公开(公告)号：US09329614B1

公开(公告)日：2016-05-03

申请号：US13837830

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Prashanth Drakshapalli ,  John L. Melanson ,  Rod Holley ,  Thirumalai Rengachari ,  Ruoxin Jiang ,  Eric Swanson

IPC: G05F3/02 ,  G01R31/28 ,  G01R31/30 ,  G01R31/317 ,  H01L21/66

CPC classification number: G05F3/02 ,  G01R31/2875 ,  G01R31/2884 ,  G01R31/3004 ,  G01R31/31701 ,  H01L22/34

Abstract: In one embodiment a heating mechanism is provided with an integrated circuit for testing and calibration purposes. During production testing, heating elements may be activated in order to quickly bring an integrated circuit up to operating temperature for temperature testing or calibration. Once the operating test temperature has been reached, the circuit can be quickly and easily tested to show it is operable within the design temperature range and/or to obtain calibration data to correct for temperature drift. Calibration data may be used to create correction data, which may be stored within the integrated circuit. During normal operation, the correction data may be used to compensate for variations in operation due to temperature.

Abstract translation: 在一个实施例中，加热机构设置有用于测试和校准目的的集成电路。 在生产测试期间，可以激活加热元件，以便快速将集成电路带到工作温度进行温度测试或校准。 一旦达到了工作测试温度，该电路就可以快速方便地进行测试，以显示其在设计温度范围内可操作和/或获得校准数据以校正温度漂移。 可以使用校准数据来创建可以存储在集成电路内的校正数据。 在正常操作期间，可以使用校正数据来补偿由于温度导致的操作变化。

公开(公告)号：US20160105936A1

公开(公告)日：2016-04-14

申请号：US14509660

申请日：2014-10-08

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson

IPC: H05B33/08 ,  H02M3/24 ,  H05B37/02

CPC classification number: H05B33/0803 ,  H02M3/24 ,  H05B33/0815 ,  H05B33/0818 ,  H05B37/02

Abstract: A buck stage configured as a second stage of a lamp circuit for a light-emitting diode-based (LED-based) light bulb may reduce manufacturing costs associated with the bulb by reducing a size of a capacitor in the lamp circuit. A controller of the buck stage may adjust a duty cycle of a switch to increase a ripple, such as a voltage ripple, across the capacitor to increase accessibility of energy stored in the capacitor and decrease a ripple, such as in output current, to the LEDs.

Abstract translation: 作为用于基于发光二极管（LED）的灯泡的灯电路的第二级的降压级可以通过减小灯电路中的电容器的尺寸来降低与灯泡相关联的制造成本。 降压级的控制器可以调节开关的占空比，以增加电容器两端的纹波（例如电压纹波），以增加存储在电容器中的能量的可访问性，并将诸如输出电流的纹波减小到 LED。

公开(公告)号：US20160072465A1

公开(公告)日：2016-03-10

申请号：US14481201

申请日：2014-09-09

Applicant: Cirrus Logic, Inc.

Inventor： Tejasvi Das ,  Xin Zhao ,  Ted Burk ,  Ku He ,  John L. Melanson ,  Xiaofan Fei

IPC: H03G3/20 ,  H03G3/00

CPC classification number: H03G3/20 ,  H03G3/001 ,  H03G3/002 ,  H03G3/3005 ,  H03G3/3089

Abstract: A signal path may operate in one of a plurality of gain modes such that for each gain mode, the product of a digital gain and an analog signal gain of the signal path associated with the particular gain mode are approximately equal to a fixed path gain. During each of one or more calibration phases, a calibration system may measure analog signals at a plurality of nodes of the first path portion, calculate an actual analog gain associated with the gain mode based on the analog signals measured at the plurality of nodes, calculate an error between the fixed path gain and a mathematical product of the actual analog gain associated with the gain mode and the digital gain associated with the gain mode, and modify at least one of the digital gain and the analog gain associated with the gain mode in conformity with the error.

Abstract translation: 信号路径可以以多种增益模式之一操作，使得对于每个增益模式，与特定增益模式相关联的信号路径的数字增益和模拟信号增益的乘积近似等于固定路径增益。 在一个或多个校准阶段的每一个期间，校准系统可以测量第一路径部分的多个节点处的模拟信号，基于在多个节点处测量的模拟信号来计算与增益模式相关联的实际模拟增益，计算 固定路径增益与与增益模式相关联的实际模拟增益与与增益模式相关联的数字增益的数学乘积之间的误差，并且修改与增益模式相关联的数字增益和模拟增益中的至少一个 符合错误。

公开(公告)号：US09273858B2

公开(公告)日：2016-03-01

申请号：US13903591

申请日：2013-05-28

Applicant: Cirrus Logic, Inc.

Inventor： Eric Jerome King ,  Daniel J. Baker ,  John L. Melanson

IPC: H05B37/00 ,  F21V23/02 ,  H05B33/08

CPC classification number: F21V23/02 ,  H05B33/0815

Abstract: Methods and systems to provide compatibility between a load and a secondary winding of an electronic transformer driven by a leading-edge dimmer may include: (a) responsive to determining that energy is available from the electronic transformer, drawing a requested amount of power from the electronic transformer thus transferring energy from the electronic transformer to an energy storage device in accordance with the requested amount of power; and (b) transferring energy from the energy storage device to the load at a rate such that a voltage of the energy storage device is regulated within a predetermined voltage range.

Abstract translation: 提供由前缘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方法和系统可以包括：（a）响应于确定来自电子变压器的能量可用，从 电子变压器，因此根据所要求的功率量将能量从电子变压器传输到能量存储装置; 和（b）以能够将能量存储装置的电压调节到规定的电压范围内的速度将能量从能量存储装置传递给负载。

公开(公告)号：US20160021714A1

公开(公告)日：2016-01-21

申请号：US14332931

申请日：2014-07-16

Applicant: Cirrus Logic, Inc.

Inventor： Jonathan Williams ,  Ananthakrishnan Viswanathan ,  John L. Melanson ,  August Laible

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B35/00

Abstract: In accordance with the present disclosure, a control circuit may be employed for controlling delivery of energy from an input of a lamp assembly to a load of the lamp assembly. The control circuit may transfer a first amount of energy from an input to a load (e.g., comprising one or more light-emitting diodes) to cause the load to generate light external to the lamp assembly in accordance with a control setting of a dimmer indicating a user-desired amount of energy to be transferred to the load. The control circuit may also transfer a second amount of energy from the input to a second load to cause the second load (e.g., comprising one or more lower-efficacy light-emitting diodes) to dissipate the second amount of energy external to the lamp assembly, wherein the second amount of energy comprises energy present in the input signal other than the first amount of energy.

Abstract translation: 根据本公开，可以采用控制电路来控制从灯组件的输入到灯组件的负载的能量传递。 控制电路可以将第一量的能量从输入传送到负载（例如，包括一个或多个发光二极管），以使负载根据指示灯的调光器的控制设置产生灯组件外部的光 用户期望的能量传递到负载的能量。 控制电路还可以将第二量的能量从输入传递到第二负载，以使第二负载（例如，包括一个或多个低功效发光二极管）消散灯组件外部的第二量的能量 ，其中所述第二能量量包括除了所述第一能量量之外的所述输入信号中存在的能量。

公开(公告)号：US20150372681A1

公开(公告)日：2015-12-24

申请号：US14747068

申请日：2015-06-23

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Roderick D. Holley ,  Jaimin Mehta

IPC: H03L1/02 ,  H03B5/32 ,  H03L7/099

CPC classification number: H03L1/028 ,  H03B5/32 ,  H03L1/026 ,  H03L7/0991

Abstract: A system may include a sampling circuit, a temperature calibration system, a phase detector, a virtual phase-locked loop, and a sample rate converter. The sampling circuit may be configured to generate a series of digitally-sampled data at a sampling frequency provided by a local clock. The temperature calibration system may be configured to determine a temperature-based timing compensation with respect to the local clock. The phase detector may be configured to estimate an error of the local clock in view of the reference clock. The virtual phase-locked loop may be configured to generate a virtual clock based on the temperature-based timing compensation and the error. The sample rate converter may be configured to generate a corrected series of digitally-sampled data in response to the virtual clock by interpolating the series of digitally-sampled data to correct for the error.

Abstract translation: 系统可以包括采样电路，温度校准系统，相位检测器，虚拟锁相环和采样率转换器。 采样电路可以被配置为以由本地时钟提供的采样频率生成一系列数字采样数据。 温度校准系统可以被配置为确定相对于本地时钟的基于温度的定时补偿。 相位检测器可以被配置为考虑到参考时钟来估计本地时钟的误差。 虚拟锁相环可以被配置为基于基于温度的定时补偿和误差来生成虚拟时钟。 采样率转换器可以被配置为通过内插一系列数字采样数据来校正错误来产生响应于虚拟时钟的经校正的数字采样数据序列。

公开(公告)号：US20150364993A1

公开(公告)日：2015-12-17

申请号：US14303068

申请日：2014-06-12

Applicant: Cirrus Logic, Inc.

Inventor： Kan Wang ,  Michael A. Kost ,  Eric J. King ,  John L. Melanson ,  James P. McFarland

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H05B33/0815 ,  Y02B20/346

Abstract: A low voltage lamp includes a boost converter stage and a load. The load may include low voltage light producing elements including low voltage light emitting diodes. The boost converter stage receives an electronic transformer output and includes an inductor coupled to a switch and a switch controller that receives one or more controller inputs. Inductor current may be returned to the transformer when the switch is closed and provided to a rectifier coupled to the load when the switch is open. Controller inputs may include a transformer input that receives the transformer output, a sense input indicating switch current, and a load input indicating load voltage. Controller logic may synchronize assertions of a control signal for the switch with edge transitions of the transformer output to maintain peak inductor current within a specified range and to selectively transfer stored energy in the inductor to the load or back to the transformer.

Abstract translation: 低压灯包括升压转换器级和负载。 负载可以包括低电压发光元件，包括低电压发光二极管。 升压转换器级接收电子变压器输出并且包括耦合到开关的电感器和接收一个或多个控制器输入的开关控制器。 当开关关闭时，电感电流可以返回到变压器，当开关打开时，电感电流提供给耦合到负载的整流器。 控制器输入可以包括接收变压器输出的变压器输入，指示开关电流的感测输入和指示负载电压的负载输入。 控制器逻辑可以使开关的控制信号的断言与变压器输出的边沿转换同步，以将峰值电感电流保持在指定范围内，并有选择地将电感中的能量转移到负载或返回到变压器。

公开(公告)号：US09215772B2

公开(公告)日：2015-12-15

申请号：US14333065

申请日：2014-07-16

Applicant: Cirrus Logic, Inc.

Inventor： Mohit Sood ,  Vishwanathan Subramanian

IPC: H05B41/14 ,  H05B33/08 ,  H02M7/04 ,  H05B37/02 ,  H05B39/04

CPC classification number: H05B33/0845 ,  H02M7/04 ,  H05B37/02 ,  H05B39/048

Abstract: A controller may predict an estimated occurrence of a high-resistance state of a dimmer, wherein the high-resistance state occurs when the dimmer begins phase-cutting an alternating current voltage signal. The controller may also be configured to operate in a trailing-edge exposure mode for a period of time wherein the period of time includes a time of the estimated occurrence of the high-resistance state in order to allow the controller to detect the occurrence of the high-resistance state, wherein energy is transferred from an input to a dissipative element during the trailing-edge exposure mode. The controller may further be configured to minimize a time between a beginning of the period of time and the estimated occurrence of the high-resistance state by modifying the period of time based on an estimated charging time of a capacitor of the dimmer.

Abstract translation: 控制器可以预测调光器的高电阻状态的估计出现，其中当调光器开始切割交流电压信号时，发生高电阻状态。 控制器还可以被配置为在后沿曝光模式下操作一段时间，其中该时间段包括估计出现高电阻状态的时间，以便允许控制器检测到 高电阻状态，其中在后缘曝光模式期间能量从输入传递到耗散元件。 控制器还可以被配置为通过基于调光器的电容器的估计充电时间来修改时间段来最小化时间段的开始和估计的高电阻状态的发生之间的时间。

公开(公告)号：US09215770B2

公开(公告)日：2015-12-15

申请号：US14039355

申请日：2013-09-27

Applicant: Cirrus Logic, Inc.

Inventor： Poornima Mazumdar ,  Michael A. Kost ,  Yanhui Xie ,  Sahil Singh

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0818 ,  H05B33/0815

Abstract: A controller may be configured to: (i) predict based on an electronic transformer secondary signal an estimated occurrence of a high-resistance state of a trailing-edge dimmer coupled to a primary winding of an electronic transformer, wherein the high-resistance state occurs when the trailing-edge dimmer begins phase-cutting an alternating current voltage signal; (ii) operate a power converter in a trailing-edge exposure mode for a first period of time immediately prior to the estimated occurrence of the high-resistance state, such that the power converter is enabled to transfer energy from the secondary winding to the load during the trailing-edge exposure mode; and (iii) operate the power converter in a power mode for a second period of time prior to and non-contiguous with the first period of time, such that the power converter is enabled to transfer energy from the secondary winding to the load during the power mode.

Abstract translation: 控制器可以被配置为：（i）基于电子变压器次级信号预测耦合到电子变压器的初级绕组的后缘调光器的高电阻状态的估计出现，其中发生高电阻状态 当后缘调光器开始切割交流电压信号时; （ii）在估计出现高电阻状态之前的第一时间段内以后沿曝光模式操作功率转换器，使得功率转换器能够将能量从次级绕组传递到负载 在后缘曝光模式期间; 以及（iii）在第一时间段之前和不连续的第二时间段内以功率模式操作功率转换器，使得功率转换器能够在第一时间段期间将能量从次级绕组传递到负载 电源模式。

公开(公告)号：US09214862B2

公开(公告)日：2015-12-15

申请号：US14495564

申请日：2014-09-24

Applicant: Cirrus Logic, Inc.

Inventor： Poornima Mazumdar ,  Mohit Sood ,  Rahul Singh ,  Sahil Singh

IPC: H02M3/156 ,  H02M1/00

CPC classification number: H02M3/156 ,  H02M3/33507 ,  H02M2001/0054 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: A controller may be configured to generate a control signal to activate and deactivate a switch of a switching power converter in order to control a switching period and a peak current of the switching power converter to maintain a regulated current of the switching power converter at a desired current level such that: if the switching period decreases below a minimum switching period, the controller increases the switching period by a ringing period of a voltage of the switch and increases the peak current to compensate for the increase of the switching period in order to maintain the regulated current, and if the peak current increases above a maximum peak current, the controller decreases the switching period by a ringing period of the voltage of the switch and decreases the peak current to compensate for the decrease of the switching period in order to maintain the regulated current.

Abstract translation: 控制器可以被配置为产生控制信号以激活和停用开关功率转换器的开关，以便控制开关功率转换器的开关周期和峰值电流，以将开关功率转换器的调节电流保持在期望的 电流电平使得：如果开关周期降低到最小开关周期以下，则控制器将开关周期增加开关电压的振铃周期，并增加峰值电流以补偿开关周期的增加以便维持 调节电流，并且如果峰值电流增加到最大峰值电流以上，则控制器将开关周期减小开关的电压的振铃周期，并降低峰值电流以补偿开关周期的减小以便维持 调节电流。