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公开(公告)号：US20190190512A1
公开(公告)日：2019-06-20
申请号：US16218724
申请日：2018-12-13
Applicant: Rohm Co., Ltd.
Inventor： Toru TAKUMA
CPC classification number: H03K17/0828 , B60R16/03 , G01K7/16 , H02H3/08 , H02H5/04 , H02H6/00 , H02M3/156 , H03K17/168
Abstract: A switch device includes a switching element that connects/disconnects a current path from a power supply terminal to a ground terminal via a load, and an overcurrent protection circuit that limits output current flowing in the switching element to be an overcurrent limit value or less. When an output short circuit of the load is detected, the overcurrent protection circuit decreases the overcurrent limit value to be lower as a power supply voltage is higher. In addition, the switch device preferably includes a switching element that connects/disconnects a current path from a power supply terminal to a ground terminal via a load, an intermittent control unit that intermittently drives the switching element when an abnormality is detected, and an output voltage monitoring portion that disables the intermittent control unit until an output voltage applied to the load reaches its target value.
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公开(公告)号：US20170041994A1
公开(公告)日：2017-02-09
申请号：US15219618
申请日：2016-07-26
Applicant: ROHM CO., LTD.
Inventor： Koji KATSURA , Toru TAKUMA , Yasunori MURAMATSU
IPC: H05B33/08 , H03K3/0233 , H05B37/02 , H03K7/08
CPC classification number: H05B33/0815 , H03K3/02337 , H03K7/08 , H05B33/0845 , H05B33/0884 , H05B37/0281
Abstract: An oscillation circuit for generating a clock signal of a switching power supply circuit is provided. The oscillation circuit includes a circuit configured to perform frequency spreading control of the clock signal in synchronization with an output operation control signal for periodically turning on/off an output operation of the switching power supply circuit.
Abstract translation: 提供了一种用于产生开关电源电路的时钟信号的振荡电路。 振荡电路包括与用于周期性地接通/关断开关电源电路的输出操作的输出操作控制信号同步地执行时钟信号的频率扩展控制的电路。
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公开(公告)号：US20250055275A1
公开(公告)日：2025-02-13
申请号：US18792110
申请日：2024-08-01
Applicant: ROHM CO., LTD.
Inventor： Katsuaki YAMADA , Toru TAKUMA , Shuntaro TAKAHASHI
IPC: H02H9/02
Abstract: An overcurrent protection circuit that limits a current to be monitored based on a current limit signal includes: a first transistor and a second transistor configured to form an amplifier input stage that receives input of a detection signal according to the current to be monitored; a third transistor configured to generate a current output signal according to a difference between the detection signal and a reference signal, and configured to form an amplifier output stage that inputs the current output signal as a negative feedback to the amplifier input stage; and a current mirror circuit configured to generate the current limit signal by replicating a signal based on the current output signal.
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公开(公告)号：US20240429697A1
公开(公告)日：2024-12-26
申请号：US18822935
申请日：2024-09-03
Applicant: ROHM CO., LTD.
Inventor： Mark Puno BUENAVIDEZ , Joita ADRIAN , Toru TAKUMA
Abstract: An overcurrent protection circuit, for example, comprises: an overcurrent detection unit configured to compare monitoring target current and an overcurrent detection threshold value; a current interruption unit configured to interrupt the monitoring target current when the monitoring target current reaches the overcurrent detection threshold value; an interruption cancellation unit configured to cancel the interruption of the monitoring target current at the elapse of a first time after the monitoring target current has reached the overcurrent detection threshold value; and a threshold control unit configured to lower the overcurrent detection threshold value at the elapse of the first time after the monitoring target current has reached the overcurrent detection threshold value.
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公开(公告)号：US20240105834A1
公开(公告)日：2024-03-28
申请号：US18466322
申请日：2023-09-13
Applicant: ROHM CO., LTD.
Inventor： Hajime OKUDA , Yoshinori FUKUDA , Adrian JOITA , Toru TAKUMA
IPC: H01L29/78 , H01L27/06 , H01L29/06 , H01L29/423
CPC classification number: H01L29/7813 , H01L27/0629 , H01L29/0607 , H01L29/42368 , H01L29/42376
Abstract: A semiconductor device includes: a semiconductor region of a first conductivity type having a main surface; a capacitor region of a second conductivity type formed in a surface layer portion of the main surface; and at least one trench structure including a trench formed in the main surface to penetrate the capacitor region, an insulating film covering a wall surface of the trench, and embedded electrodes embedded in the trench so as to form capacitive coupling with the capacitor region through the insulating film.
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Patent Agency Ranking
公开(公告)号：US20240088886A1
公开(公告)日：2024-03-14
申请号：US18263404
申请日：2021-11-29
Applicant: Rohm Co., Ltd.
Inventor： Makoto SADA , Toru TAKUMA , Shuntaro TAKAHASHI
IPC: H03K17/0814 , H01L27/06 , H01L29/06 , H01L29/78
CPC classification number: H03K17/08142 , H01L27/0629 , H01L29/0696 , H01L29/7808 , H01L29/7813
Abstract: A semiconductor device 1 includes: a split-gate transistor 9 connected between a drain electrode 11 (output electrode OUT) and a ground electrode and having a plurality of individually controllable channel regions; an active clamp circuit 26 configured to limit the output voltage VOUT appearing at the output electrode 11 to a clamp voltage or below; and a gate control circuit 25 configured to raise the ON resistance of the split-gate transistor 9 gently (or stepwise) after the split-gate transistor is switched from the ON state to the OFF state before the active clamp circuit 26 limits the output voltage VOUT.
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公开(公告)号：US20230378018A1
公开(公告)日：2023-11-23
申请号：US18317632
申请日：2023-05-15
Applicant: ROHM CO., LTD.
Inventor： Hajime OKUDA , Yuto NISHIYAMA , Toru TAKUMA , Katsuaki YAMADA
IPC: H01L23/367 , H01L23/00
CPC classification number: H01L23/367 , H01L24/05 , H01L24/48 , H01L24/49 , H01L24/06 , H01L24/32 , H01L24/29 , H01L24/45 , H01L24/73 , H01L2224/05647 , H01L2224/05666 , H01L2224/05655 , H01L2224/05644 , H01L2224/05639 , H01L2224/05624 , H01L2224/05638 , H01L2924/01014 , H01L2224/06181 , H01L2224/05552 , H01L2224/29144 , H01L2224/29139 , H01L2224/29147 , H01L2224/32245 , H01L2224/45147 , H01L2224/45124 , H01L2224/45144 , H01L2224/45139 , H01L2224/45655 , H01L2224/45664 , H01L2224/45644 , H01L2224/48091 , H01L2224/48108 , H01L2224/48245 , H01L2224/48451 , H01L2224/4846 , H01L2224/48465 , H01L2224/49171 , H01L2224/49175 , H01L2224/48101 , H01L2224/4901 , H01L2224/49111 , H01L2224/49112 , H01L2224/48137 , H01L2224/73265 , H01L2224/73215 , H01L2224/32145 , H01L2224/48145 , H01L2224/4945 , H01L23/49513
Abstract: A semiconductor device includes: a substrate; a device region provided in the substrate; a terminal covering the device region in a plan view; a plurality of pseudo-bumps densely arranged on the terminal in a state of being opened from a wire; and at least one genuine bump arranged more sparsely than the plurality of the pseudo-bumps on the terminal in a state of being connected to the wire.
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公开(公告)号：US20230223746A1
公开(公告)日：2023-07-13
申请号：US18151538
申请日：2023-01-09
Applicant: ROHM Co., LTD.
Inventor： Adrian Joita , Toru TAKUMA , Shuntaro Takahashi
Abstract: Disclosed herein is a clamper including a current source that is connected between an external electrode and an internal node and generates a predetermined constant current, a diode having an anode connected to the internal node, and a current mirror that generates a second current corresponding to a first current flowing via the diode and draws the second current from the internal node to a reference voltage node.
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公开(公告)号：US20230170893A1
公开(公告)日：2023-06-01
申请号：US18154138
申请日：2023-01-13
Applicant: ROHM Co., LTD.
Inventor： Toru TAKUMA
IPC: H03K17/082 , H02H9/02
CPC classification number: H03K17/0822 , H02H9/025 , B60R16/02
Abstract: Disclosed herein is an overcurrent protection circuit configured to, upon detection of an output current that flows through a switch element reaching a first overcurrent limit value, reduce an overcurrent limit value for the output current from the first overcurrent limit value to a second overcurrent limit value smaller than the first overcurrent limit value.
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公开(公告)号：US20180048140A1
公开(公告)日：2018-02-15
申请号：US15672958
申请日：2017-08-09
Applicant: Rohm Co., Ltd.
Inventor： Toru TAKUMA , Shuntaro TAKAHASHI , Naoki TAKAHASHI
CPC classification number: H02H3/08 , B60R16/02 , G05F1/573 , G06F1/305 , H02H9/02 , H02H9/025 , H03K19/00315
Abstract: An overcurrent protection circuit includes a current control part configured to control conductance of a transistor so as to limit an output current flowing when the transistor is turned on to a predetermined upper limit or less, and a duty control part configured to forcibly turning on/off the transistor at a predetermined duty ratio when a temperature protection circuit detects a temperature abnormality in a state where the current control part limits the output current.
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