公开(公告)号：US09225252B2

公开(公告)日：2015-12-29

申请号：US14203755

申请日：2014-03-11

Applicant: Cirrus Logic, Inc.

Inventor： Prashanth Drakshapalli ,  Rahul Singh ,  Siddharth Maru ,  John L. Melanson

IPC: H05B37/02 ,  H02M3/335 ,  H05B33/08

CPC classification number: H02M3/33507 ,  H05B33/0815 ,  Y02B20/347

Abstract: A power distribution system and method includes a controller that is configured to control a switching power converter. In at least one embodiment, the controller includes a compensation current control circuit to control a compensation current that reduces and, in at least one embodiment, approximately eliminates variations in current drawn by the controller during a particular operational time period. In at least one embodiment, the power distribution system is a lamp that includes the controller, a switching power converter, and one or more light sources, such as light emitting diodes.

Abstract translation: 配电系统和方法包括配置成控制开关功率转换器的控制器。 在至少一个实施例中，控制器包括补偿电流控制电路，用于控制减小的补偿电流，并且在至少一个实施例中，大致消除了在特定操作时间段期间控制器所绘制的电流的变化。 在至少一个实施例中，配电系统是包括控制器，开关功率转换器和一个或多个光源（诸如发光二极管）的灯。

公开(公告)号：US09215532B2

公开(公告)日：2015-12-15

申请号：US13915780

申请日：2013-06-12

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric Swanson

IPC: H04R9/08 ,  H04R19/04 ,  H04R1/04 ,  H04W52/02 ,  H04R3/00 ,  H04R3/04 ,  H04R19/02 ,  H04M1/00 ,  H04R1/10

CPC classification number: H04R3/005 ,  H04R1/04 ,  H04R1/1041 ,  H04R3/04 ,  H04R19/02 ,  H04R19/04 ,  H04R2400/01 ,  H04R2499/11 ,  H04W52/0251 ,  H04W52/0254 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/168

Abstract: In accordance with methods and systems of the present disclosure, a mobile device may include an enclosure adapted such that the enclosure is readily transported by a user of the mobile device, a speaker associated with the enclosure for generating sound, and a controller within the enclosure, communicatively coupled to the speaker. The controller may be configured to receive a signal from the speaker, the signal induced at least in part by sound incident on the speaker other than sound generated by the speaker and process the signal.

公开(公告)号：US20150340955A1

公开(公告)日：2015-11-26

申请号：US14701791

申请日：2015-05-01

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Zhaohui He

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M2001/0003 ,  H02M2001/007 ,  H05B33/0815 ,  Y02B20/346

Abstract: An electronic system includes a controller to provide at least dual-mode conduction control of a switching power converter. In at least one embodiment, the controller is capable to control transitions between discontinuous conduction mode (DCM) and critical conduction mode (CRM) of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter. In at least one embodiment, the controller dynamically compensates for changing parameters of the electronic system by dynamically determining a minimum non-conductive time of the control switch of the switching power converter using the measured switching time parameter value at approximately the peak of the supply voltage of the supply voltage.

Abstract translation: 电子系统包括控制器，用于至少提供开关功率转换器的双模式导通控制。 在至少一个实施例中，控制器能够使用具有对应于一个时间的近似峰值电压的值的测量的开关时间参数来控制开关功率转换器的不连续导通模式（DCM）和临界导通模式（CRM）之间的转换 - 提供给开关电源转换器的电源电压。 在至少一个实施例中，控制器通过动态地确定开关功率转换器的控制开关的最小非导通时间，在大约电源电压的峰值处使用测量的开关时间参数值来动态地补偿电子系统的变化参数 的电源电压。

公开(公告)号：US09167664B2

公开(公告)日：2015-10-20

申请号：US13798926

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Yanhui Xie ,  Eric Jerome King ,  John L. Melanson ,  Michael A. Kost

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B37/02 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/383

Abstract: In accordance with these and other embodiments of the present disclosure, a system and method for providing compatibility between a load and a secondary winding of an electronic transformer driven by a trailing-edge dimmer may include predicting based on an electronic transformer secondary signal an estimated occurrence of a high-resistance state of the trailing-edge dimmer, wherein the high-resistance state occurs when the trailing-edge dimmer begins phase-cutting an alternating current voltage signal and operating the load in a high-current mode for a period of time immediately prior to the estimated occurrence of the high-resistance state.

Abstract translation: 根据本公开的这些和其他实施例，用于提供由后沿调光器驱动的电子变压器的负载和次级绕组之间的兼容性的系统和方法可以包括基于电子变压器次级信号预测估计出现 的后缘调光器的高电阻状态，其中当后沿调光器开始相位切割交流电压信号并且以高电流模式操作负载一段时间时，发生高电阻状态 紧接在估计出现高电阻状态之前。

公开(公告)号：US20150295584A1

公开(公告)日：2015-10-15

申请号：US14680830

申请日：2015-04-07

Applicant: Cirrus Logic, Inc.

Inventor： Tejasvi Das ,  John L. Melanson ,  John C. Tucker ,  Xiaofan Fei

IPC: H03M1/00 ,  H03M1/70 ,  H03M1/66 ,  H03M1/08 ,  H03M1/78

CPC classification number: H03M1/002 ,  H03M1/0845 ,  H03M1/66 ,  H03M1/662 ,  H03M1/68 ,  H03M1/70 ,  H03M1/785 ,  H03M3/32 ,  H03M3/392 ,  H03M3/414 ,  H03M3/416 ,  H03M3/50

Abstract: In accordance with embodiments of the present disclosure, a processing system may include a plurality of processing paths including a first processing path and a second processing path, a digital-to-analog stage output, and a controller. The first processing path may include a first digital-to-analog converter for converting the digital input signal into a first intermediate analog signal, the first digital-to-analog converter configured to operate in a high-power state and a low-power state. The second processing path may include a second digital-to-analog converter for converting a digital input signal into a second intermediate analog signal. The digital-to-analog stage output may be configured to generate an analog signal comprising a sum of the first intermediate analog signal and the second intermediate analog signal. The controller may be configured to operate the first digital-to-analog converter in the lower-power state when a magnitude of the digital input signal is below a threshold magnitude.

Abstract translation: 根据本公开的实施例，处理系统可以包括多个处理路径，包括第一处理路径和第二处理路径，数模转换阶段输出和控制器。 第一处理路径可以包括用于将数字输入信号转换成第一中间模拟信号的第一数模转换器，第一数模转换器被配置为在大功率状态和低功率状态 。 第二处理路径可以包括用于将数字输入信号转换成第二中间模拟信号的第二数模转换器。 数模转换级输出可以被配置为产生包括第一中间模拟信号和第二中间模拟信号之和的模拟信号。 控制器可以被配置为当数字输入信号的幅度低于阈值幅度时，在较低功率状态下操作第一数模转换器。

公开(公告)号：US20150256953A1

公开(公告)日：2015-09-10

申请号：US14200458

申请日：2014-03-07

Applicant: Cirrus Logic, Inc.

Inventor： Nitin Kwatra ,  John L. Melanson

IPC: H04R29/00 ,  H04R3/00 ,  H04R1/10

CPC classification number: H04R1/1083 ,  H04R5/04 ,  H04R2410/05 ,  H04R2460/01 ,  H04R2499/11

Abstract: Based on transducer status input signals indicative of whether headphones housing respective transducers are engaged with ears of a listener, a processing circuit may determine whether the headphones are engaged with respective ears of the listener. Responsive to determining that at least one of the headphones is not engaged with its respective ear, the processing circuit may modify at least one of a first output signal to the first transducer and a second output signal to the second transducer such that at least one of the first output signal and the second output signal is different than such signal would be if the headphones were engaged with their respective ears.

Abstract translation: 基于换能器状态输入信号，指示耳机是否包含各个换能器与收听者的耳朵接合，处理电路可以确定耳机是否与收听者的相应耳朵接合。 响应于确定耳机中的至少一个不与其相应的耳朵接合，处理电路可以将第一输出信号中的至少一个修改为第一换能器，并将第二输出信号修改为第二换能器，使得至少一个 第一输出信号和第二输出信号不同于这样的信号，如果耳机与它们各自的耳朵接合。

公开(公告)号：US20150222235A1

公开(公告)日：2015-08-06

申请号：US14612889

申请日：2015-02-03

Applicant: Cirrus Logic, Inc.

Inventor： Eric Swanson ,  John L. Melanson ,  John C. Tucker ,  Eric J. King

IPC: H03F1/02 ,  H03F3/217 ,  H04R1/00 ,  H03F3/185

CPC classification number: H02M3/1582 ,  H02M3/1588 ,  H03F1/0227 ,  H03F3/181 ,  H03F3/217

Abstract: A switching power stage for producing an output voltage to a load may include a power converter and a controller. The power converter may include a power inductor and plurality of switches arranged to sequentially operate in a plurality of switch configurations. The controller may be configured to, based on a measured parameter associated with the switching power stage, select a selected operational mode of the power converter from a plurality of operational modes, and sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from an input source of the power converter to the load in accordance with the selected operational mode.A switching power stage for producing an output voltage to a load may include a power converter and a controller. The power converter may include a power inductor and plurality of switches arranged to sequentially operate in a plurality of switch configurations. The controller may be configured to, based at least on an input signal to the switching power stage, determine the differential output voltage to be driven at the load, and based on the differential output voltage to be driven at the load, apply a switch configuration from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to generate the differential output voltage.A method may include sequentially applying a plurality of switch configurations in a power converter to selectively activate or deactivate each of the plurality of switches in order operate the power converter as a differential output buck converter, such that: during a charging phase of the power converter, the power inductor is coupled between (i) one of a first terminal of a power source and a second terminal of the power source and (ii) one of a first terminal of the output load and a second terminal of the output load; during a transfer phase of the power converter, at least one of the plurality of switches is activated in order to couple the power inductor between the first terminal of the output load and a second terminal of the output load; and the output voltage comprises a differential voltage between the first and second terminal of the output load.

公开(公告)号：US20150222185A1

公开(公告)日：2015-08-06

申请号：US14612946

申请日：2015-02-03

Applicant: Cirrus Logic, Inc.

Inventor： Eric J. King ,  John L. Melanson

IPC: H02M3/158

CPC classification number: H02M3/1582 ,  H02M3/1588 ,  H03F1/0227 ,  H03F3/181 ,  H03F3/217

Abstract: A switching power stage for producing an output voltage to a load may include a power converter and a controller. The power converter may include a power inductor and plurality of switches arranged to sequentially operate in a plurality of switch configurations. The controller may be configured to, based on a measured parameter associated with the switching power stage, select a selected operational mode of the power converter from a plurality of operational modes, and sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from an input source of the power converter to the load in accordance with the selected operational mode.A switching power stage for producing an output voltage to a load may include a power converter and a controller. The power converter may include a power inductor and plurality of switches arranged to sequentially operate in a plurality of switch configurations. The controller may be configured to, based at least on an input signal to the switching power stage, determine the differential output voltage to be driven at the load, and based on the differential output voltage to be driven at the load, apply a switch configuration from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to generate the differential output voltage.A method may include sequentially applying a plurality of switch configurations in a power converter to selectively activate or deactivate each of the plurality of switches in order operate the power converter as a differential output buck converter, such that: during a charging phase of the power converter, the power inductor is coupled between (i) one of a first terminal of a power source and a second terminal of the power source and (ii) one of a first terminal of the output load and a second terminal of the output load; during a transfer phase of the power converter, at least one of the plurality of switches is activated in order to couple the power inductor between the first terminal of the output load and a second terminal of the output load; and the output voltage comprises a differential voltage between the first and second terminal of the output load.

公开(公告)号：US20150216002A1

公开(公告)日：2015-07-30

申请号：US14166211

申请日：2014-01-28

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric J. King

IPC: H05B33/08 ,  H05B37/02

CPC classification number: H05B33/0845 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B37/02 ,  H05B39/04

Abstract: In accordance with embodiments of the present disclosure, a method and apparatus may include receiving an input waveform from a dimmer, wherein the input waveform is periodic at a first frequency. The method and apparatus may also include generating an output waveform independent of a load coupled to the output waveform, wherein the output waveform is periodic at a second frequency substantially greater than the first frequency, wherein at least one of the second frequency and an amplitude of the output waveform is based on a phase-cut angle of the input waveform indicative of a control setting of the dimmer.

Abstract translation: 根据本公开的实施例，方法和装置可以包括从调光器接收输入波形，其中输入波形是以第一频率周期性的。 所述方法和装置还可以包括生成独立于耦合到输出波形的负载的输出波形，其中输出波形在基本上大于第一频率的第二频率周期性地，其中第二频率和幅度中的至少一个 输出波形基于表示调光器的控制设置的输入波形的相位角。

公开(公告)号：US09072125B2

公开(公告)日：2015-06-30

申请号：US13799329

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Eric Jerome King ,  John L. Melanson

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B37/02 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/383

Abstract: An apparatus may include a controller to provide compatibility between a load and a secondary winding of a transformer driven at its primary winding by a dimmer, wherein the controller is configured to: determine from a transformer secondary signal whether the transformer comprises a magnetic transformer or an electronic transformer; and select a compatibility mode of operation from a plurality of modes of operation based on the determination of whether the transformer comprises a magnetic transformer or an electronic transformer. A method for providing compatibility between a load and a secondary winding of a transformer driven at its primary winding by a dimmer may include determining from a transformer secondary signal whether the transformer comprises a magnetic transformer or an electronic transformer and selecting a compatibility mode of operation from a plurality of modes of operation based on the determination of whether the transformer comprises a magnetic transformer or an electronic transformer.

Abstract translation: 一种装置可以包括控制器，以通过调光器提供在其初级绕组上驱动的变压器的负载和次级绕组之间的兼容性，其中所述控制器被配置为：从变压器次级信号确定变压器是否包括磁变压器或 电子变压器; 并且基于对变压器是否包括磁变压器或电子变压器的确定，从多种操作模式中选择兼容性操作模式。 用于通过调光器提供在其初级绕组上驱动的变压器的负载和次级绕组之间的兼容性的方法可以包括从变压器次级信号确定变压器是否包括磁变压器或电子变压器，并且选择兼容性操作模式 基于确定变压器是否包括磁变压器或电子变压器的多种操作模式。