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    POWER MANAGEMENT INTEGRATED CIRCUIT FOR HARVESTING ENERGY AND ENERGY HARVESTING SYSTEM INCLUDING THE SAME
    2.
    发明申请
    POWER MANAGEMENT INTEGRATED CIRCUIT FOR HARVESTING ENERGY AND ENERGY HARVESTING SYSTEM INCLUDING THE SAME 有权

    公开(公告)号：US20230029579A1

    公开(公告)日：2023-02-02

    申请号：US17729756

    申请日：2022-04-26

    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Sang-Gug Lee ,  Young-Seok Noh ,  Jeong-Il Seo ,  Won-Jong Choi

    IPC: H01L35/28 ,  H02J7/00

    Abstract: A power management integrated circuit includes a reconfigurable converter connected to a rechargeable battery and a control circuit. The reconfigurable converter includes an indcutor to accumulate energy based on an input voltage from a thermoelectric device, provides a wireless sensor node connected to an output node with an output voltage based on the input voltage and an internal input voltage of the rechargeable battery, operates in one of operation modes based on an available power provided from the thermoelectric device and a power consumption by the wireless sensor node and drives the wireless sensor node in response to the wireless sensor node consuming a current greater than a maximum current generated by the thermoelectric device. The control circuit to control the reconfigurable converter based on the input voltage, a first voltage of a first switching node, a second voltage of a second switching node and the output voltage.

    Current mode hysteretic buck converter with auto-selectable frequency locking circuit
    3.
    发明授权
    Current mode hysteretic buck converter with auto-selectable frequency locking circuit 有权

    公开(公告)号：US10199917B2

    公开(公告)日：2019-02-05

    申请号：US15690670

    申请日：2017-08-30

    Applicant: Korea Advanced Institute of Science and Technology

    Inventor： Sang-Gug Lee ,  Jeong-Il Seo ,  Baek-Min Lim

    IPC: H02M1/08 ,  H02M1/14 ,  H02M3/156 ,  H02M1/00

    Abstract: A current mode hysteretic buck converter employing an auto-selectable frequency locking circuit is disclosed. The auto-selectable frequency locking type buck converter include a current mode hysteretic buck converter for converting an input DC voltage into a lower DC voltage, and a frequency locking unit for locking a switching frequency of the current mode hysteretic buck converter wherein the switching frequency is locked through adjusting a locking value of the switching frequency to be a predetermined value according to a size of a load. The buck converter is, based on the current mode hysteretic control, related to a circuit that locks the switching frequency of the converter to reduce the difficulty of designing electromagnetic interference (EMI) filters in the converter. In addition, the buck converter can improve the efficiency at light load by adjusting the switching frequency which is locked according to the load current.

    Power management device for energy harvesting
    4.
    发明授权
    Power management device for energy harvesting 有权

    公开(公告)号：US09923453B1

    公开(公告)日：2018-03-20

    申请号：US15603815

    申请日：2017-05-24

    Applicant: Korea Advanced Institute of Science and Technology

    Inventor： Sang-Gug Lee ,  Baek-Min Lim ,  Jeong-Il Seo ,  Young-Seok Noh ,  Hyun-Mo Gu

    IPC: H02M3/158 ,  H02M1/36 ,  H01L35/02

    CPC classification number: H02M1/36 ,  H01L35/02 ,  H02J7/0052 ,  H02M3/158

    Abstract: A power management device according to example embodiments includes a self-startup circuit including an oscillator and a voltage multiplier to generate a start-up voltage in a first start-up period based on an input voltage, a boost converter to alternately charge the start-up voltage and an output voltage within a start-up voltage range during a second start-up period and to charge only the output voltage during an operation period, a controller to control the self-startup circuit and the boost converter based on a magnitude of the start-up voltage, a voltage charger including a start-up voltage capacitor and an output voltage capacitor, and a shared inductor connected between the input node and a common input node. The shared inductor operates as a part of the oscillator during the first start-up period and a part of the boost converter during the second start-up and operation periods.

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