-
1.发明公开公开(公告)号：US20230198397A1
公开(公告)日：2023-06-22
申请号：US17925529
申请日：2021-05-28
Applicant: Rohm Co., Ltd.
Inventor： Shingo Hashiguchi , Isao Takobe , Kosuke Sato , Yuhei Yamaguchi
CPC classification number: H02M3/158 , H02M1/0025 , H02M1/0009 , H02M1/0022
Abstract: 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.
-
公开(公告)号：US11606033B2
公开(公告)日：2023-03-14
申请号：US17330775
申请日：2021-05-26
Applicant: ROHM Co., LTD.
Inventor： Shingo Hashiguchi , Isao Takobe , Keita Itohara , Akihiro Kawano , Hironori Sumitomo
IPC: H02M3/158
Abstract: 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.
-
公开(公告)号：US11550349B2
公开(公告)日：2023-01-10
申请号：US17283389
申请日：2019-10-21
Applicant: ROHM CO., LTD.
Inventor： Isao Takobe , Yuhei Yamaguchi , Yukihiro Watanabe , Shingo Hashiguchi
Abstract: 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.
-
公开(公告)号：US11515788B2
公开(公告)日：2022-11-29
申请号：US16975538
申请日：2019-01-28
Applicant: Rohm Co., Ltd.
Inventor： Shingo Hashiguchi
Abstract: 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.
-
公开(公告)号：US20220321007A1
公开(公告)日：2022-10-06
申请号：US17615931
申请日：2020-06-12
Applicant: ROHM CO., LTD.
Inventor： Kosuke Sato , Tetsuo Tateishi , Shingo Hashiguchi , Isao Takobe , Yuhei Yamaguchi
IPC: H02M3/158 , H02M1/088 , H02M1/32 , B60R16/033
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20210382510A1
公开(公告)日：2021-12-09
申请号：US17283389
申请日：2019-10-21
Applicant: ROHM CO., LTD.
Inventor： Isao Takobe , Yuhei Yamaguchi , Yukihiro WATANABE , Shingo Hashiguchi
Abstract: 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.
-
公开(公告)号：US20200253039A1
公开(公告)日：2020-08-06
申请号：US16855068
申请日：2020-04-22
Applicant: Rohm Co., Ltd.
Inventor： Shingo Hashiguchi , Shoichi HARADA
Abstract: 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.
-
公开(公告)号：US10470295B2
公开(公告)日：2019-11-05
申请号：US15912907
申请日：2018-03-06
Applicant: Rohm Co., Ltd.
Inventor： Shingo Hashiguchi , Shoichi Harada
Abstract: 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.
-
公开(公告)号：US10355589B2
公开(公告)日：2019-07-16
申请号：US15133384
申请日：2016-06-28
Applicant: Rohm Co., Ltd.
Inventor： Tetsuo Tateishi , Yuhei Yamaguchi , Shingo Hashiguchi , Kiyotaka Umemoto
Abstract: 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.
-
公开(公告)号：US10320292B2
公开(公告)日：2019-06-11
申请号：US15849138
申请日：2017-12-20
Applicant: Rohm Co., Ltd.
Inventor： Shun Fukushima , Shingo Hashiguchi , Tetsuo Tateishi
Abstract: A phase compensation circuit, being for compensating phase of a first voltage inputted to a PWM comparator of a DC/DC converter having a sleep mode, includes: a phase compensation resistor part including a resistor; a phase compensation capacitor part including a plurality of capacitors; and a switch group arranged to change over the capacitors, in the sleep mode, to a first connection state in which at least one of the capacitors is charged with a first bias voltage and to change over the capacitors, at cancellation of the sleep mode, to a second connection state in which the first voltage is set to a desired initial value.
-
-
-
-
-
-
-
-
-
Search Results
26
records
(took 0.015 seconds)
