公开(公告)号：US20170373600A1

公开(公告)日：2017-12-28

申请号：US15190819

申请日：2016-06-23

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Xiangcheng WANG ,  Eric J. KING

IPC: H02M3/158 ,  H04R3/04 ,  H02M1/08

CPC classification number: H02M3/1582 ,  H02M1/08 ,  H02M3/155 ,  H02M2001/0054 ,  H03F1/0227 ,  H03F3/181 ,  H03F2200/03 ,  H03F2200/102 ,  H04R1/1016 ,  H04R1/1041 ,  H04R3/00 ,  H04R3/04 ,  Y02B70/1491

Abstract: In accordance with embodiments of the present disclosure, a multi-mode switching power converter may include a power inductor, a first switch coupled between a first terminal of the power inductor and a first supply terminal having a first voltage, a second switch coupled between the first terminal of the power inductor and a second supply terminal having a second voltage, a full bridge comprising a plurality of switches and having an output for producing the output voltage comprising a first output terminal and a second output terminal, wherein a first input of the full bridge is coupled to a second terminal of the power inductor and a second input of the full bridge is coupled to one of the first supply terminal and the second supply terminal, and a capacitor coupled between the first output terminal and the second output terminal.

公开(公告)号：US20170346446A1

公开(公告)日：2017-11-30

申请号：US15582861

申请日：2017-05-01

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jeffrey Allen MAY ,  Eric J. KING ,  Firas AZRAI

IPC: H03F1/02 ,  H03F3/187

Abstract: In accordance with embodiments of the present disclosure, a system may include a circuit having a power converter and an amplifier, wherein the power converter is configured to generate an intermediate voltage, provide the intermediate voltage as an amplifier supply voltage to the amplifier, and share the intermediate voltage with one or more additional circuits external to the circuit, wherein at least one of the one or more additional circuits is configured to generate the intermediate voltage.

公开(公告)号：US20170271996A1

公开(公告)日：2017-09-21

申请号：US15282790

申请日：2016-09-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Zhaohui HE ,  Siddharth MARU ,  John L. MELANSON

IPC: H02M5/293

CPC classification number: H03F3/2171 ,  H02M5/293 ,  H02M2005/2932 ,  H03F1/0216 ,  H03F1/0227 ,  H03F1/32 ,  H03F3/185 ,  H03F3/2173 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/153 ,  H03F2200/432 ,  H04R3/12

Abstract: A method may include controlling switches of a switching full-bridge of a signal processing system to commutate polarity of a capacitor with respect to the first processing path output and a second processing path output of the signal processing system in response to a condition for commutating connectivity of the switching full-bridge and inserting a feedforward compensation that bypasses a loop filter of the second processing path in order to prevent discontinuities caused by commutating polarity of the capacitor from being compensated by the loop filter.

公开(公告)号：US20240136930A1

公开(公告)日：2024-04-25

申请号：US18455253

申请日：2023-08-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  Emmanuel A. MARCHAIS ,  Eric J. KING ,  John L. MELANSON

IPC: H02M3/158 ,  G01R31/374 ,  G01R31/3842

CPC classification number: H02M3/1582 ,  G01R31/374 ,  G01R31/3842

Abstract: A method for intelligently generating a stimulus for use in characterization of parameters of a model of a battery may include dynamically analyzing a current drawn from the battery by a load, based on analysis of the current, determining an augmented current for augmenting the current drawn by the load, and generating the augmented current based on a determined need to update the parameters.

公开(公告)号：US20240133957A1

公开(公告)日：2024-04-25

申请号：US18308449

申请日：2023-04-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  Emmanuel A. MARCHAIS ,  Eric J. KING

IPC: G01R31/367 ,  G01R31/3842 ,  G01R31/389

CPC classification number: G01R31/367 ,  G01R31/3842 ,  G01R31/389

Abstract: A method for estimating equivalent circuit model parameters of a battery may include measuring a battery voltage across terminals of the battery and a battery current drawn from the battery, decomposing the battery voltage and the battery current into a plurality of sub-bands, each sub-band of the plurality of sub-bands based on a time constant that characterizes a temporal behavior of the battery, for each sub-band of the plurality of sub-bands, estimating an equivalent resistance for such sub-band based on a spectral content of the battery voltage and battery current for such sub-band, and estimating an open circuit voltage of the battery based at least on the spectral content of the battery voltage and battery current present in one of the plurality of sub-bands and the equivalent resistances of the plurality of sub-bands.

公开(公告)号：US20240072559A1

公开(公告)日：2024-02-29

申请号：US18503830

申请日：2023-11-07

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ivan PERRY ,  Hasnain AKRAM ,  Eric J. KING

IPC: H02J7/00

CPC classification number: H02J7/0068 ,  H02J7/0063 ,  H02J2207/20 ,  H02J2310/22

Abstract: A power management system for use in a device comprising a battery and one or more components configured to draw electrical energy from the battery may include a first power converter configured to electrically couple between charging circuitry configured to provide electrical energy for charging the battery and the one or more downstream components and a bidirectional power converter configured to electrically couple between the charging circuitry and the battery, wherein the bidirectional power converter is configured to transfer charge from the battery or transfer charge from the battery based on a power requirement of the one or more components and a power available from the first power converter.

公开(公告)号：US20220376618A1

公开(公告)日：2022-11-24

申请号：US17678527

申请日：2022-02-23

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Yongjie CHENG ,  Lingli ZHANG ,  John L. MELANSON ,  Thomas H. HOFF ,  Eric J. KING ,  Zhaohui HE

IPC: H02M3/07 ,  H02M1/00 ,  H03F3/217 ,  H04R3/00

Abstract: This application relates to methods and apparatus for driving a transducer. A transducer driver has a switch network is operable to selectively connect a driver output to any of a first set of at least three different switching voltages. which are, in use, maintained throughout a switching cycle of the driver apparatus. The switch network is also operable to selectively connect the driver output to flying capacitor driver. A controller is configured to control the switch network and flying capacitor driver to generate a drive signal at the driver output based on an input signal, wherein in one mode of operation the driver output is switched between two of the first set of switching voltages with a controlled duty cycle and in another mode of operation the driver output is connected to the flying capacitor driver which is switched between first and second states with a controlled duty cycle.

公开(公告)号：US20220368325A1

公开(公告)日：2022-11-17

申请号：US17874357

申请日：2022-07-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Axel THOMSEN ,  Eric J. KING ,  Thomas H. HOFF ,  John L. MELANSON ,  Angus BLACK ,  Ross C. MORGAN ,  Malcolm BLYTH

IPC: H03K17/687 ,  H02N2/00 ,  H02M3/158

Abstract: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.

公开(公告)号：US20220320999A1

公开(公告)日：2022-10-06

申请号：US17220641

申请日：2021-04-01

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Emmanuel MARCHAIS ,  Ross C. MORGAN ,  Ivan PERRY ,  Eric J. KING

IPC: H02M3/04 ,  H02J7/00

Abstract: A power delivery system may include an inductive power converter comprising a shared connection to a shared voltage from a battery, multiple inductive phases, each of the multiple inductive phases configured to generate a respective voltage from the shared voltage, multiple regulated voltage connections, and one or more switches configured and arranged to selectively assign at least one of the multiple inductive phases to a regulated voltage connection selected from the multiple regulated voltage connections.

公开(公告)号：US20220263519A1

公开(公告)日：2022-08-18

申请号：US17667953

申请日：2022-02-09

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John L. MELANSON ,  Axel THOMSEN ,  Mucahit KOZAK ,  Paul WILSON ,  Eric J. KING

IPC: H03M3/00

Abstract: A signal processing system may include a sensor readout channel configured to convert an electronic signal into a digital quantity. The sensor readout channel may include a first-order sigma-delta modulator having a modulator input and a modulator output, first outside chopping switches located at the modulator input, second outside chopping switches located at the modulator output, an auxiliary path comprising an analog-to-digital converter (ADC) having an auxiliary path input and an auxiliary path output, the auxiliary path input configured to receive as its input signal a signal output by a memory element of the first-order sigma-delta modulator, and a signal combiner configured to combine a modulator output signal generated by the first-order sigma-delta modulator with an auxiliary path output signal generated by the auxiliary path to generate a combined output signal.