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    Method for limiting amplifier input current to avoid low voltage conditions
    14.
    发明授权
    Method for limiting amplifier input current to avoid low voltage conditions 有权

    公开(公告)号：US10231050B2

    公开(公告)日：2019-03-12

    申请号：US15463377

    申请日：2017-03-20

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Roger Serwy ,  Jason W. Lawrence ,  Firas Azrai ,  Jeffrey Allen May

    IPC: H03G11/00 ,  H04R3/00 ,  H03F3/183 ,  H03F3/21 ,  H04R3/04 ,  H04R29/00 ,  H03G3/00 ,  H03G3/30 ,  H03G3/20

    Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of an amplitude of the audio input signal, receive information indicative of a condition of the power supply, receive information indicative of one or more of the following: 1) adaptive estimates of power supply conditions; 2) anticipated effects of power supply capacitance; and 3) condition of a load impedance, determine from the received information whether a brownout condition exists, and responsive to determining the brownout condition exists, generate the selectable attenuation signal to reduce an amplitude of the audio output signal such that the signal path attenuates the audio input signal or a derivative thereof in order to prevent brownout prior to propagation to the audio output of a portion of the audio input signal having the brownout condition.

    Phase interleaving in a multiphase power converter
    15.
    发明授权
    Phase interleaving in a multiphase power converter 有权

    公开(公告)号：US12212241B2

    公开(公告)日：2025-01-28

    申请号：US18061591

    申请日：2022-12-05

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Jason W. Lawrence ,  Graeme G. Mackay

    IPC: H02M3/158 ,  H02M1/15 ,  H02M3/156

    Abstract: A system for generating a plurality of switch control signals of a multiphase power converter may include a plurality of inputs, each input of the plurality of inputs configured to receive a respective control signal for controlling a respective phase of the multiphase power converter, and a plurality of control paths comprising a control path for each respective control signal, each control path configured to, for its respective control signal, control a switching period of the respective control signal for such control path based on a measure of alignment among the respective control signal for such control path and the other respective control signals of the other control paths.

    Current control for a boost converter with dual anti-wound inductor
    18.
    发明授权
    Current control for a boost converter with dual anti-wound inductor 有权

    公开(公告)号：US11695337B2

    公开(公告)日：2023-07-04

    申请号：US17525463

    申请日：2021-11-12

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Jason W. Lawrence ,  John L. Melanson ,  Eric J. King

    IPC: H02M3/155

    CPC classification number: H02M3/155

    Abstract: A system may include a power converter comprising at least one stage having a dual anti-wound inductor having a first winding and a second winding constructed such that its windings generate opposing magnetic fields in its magnetic core and constructed such that a coupling coefficient between the first winding and the second winding is less than approximately 0.95 and a current control subsystem for controlling an electrical current through the dual anti-wound inductor, the current control subsystem configured to minimize a magnitude of a magnetizing electrical current of the dual anti-wound inductor to prevent core saturation of the dual anti-wound inductor and regulate an amount of output electrical current delivered by the power converter to the load in accordance with a reference input signal.

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