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公开(公告)号：US20200313537A1
公开(公告)日：2020-10-01
申请号：US16900336
申请日：2020-06-12
Applicant: ROHM CO., LTD.
Inventor： Yuta OKAWAUCHI , Yusuke NAKAKOHARA , Ken Nakahara
IPC: H02M1/08 , H02M3/158 , H03K17/687
Abstract: A gate drive circuit, which drives a gate of a first transistor, includes a first switch on a high potential side and a second switch on a low potential side connected in series at a second connection node between a high potential end and a low potential end of a series connection structure, constituted of a first voltage source and a second voltage source connected in series at a first connection node; and a third switch and an inductor connected in series between the first connection node and the second connection node. The gate of the first transistor can be electrically connected to the second connection node.
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公开(公告)号：US20220321018A1
公开(公告)日：2022-10-06
申请号：US17763841
申请日：2020-05-18
Applicant: Rohm Co., Ltd.
Inventor： Yusuke NAKAKOHARA
Abstract: A switching power supply circuit (100XA) includes switching elements (SW31 and SW41), a detector (310) configured to detect a physical quantity (Tout) related to the output power of the switching power supply circuit, and a variable controller (42) configured to variably control the gate driving voltages (G3 and G4) for the switching elements based on the result (Idet) of detection by the detector.
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公开(公告)号：US20220320054A1
公开(公告)日：2022-10-06
申请号：US17596060
申请日：2020-06-19
Applicant: ROHM CO., LTD.
Inventor： Hiroyuki SAKAIRI , Yusuke NAKAKOHARA , Ken NAKAHARA
IPC: H01L25/16 , H01L23/495 , H01L23/00 , H02M1/08 , H02M3/00
Abstract: A semiconductor device includes a conductive member including first, second and third conductors mutually spaced, a first semiconductor element having a first obverse surface provided with a first drain electrode, a first source electrode and a first gate electrode, and a second semiconductor element having a second obverse surface provided with a second drain electrode, a second source electrode and a second gate electrode. The first conductor is electrically connected to the first source electrode and the second drain electrode. The second conductor is electrically connected to the second source electrode. As viewed in a first direction crossing the first obverse surface, the second conductor is adjacent to the first conductor in a second direction crossing the first direction. The third conductor is electrically connected to the first drain electrode and is adjacent to the first conductor and the second conductor as viewed in the first direction.
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公开(公告)号：US20210083563A1
公开(公告)日：2021-03-18
申请号：US16771995
申请日：2018-11-16
Applicant: Rohm Co., Ltd.
Inventor： Yuta OKAWAUCHI , Yusuke NAKAKOHARA , Ken NAKAHARA
IPC: H02M1/08 , H02M3/158 , H03K17/0412
Abstract: A gate drive circuit, which drives a gate of a first transistor, includes a first switch on a high potential side and a second switch on a low potential side connected in series at a second connection node between a high potential end and a low potential end of a series connection structure, constituted of a first voltage source and a second voltage source connected in series at a first connection node; and a third switch and an inductor connected in series between the first connection node and the second connection node. The gate of the first transistor can be electrically connected to the second connection node
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公开(公告)号：US20220190556A1
公开(公告)日：2022-06-16
申请号：US17605457
申请日：2020-04-17
Applicant: ROHM CO., LTD.
Inventor： Satohiro KIGOSHI , Yuki TANUMA , Gen MUTO , Minoru MURAYAMA , Okimoto KONDO , Chikoto IKEDA , Yusuke NAKAKOHARA
IPC: H01S5/042
Abstract: A semiconductor light emitting device includes a substrate, a common conductive portion formed on the substrate, a semiconductor light emitting element mounted on the common conductive portion, and an electronic component mounted on the common conductive portion and electrically connected to the semiconductor light emitting element by the common conductive portion. This structure shortens the conductive path between the semiconductor light emitting element and the electronic component, thereby reducing capacitance caused by the conductive path between the semiconductor light emitting element and the electronic component. Thus, while reducing parasitic capacitance, the semiconductor light emitting element and the electronic component are electrically connected.
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Patent Agency Ranking
公开(公告)号：US20190115851A1
公开(公告)日：2019-04-18
申请号：US16092144
申请日：2017-04-11
Applicant: ROHM CO., LTD.
Inventor： Hirotaka OTAKE , Yusuke NAKAKOHARA , Mamoru TSURUYA
IPC: H02M7/5387 , H01F27/24 , H02M7/5395
Abstract: The alternating-current power supply device 1 has: an alternating-current generation bridge 10 for obtaining an alternating-current output; PWM control bridges 20, 30, each including two switch components; and a coupling reactor 40 connected to the PWM control bridges 20, 30. The coupling reactor 40 includes: a core 43; and windings 41, 42 which are connected at one end to respective output ends of the PWM control bridges 20, 30 while being coupled with each other via the core 43. The windings 41, 42 are respectively wound in such directions that magnetic fluxes generated in the core 43 cancel each other out.
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公开(公告)号：US20170025963A1
公开(公告)日：2017-01-26
申请号：US15303683
申请日：2015-05-18
Applicant: ROHM CO., LTD.
Inventor： Hirotaka OTAKE , Yusuke NAKAKOHARA , Mamoru TSURUYA
CPC classification number: H02M3/33546 , H02M1/08 , H02M1/14 , H02M3/285 , H02M3/337 , H02M2001/0009 , H02M2001/0058 , H02M2001/0064 , Y02B70/1433 , Y02B70/1491
Abstract: A power supply device has resonance-type DC-DC converters of three phases connected in parallel, said converters respectively having operation phases shifted from each other by 120°. The converters include switching circuits, series resonant circuits, and rectifying smoothing circuits, respectively. The series resonant circuits include first transformers, second transformers and resonance capacitors, respectively. Each of primary winding wires of the first transformers, each of primary winding wires of the second transformers, and respective resonance capacitors are connected in series. Each of secondary winding wires of the second transformers is connected to each of the rectifying smoothing circuits. The first transformers are provided with different cores, respectively, the primary winding wires and the secondary winding wires are insulated from each other by means of dividing bobbins, and the secondary winding wires of respective phases are connected in parallel.
Abstract translation: 电源装置具有三相并联连接的谐振型DC-DC转换器，所述转换器分别具有彼此相差120°的操作相位。 转换器分别包括开关电路，串联谐振电路和整流平滑电路。 串联谐振电路分别包括第一变压器，第二变压器和谐振电容器。 第一变压器的初级绕组线，第二变压器的初级绕组线以及相应的谐振电容器分别串联连接。 每个第二变压器的次级绕组线连接到每个整流平滑电路。 第一变压器分别具有不同的磁芯，初级绕组线和次级绕组线通过分隔线轴彼此绝缘，并且各相的次级绕组线并联连接。
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公开(公告)号：US20240355283A1
公开(公告)日：2024-10-24
申请号：US18633664
申请日：2024-04-12
Applicant: ROHM CO., LTD.
Inventor： Yusuke NAKAKOHARA
IPC: G09G3/3233
CPC classification number: G09G3/3233 , G09G2300/0842 , G09G2310/08 , G09G2320/0233
Abstract: A light emitting device includes first to L-th light emitting unit circuits, each of which includes a light emitting element configured to emit light by being supplied with a current, and a capacitor configured to accumulate charges for supply to the light emitting element, a charging switching circuit including first to M-th charging switches and configured to switch between supply and non-supply of a charging current to each capacitor, a light emitting switching circuit including first to N-th light emitting switches and configured to switch between supply and non-supply of the accumulated charges of the capacitor to the light emitting element in each of the light emitting unit circuits, and a control circuit configured to control a state of each of the charging switches and a state of each of the light emitting switches.
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公开(公告)号：US20200067407A1
公开(公告)日：2020-02-27
申请号：US16611815
申请日：2018-05-10
Applicant: Rohm Co., Ltd.
Inventor： Junichi KASHIWAGI , Atsushi Yamaguchi , Yohei MORIYAMA , Yuta OKAWAUCHI , Yusuke NAKAKOHARA , Ken Nakahara
Abstract: A ripple injection circuit equipped with: a capacitor that passes a frequency component of an input voltage or a frequency component of an output voltage and that generates a first ripple voltage having a first ripple component; and an integration circuit that integrates a comparison result signal and that generates a second ripple voltage having a second ripple component. The first ripple component and the second ripple component are added to a feedback voltage.
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10.发明申请公开(公告)号：US20190253047A1
公开(公告)日：2019-08-15
申请号：US16393095
申请日：2019-04-24
Applicant: ROHM CO., LTD.
Inventor： Hirotaka OTAKE , Tatsuya YANAGI , Yusuke NAKAKOHARA
IPC: H03K17/16 , H01L29/78 , H01L23/495 , H01L23/552 , H01L23/10 , H01L29/16 , H03K17/041 , H01L29/66
Abstract: The power circuit includes: a main substrate; a first electrode pattern disposed on the main substrate and connected to a positive-side power terminal P; a second electrode pattern disposed on a main substrate and connected to a negative-side power terminal N; a third electrode pattern disposed on the main substrate and connected to an output terminal O; a first MISFET Q1 of which a first drain is disposed on the first electrode pattern; a second MISFET Q4 of which a second drain is disposed on the third electrode pattern; a first control circuit (DG1) connected between a first gate G1 and a first source S1 of the first MISFET, and configured to control a current path conducted from the first source towards the first gate.
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