公开(公告)号：US20180309361A1

公开(公告)日：2018-10-25

申请号：US15497010

申请日：2017-04-25

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jingjing YU ,  Christian LARSEN

IPC: H02M3/02 ,  H03K19/0185 ,  H02M7/538

CPC classification number: H02M3/02 ,  H02M1/08 ,  H02M3/158 ,  H02M7/538 ,  H02M2001/0006 ,  H02M2001/0032 ,  H02M2003/1552 ,  H03K19/018514 ,  Y02B70/16

Abstract: In accordance with embodiments of the present disclosure, a system for power conversion may include a power converter comprising a power inductor and a switch coupled to the power inductor and a predriver system for electrically driving a gate of the switch, the predriver system configured to operate in a plurality of modes including a high-power mode in which the predriver system is supplied with electrical energy from a first power supply having a first supply voltage and a low-power mode in which the predriver system is supplied with electrical energy from a second power supply having a second supply voltage significantly lesser than the first supply voltage.

公开(公告)号：US20180120884A1

公开(公告)日：2018-05-03

申请号：US15800743

申请日：2017-11-01

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Christian LARSEN ,  Aaron J. BRENNAN

IPC: G05F1/573 ,  H02M1/32 ,  F04D15/00 ,  H03F3/217 ,  H03K17/16

CPC classification number: G05F1/5735 ,  F04D15/0027 ,  H02M1/32 ,  H02M3/07 ,  H03F1/025 ,  H03F3/2171 ,  H03F3/72 ,  H03K17/167

Abstract: A method of increasing a multiplication ratio of a charge pump, the multiplication ratio defining a relationship between an output voltage of the charge pump and an input voltage of the charge pump, comprising: analyzing a first efficiency of the charge pump when the multiplication ratio is at a first ratio, calculating a second efficiency of the charge pump when the multiplication ratio is a second ratio lesser than the first ratio, and based on the first efficiency and the second efficiency, determining at least one of a target output power and a target output voltage at which to change the multiplication ratio from the second ratio to the first ratio.

公开(公告)号：US20230208303A1

公开(公告)日：2023-06-29

申请号：US18174106

申请日：2023-02-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Ajit SHARMA ,  Lingli ZHANG ,  Christian LARSEN ,  Graeme G. MACKAY

IPC: H02M3/158 ,  H02M1/08

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M3/1584 ,  H02M1/008

Abstract: A system may include a power converter having a maximum allowable input power drawn from a power source, an energy storage element coupled to an output of the power converter at a top plate of the energy storage element, wherein the energy storage element is configured to store excess energy, and control circuitry configured to, when an input power of the power converter exceeds the maximum allowable input power, cause excess energy stored in the energy storage element to be consumed by circuitry coupled to the output of the power converter, and in order to maintain positive voltage headroom for the circuitry coupled to the output of the power converter, selectively couple a bottom plate of the energy storage element to the power source such that excess energy stored by the circuitry coupled to the output of the power converter is consumed from the energy storage device when the input power of the power converter exceeds the maximum allowable input power.

公开(公告)号：US20210364560A1

公开(公告)日：2021-11-25

申请号：US17118330

申请日：2020-12-10

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Kathryn R. HOLLAND ,  Bo-Ren WANG ,  Ravi K. KUMMARAGUNTLA ,  Graeme G. MACKAY ,  Christian LARSEN

IPC: G01R27/02 ,  H01C1/14 ,  H01C1/16 ,  H01C17/00

Abstract: An apparatus may include a sense resistor comprising a plurality of parallel-coupled resistor elements, a plurality of positive voltage sense points, and a plurality of negative voltage sense points. A first passive combination network may be configured to combine the plurality of positive voltage sense points into a single positive sense terminal and a second passive combination network may be configured to combine the plurality of negative voltage sense points into a single negative sense terminal. The first passive combination network and the second passive combination network may be arranged such that a sense voltage is measurable between the single positive sense terminal and the single negative sense terminal and a dependence of the sense voltage on a variation in current density in the parallel-coupled resistor elements is minimized.

公开(公告)号：US20210083578A1

公开(公告)日：2021-03-18

申请号：US16916395

申请日：2020-06-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Ajit SHARMA ,  Lingli ZHANG ,  Christian LARSEN ,  Graeme G. MACKAY

IPC: H02M3/158 ,  H02M1/08 ,  H04R3/00

Abstract: A system may include a power converter having a maximum allowable input power drawn from a power source, an energy storage element coupled to an output of the power converter at a top plate of the energy storage element, wherein the energy storage element is configured to store excess energy, and control circuity configured to, when an input power of the power converter exceeds the maximum allowable input power, cause excess energy stored in the energy storage element to be consumed by circuitry coupled to the output of the power converter, and in order to maintain positive voltage headroom for the circuitry coupled to the output of the power converter, selectively couple a bottom plate of the energy storage element to the power source such that excess energy stored by the circuitry coupled to the output of the power converter is consumed from the energy storage device when the input power of the power converter exceeds the maximum allowable input power.

公开(公告)号：US20200235712A1

公开(公告)日：2020-07-23

申请号：US16745511

申请日：2020-01-17

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jeffrey A. MAY ,  Eric J. KING ,  Christian LARSEN ,  Eric EKLUND

IPC: H03G3/00 ,  H02M3/04 ,  H03G3/30 ,  H03F3/20 ,  H04R3/00

Abstract: A power converter may include an input for receiving an input signal and output for generating an intermediate signal that is a power converted signal from the input signal wherein the intermediate signal is determined based on various parameters of a signal path that utilizes the intermediate signal, wherein the various parameters comprise one or more of the following: a peak output signal of the signal path, energy requested over a period of time by the signal path, available energy from an energy source to the power converter, stored energy at an output of the power converter, and stored energy of a battery for providing electrical energy at the input.

公开(公告)号：US20180376252A1

公开(公告)日：2018-12-27

申请号：US16001596

申请日：2018-06-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Christian LARSEN ,  Anthony S. DOY

IPC: H04R17/00 ,  H03F3/183 ,  H04R3/00

Abstract: A system may include a charge pump configured to transfer electrical energy from a source of electrical energy coupled to an input of the charge pump to an energy storage device coupled to an output of the charge pump and configured to store the electrical energy transferred from the source of electrical energy, a power converter configured to transfer electrical energy from the energy storage device to an output of the power converter, wherein the power converter comprises a first plurality of switches and a power inductor arranged such that one switch of the first plurality of switches is coupled between the power inductor and the output of the charge pump, an output stage configured to transfer electrical energy between the output of the power converter to a load coupled to an output of the output stage, the output stage comprising a second plurality of switches, and a controller configured to generate an output voltage at the output of the output stage as an amplified version of an input signal.