application end of the low voltage, and a control unit configured to control the on/off state of each of the first to fourth switches. The first to fourth switches are configured such that an inductor is provided between a first connection node connecting the first switch and the second switch and a second connection node connecting the third switch and the fourth switch.Type: ApplicationFiled: May 26, 2021Publication date: December 2, 2021Inventors: Shingo Hashiguchi, Isao Takobe, Keita Itohara, Akihiro KAWANO, Hironori SUMITOMO
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Patent number: 11079785Abstract: There is provided a linear regulator including: a first output transistor connected between a first input terminal to which a first input voltage is applied and an output terminal from which an output voltage is outputted; a second output transistor connected between a second input terminal to which a second input voltage is applied and the output terminal; and a control circuit configured to control the first output transistor when the second input voltage of a predetermined range is not supplied to the second input terminal, and to control the second output transistor when the first input voltage of the predetermined range is not supplied to the first input terminal.Type: GrantFiled: March 5, 2019Date of Patent: August 3, 2021Assignee: Rohm Co., Ltd.Inventor: Shingo Hashiguchi
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Patent number: 11005369Abstract: Provided is an integrated circuit package which complementarily switches on/off a MOS transistor Q1 (first switch) and MOS transistor Q2 (second switch) in accordance with an output voltage Vout, and which externally outputs a pulse signal having a fixed on-duty D during a step-up/step-down mode. The integrated circuit package has a determination unit 61 for determining the impedance of an external component connected to an external pin P5 that outputs the pulse signal to the exterior during the step-up/step-down mode, and determining whether the external component is a third switch on the basis of the impedance determination result.Type: GrantFiled: August 2, 2017Date of Patent: May 11, 2021Assignee: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Tetsuo Tateishi
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Patent number: 10980109Abstract: A printed circuit board has: a first wiring pattern laid in a first layer such that, when a predetermined component is mounted in a predetermined mounting region, a first current path in an open ring shape leading from a first end to a second end is formed; a second wiring pattern laid in a second layer different from the first layer such that a second current path in an open ring shape leading from a third end to a fourth end is formed; a first conductive member formed between the second and third ends; and a second conductive member formed between the first and fourth ends. The first and second wiring patterns are so laid that, as seen in their respective plan views, the directions of the currents flowing across the first and second current paths, respectively, are opposite to each other.Type: GrantFiled: April 22, 2020Date of Patent: April 13, 2021Assignee: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Shoichi Harada
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Publication number: 20200403511Abstract: Provided is a switching control circuit used for a switching power supply device for generating an output voltage from an input voltage. The switching control circuit includes an intermittent operation mode for repeating an active period in which an output switching element of the switching power supply device is switched and an inactive period in which the output switching element is not switched. The switching control circuit is provided with a modulation unit for modulating a pulse frequency of a switching control signal during the active period, and performs control of switching of the output switching element by the switching control signal during the active period.Type: ApplicationFiled: January 28, 2019Publication date: December 24, 2020Applicant: Rohm Co., Ltd.Inventor: Shingo Hashiguchi
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Publication number: 20200253039Abstract: A printed circuit board has: a first wiring pattern laid in a first layer such that, when a predetermined component is mounted in a predetermined mounting region, a first current path in an open ring shape leading from a first end to a second end is formed; a second wiring pattern laid in a second layer different from the first layer such that a second current path in an open ring shape leading from a third end to a fourth end is formed; a first conductive member formed between the second and third ends; and a second conductive member formed between the first and fourth ends. The first and second wiring patterns are so laid that, as seen in their respective plan views, the directions of the currents flowing across the first and second current paths, respectively, are opposite to each other.Type: ApplicationFiled: April 22, 2020Publication date: August 6, 2020Applicant: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Shoichi HARADA
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Patent number: 10673332Abstract: A switching regulator control circuit, having: a slope circuit 3 for generating a slope voltage VSLP on the basis of a clock signal CLK of a prescribed frequency; an error amplifier 1 for generating an error signal Vc corresponding to the difference between a reference voltage VREF and a voltage VFB corresponding to the output voltage of a switching regulator; a comparator 4 for comparing the error signal Vc and the slope voltage VSLP; and an RS flip-flop 6 set on the basis of the clock signal CLK and reset by a signal outputted by the comparator 4. The timing at which the RS flip-flop 6 is set is delayed with respect to the timing at which the sloping of the slope voltage VSLP is started.Type: GrantFiled: August 2, 2017Date of Patent: June 2, 2020Assignee: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Tetsuo Tateishi
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Patent number: 10667383Abstract: A printed circuit board has: a first wiring pattern laid in a first layer such that, when a predetermined component is mounted in a predetermined mounting region, a first current path in an open ring shape leading from a first end to a second end is formed; a second wiring pattern laid in a second layer different from the first layer such that a second current path in an open ring shape leading from a third end to a fourth end is formed; a first conductive member formed between the second and third ends; and a second conductive member formed between the first and fourth ends. The first and second wiring patterns are so laid that, as seen in their respective plan views, the directions of the currents flowing across the first and second current paths, respectively, are opposite to each other.Type: GrantFiled: September 24, 2019Date of Patent: May 26, 2020Assignee: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Shoichi Harada
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Publication number: 20200022253Abstract: A printed circuit board has: a first wiring pattern laid in a first layer such that, when a predetermined component is mounted in a predetermined mounting region, a first current path in an open ring shape leading from a first end to a second end is formed; a second wiring pattern laid in a second layer different from the first layer such that a second current path in an open ring shape leading from a third end to a fourth end is formed; a first conductive member formed between the second and third ends; and a second conductive member formed between the first and fourth ends. The first and second wiring patterns are so laid that, as seen in their respective plan views, the directions of the currents flowing across the first and second current paths, respectively, are opposite to each other.Type: ApplicationFiled: September 24, 2019Publication date: January 16, 2020Applicant: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Shoichi HARADA
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Patent number: 10470295Abstract: A printed circuit board has: a first wiring pattern laid in a first layer such that, when a predetermined component is mounted in a predetermined mounting region, a first current path in an open ring shape leading from a first end to a second end is formed; a second wiring pattern laid in a second layer different from the first layer such that a second current path in an open ring shape leading from a third end to a fourth end is formed; a first conductive member formed between the second and third ends; and a second conductive member formed between the first and fourth ends. The first and second wiring patterns are so laid that, as seen in their respective plan views, the directions of the currents flowing across the first and second current paths, respectively, are opposite to each other.Type: GrantFiled: March 6, 2018Date of Patent: November 5, 2019Assignee: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Shoichi Harada
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Publication number: 20190319536Abstract: A switching regulator control circuit, having: a slope circuit 3 for generating a slope voltage VSLP on the basis of a clock signal CLK of a prescribed frequency; an error amplifier 1 for generating an error signal Vc corresponding to the difference between a reference voltage VREF and a voltage VFB corresponding to the output voltage of a switching regulator; a comparator 4 for comparing the error signal Vc and the slope voltage VSLP; and an RS flip-flop 6 set on the basis of the clock signal CLK and reset by a signal outputted by the comparator 4. The timing at which the RS flip-flop 6 is set is delayed with respect to the timing at which the sloping of the slope voltage VSLP is started.Type: ApplicationFiled: August 2, 2017Publication date: October 17, 2019Applicant: Rohm Co., Ltd.Inventors: Shingo Hashiguchi, Tetsuo Tateishi
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Publication number: 20190278314Abstract: There is provided a linear regulator including: a first output transistor connected between a first input terminal to which a first input voltage is applied and an output terminal from which an output voltage is outputted; a second output transistor connected between a second input terminal to which a second input voltage is applied and the output terminal; and a control circuit configured to control the first output transistor when the second input voltage of a predetermined range is not supplied to the second input terminal, and to control the second output transistor when the first input voltage of the predetermined range is not supplied to the first input terminal.Type: ApplicationFiled: March 5, 2019Publication date: September 12, 2019Applicant: Rohm Co., Ltd.Inventor: Shingo Hashiguchi
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Patent number: 10355589Abstract: In a switching regulator, a first switch and a second switch are turned ON and OFF complementarily according to an output voltage. In a step-up/down mode, a third switch and a fourth switch are turned ON and OFF complementarily while the ON-duty D of the third switch is kept fixed.Type: GrantFiled: June 28, 2016Date of Patent: July 16, 2019Assignee: Rohm Co., Ltd.Inventors: Tetsuo Tateishi, Yuhei Yamaguchi, Shingo Hashiguchi, Kiyotaka Umemoto