公开(公告)号：US20220037989A1

公开(公告)日：2022-02-03

申请号：US17171815

申请日：2021-02-09

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ajit SHARMA ,  Jason W. LAWRENCE ,  Graeme G. MACKAY

IPC: H02M1/32 ,  H02M7/00

Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry configured to control the power converter in accordance with a control variable. The control circuitry may include a first control mechanism configured to generate a first intermediate control variable based on a first physical quantity associated with the power delivery system, a second control mechanism configured to generate a second intermediate control variable based on a second physical quantity associated with the power delivery system, a selector configured to select the control variable from the first intermediate control variable and the second intermediate control variable, and a shared feedback memory element configured to feed back the control variable to inputs of the first control mechanism and the second control mechanism, such that the first control mechanism generates the first intermediate control variable based on the first physical quantity and the control variable, and the second control mechanism generates the second intermediate control variable based on the second physical quantity and the control variable.

公开(公告)号：US20220029538A1

公开(公告)日：2022-01-27

申请号：US17152053

申请日：2021-01-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jason W. LAWRENCE ,  Graeme G. MACKAY ,  Sakkarapani BALAGOPAL

IPC: H02M3/158 ,  G01R19/165 ,  H03K5/24

Abstract: A method for controlling a current associated with a power converter may comprise controlling the current based on at least a peak current threshold level for the current and a valley current threshold level for the current, and further controlling the current based on a duration of time that the power converter spends in a switching state of the power converter.

公开(公告)号：US20220029537A1

公开(公告)日：2022-01-27

申请号：US17149338

申请日：2021-01-14

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jason W. LAWRENCE ,  Graeme G. MACKAY ,  Theodore M. BURK ,  Sakkarapani BALAGOPAL

IPC: H02M3/158

Abstract: In accordance with embodiments of the present disclosure, a power conversion system may include a power converter configured to receive an input voltage and generate an output voltage, a bypass switch arranged in parallel with the power converter and arranged to couple the input voltage to the output voltage when the bypass switch is activated, and a control circuit configured to control the power converter and the bypass switch based on the output voltage.

公开(公告)号：US20210367515A1

公开(公告)日：2021-11-25

申请号：US17119579

申请日：2020-12-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Graeme G. MACKAY ,  Jason W. LAWRENCE

IPC: H02M3/157 ,  H02M3/158

Abstract: A system may include a power converter configured to receive an input voltage and generate an output voltage and a controller configured to control operation of the power converter based on a comparison of a current associated with the power converter to a threshold current and control the threshold current as a function of the input voltage.

公开(公告)号：US20210367510A1

公开(公告)日：2021-11-25

申请号：US17119517

申请日：2020-12-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jason W. LAWRENCE ,  Eric J. KING ,  Graeme G. MACKAY ,  Theodore M. BURK

IPC: H02M3/04 ,  H02M1/00

Abstract: A system for controlling a current in a power converter may include an outer control loop configured to use an outer set of output voltage thresholds for an output voltage generated by the power converter in order to provide hysteretic control of the current, an inner control loop configured to use an inner set of output voltage thresholds for the output voltage in order to provide continuous control of the current, the inner control loop further configured to measure a time duration required for the output voltage to cross a single pair of two output voltage thresholds of the inner set of output voltage thresholds in order to determine an input-referred estimate of a current load of the power converter and set a peak current threshold and a valley current threshold for the current based on the input-referred estimate of the current load.

公开(公告)号：US20170359652A1

公开(公告)日：2017-12-14

申请号：US15463377

申请日：2017-03-20

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Roger SERWY ,  Jason W. LAWRENCE ,  Firas AZRAI

IPC: H04R3/00 ,  H03F3/21 ,  H04R29/00 ,  H04R3/04 ,  H03F3/183

CPC classification number: H04R3/007 ,  H03F3/183 ,  H03F3/21 ,  H03F2200/03 ,  H03F2200/102 ,  H03G3/007 ,  H03G3/301 ,  H04R3/04 ,  H04R29/001

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.