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    POWER CONTROL DEVICE
    1.
    发明申请
    POWER CONTROL DEVICE 有权

    公开(公告)号：US20230137190A1

    公开(公告)日：2023-05-04

    申请号：US18091507

    申请日：2022-12-30

    Applicant: Rohm Co., Ltd.

    Inventor： Kenichi OKAJIMA

    IPC: H02H7/12 ,  H02H1/00 ,  G05F1/595 ,  H02M1/088 ,  G05F1/575 ,  G05F1/571 ,  H02M3/158 ,  H02H3/20 ,  H02M1/36

    Abstract: A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

    POWER SUPPLY CONTROL DEVICE AND POWER SUPPLY DEVICE
    2.
    发明申请
    POWER SUPPLY CONTROL DEVICE AND POWER SUPPLY DEVICE 有权

    公开(公告)号：US20250070670A1

    公开(公告)日：2025-02-27

    申请号：US18812745

    申请日：2024-08-22

    Applicant: ROHM CO., LTD.

    Inventor： Kenichi OKAJIMA

    IPC: H02M3/158 ,  H02H3/20 ,  H02M1/36

    Abstract: A power supply control device includes a feedback terminal, a feedback control circuit, and a terminal inspection circuit. The feedback control circuit is configured to control an output stage of a power supply device according to a feedback voltage applied to the feedback terminal. The terminal inspection circuit is configured to forcibly stop driving the output stage when it is detected that the feedback voltage is lower than a first threshold and an output current flowing through the output stage is higher than a second threshold during a first period at start-up, or when it is detected that the feedback voltage is lower than the first threshold at completion of the first period.

    POWER CONTROL DEVICE
    3.
    发明申请
    POWER CONTROL DEVICE 审中-公开

    公开(公告)号：US20190199083A1

    公开(公告)日：2019-06-27

    申请号：US16287713

    申请日：2019-02-27

    Applicant: Rohm Co., Ltd.

    Inventor： Kenichi OKAJIMA

    IPC: H02H7/12 ,  H02M1/088 ,  G05F1/575 ,  G05F1/595 ,  H02H1/00 ,  H02H3/20 ,  G05F1/571 ,  H02M3/158

    Abstract: A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

    POWER CONTROL DEVICE
    5.
    发明申请
    POWER CONTROL DEVICE 有权

    公开(公告)号：US20220094154A1

    公开(公告)日：2022-03-24

    申请号：US17542695

    申请日：2021-12-06

    Applicant: Rohm Co., Ltd.

    Inventor： Kenichi OKAJIMA

    IPC: H02H7/12 ,  H02H1/00 ,  G05F1/595 ,  H02M1/088 ,  G05F1/575 ,  G05F1/571 ,  H02M3/158 ,  H02H3/20 ,  H02M1/36

    Abstract: A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

    POWER CONTROL DEVICE
    6.
    发明申请
    POWER CONTROL DEVICE 审中-公开

    公开(公告)号：US20200313422A1

    公开(公告)日：2020-10-01

    申请号：US16900495

    申请日：2020-06-12

    Applicant: Rohm Co., Ltd.

    Inventor： Kenichi OKAJIMA

    IPC: H02H7/12 ,  H02H1/00 ,  G05F1/595 ,  H02M1/088 ,  G05F1/575 ,  G05F1/571 ,  H02M3/158 ,  H02H3/20 ,  H02M1/36

    Abstract: A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

    LINEAR REGULATOR, SEMICONDUCTOR DEVICE, AND SWITCHING POWER SUPPLY
    7.
    发明申请
    LINEAR REGULATOR, SEMICONDUCTOR DEVICE, AND SWITCHING POWER SUPPLY 有权

    公开(公告)号：US20250060770A1

    公开(公告)日：2025-02-20

    申请号：US18937282

    申请日：2024-11-05

    Applicant: ROHM CO., LTD.

    Inventor： Kenichi OKAJIMA

    IPC: G05F1/575 ,  H02M3/158

    Abstract: A linear regulator includes: a first transistor of an N-channel type configured to be connected between an application terminal for an input terminal and an application terminal for a stabilized voltage; a second transistor of an N-channel type configure to, by forming a current mirror type output stage with the first transistor, generate an output current flowing in the first transistor by mirroring a bias current flowing in the second transistor itself; a feedback controller circuit configured to control the bias current according to the difference between a feedback voltage corresponding to the stabilized voltage and a predetermined reference voltage; and a load configured to draw a first leakage current from a control terminal common to the first and second transistors.

    SEMICONDUCTOR DEVICE AND SWITCHING POWER SUPPLY
    8.
    发明申请
    SEMICONDUCTOR DEVICE AND SWITCHING POWER SUPPLY 有权

    公开(公告)号：US20250055375A1

    公开(公告)日：2025-02-13

    申请号：US18932128

    申请日：2024-10-30

    Applicant: ROHM CO., LTD.

    Inventor： Kenichi OKAJIMA

    IPC: H02M3/158 ,  H02M1/08

    Abstract: A semiconductor device includes: a first driver that drives an output element constituting a switching output stage; at least a part of a bootstrap circuit that generates a boot voltage higher than a switching voltage output from the switching output stage and feed the boot voltage to the first driver; and a boot voltage detection circuit that charges the boot voltage on sensing, with the output element off, the difference between the boot voltage and the switching voltage becoming lower than a lower-limit detection value. The boot voltage detection circuit senses the boot voltage through resistance voltage division if a rectification element constituting together with the output element the switching output stage is on, and senses the boot voltage through capacitance voltage division if the rectification element is off.

    LEVEL-SHIFT CIRCUIT AND POWER SUPPLY
    10.
    发明公开
    LEVEL-SHIFT CIRCUIT AND POWER SUPPLY 审中-公开

    公开(公告)号：US20230412172A1

    公开(公告)日：2023-12-21

    申请号：US18036518

    申请日：2021-11-10

    Applicant: Rohm Co., Ltd.

    Inventor： Kenichi OKAJIMA

    IPC: H03K19/0185 ,  H03K17/687 ,  H02M3/158 ,  H02M1/08

    CPC classification number: H03K19/018521 ,  H03K17/687 ,  H02M3/158 ,  H02M1/08

    Abstract: A level-shift circuit includes a first and a second input transistor configured to turn on and off complementarily according to a control signal, a first and a second switch configured, when on, to feed currents to the first and second input transistors respectively, a first and a second clamp element connected between the first and second input transistors and the first and second switches respectively, an output signal generator configured to generate an output signal resulting from level shifting of the control signal based on switching on and off of the currents supplied from the first and second switches to the first and second input transistors respectively, and a first and a second current regulator configured to regulate the current values of the currents flowing through the first and second switches, respectively, based on a first and a second feedback signal fed back from the output signal generator.

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