公开(公告)号：US09521712B1

公开(公告)日：2016-12-13

申请号：US14445732

申请日：2014-07-29

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Arnab Kumar Dutta ,  Stephen Hodapp ,  Prashanth Drakshapalli

IPC: G01R19/00 ,  H05B33/08 ,  G01R27/26 ,  G01R27/02

CPC classification number: G01R27/2605 ,  G01R27/14 ,  H05B33/0842

Abstract: Multiple measurements may be obtained via a single pin of an integrated circuit (IC) to set multiple control parameters of a light emitting diode (LED) controller within the IC. For example, a first input signal may be applied from the IC to two or more components via a single IC pin. A first output signal may be obtained from the two or more components via the single IC pin. A second input signal may be applied from the IC to the two or more components via the single IC pin, and a second output signal may be obtained from the two or more components via the single IC pin. A first parameter and a second parameter of the two or more components may be calculated based, at least in part, on the first output signal and the second output signal obtained via the single IC pin.

Abstract translation: 可以通过集成电路（IC）的单个引脚获得多个测量值，以设置IC内的发光二极管（LED）控制器的多个控制参数。 例如，可以经由单个IC引脚从IC向两个或更多个组件施加第一输入信号。 可以经由单个IC引脚从两个或更多个组件获得第一输出信号。 可以经由单个IC引脚从IC向两个或更多个部件施加第二输入信号，并且可以经由单个IC引脚从两个或更多个部件获得第二输出信号。 可以至少部分地基于经由单个IC引脚获得的第一输​​出信号和第二输出信号来计算两个或更多个组件的第一参数和第二参数。

公开(公告)号：US09504106B2

公开(公告)日：2016-11-22

申请号：US14341984

申请日：2014-07-28

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Thirumalai Rengachari ,  Siddharth Maru ,  Ramin Zanbaghi ,  Firas Azrai ,  Rahul Singh

IPC: H05B37/02 ,  H05B33/08 ,  H02M3/156

CPC classification number: H05B33/0815 ,  H02M3/156 ,  H05B33/0845 ,  H05B37/02

Abstract: A turn-off transition time period, also referred to as a reverse recovery time period, may be compensated for by a controller of a power stage including a bipolar junction transistor (BJT). The reverse recovery time period may be measured in one switching cycle and a subsequent switching cycle may include compensations based on the measured reverse recovery time period. That is the switching on and off of the BJT may be compensated to obtain a desired average output current to a load. When the reverse recovery time period is known, an error in the peak current obtained due to the reverse recovery time period may be calculated. The calculated error may be used to offset the target peak current for controlling the switching of the BJT to begin a turn-off transition of the BJT earlier in a switching cycle and thus reduce error in peak current at the BJT.

Abstract translation: 还可以通过包括双极结型晶体管（BJT）的功率级的控制器补偿关断转换时间段（也称为反向恢复时间周期）。 可以在一个开关周期内测量反向恢复时间段，并且随后的开关周期可以包括基于所测量的反向恢复时间段的补偿。 也就是说，可以补偿BJT的接通和断开以获得期望的负载平均输出电流。 当已知反向恢复时间周期时，可以计算由于反向恢复时间段而获得的峰值电流的误差。 计算出的误差可用于偏移目标峰值电流，以控制BJT的开关，以便在开关周期中较早地开始BJT的关断转换，从而减小BJT的峰值电流误差。

公开(公告)号：US09461537B1

公开(公告)日：2016-10-04

申请号：US14252244

申请日：2014-04-14

Applicant: Cirrus Logic, Inc.

Inventor： Xin Zhao ,  Ku He ,  John L. Melanson ,  Xiaofan Fei

IPC: G05F1/00 ,  H02M3/04 ,  G01R19/00

CPC classification number: H02M3/04 ,  G01R19/0084 ,  G01R19/0092 ,  G01R31/40 ,  H02M3/156 ,  H02M2001/0009

Abstract: A switch control circuit may be utilized for a sequence of switching events: a first event to activate a first switch and deactivate a second switch, wherein a current of an inductor coupled to the first switch and the second switch increases during the first event and has a positive value at an end of the first event; a second event to deactivate the first switch and activate the second switch, wherein the current of an inductor coupled to the first switch and the second switch decreases during the second event; and an impedance event during one of the first event and the second event such that during one of the first event and the second event, the impedance event causes an impedance of the one of the first switch and the second switch to decrease.

Abstract translation: 开关控制电路可以用于一系列切换事件：第一事件以激活第一开关并去激活第二开关，其中耦合到第一开关和第二开关的电感器的电流在第一事件期间增加并具有 在第一个事件结束时的正值; 第二事件，用于停用第一开关并激活第二开关，其中耦合到第一开关和第二开关的电感器的电流在第二事件期间减小; 以及在第一事件和第二事件之一期间的阻抗事件，使得在第一事件和第二事件之一期间，阻抗事件引起第一开关和第二开关中的一个的阻抗减小。

公开(公告)号：US20160255685A1

公开(公告)日：2016-09-01

申请号：US14634716

申请日：2015-02-27

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Ramin Zanbaghi ,  Thirumalai Rengachari ,  Prashanth Drakshapalli ,  Rahul Singh ,  Arnab Kumar Dutta

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M3/335 ,  H05B33/0845 ,  H05B33/0887 ,  H05B37/02

Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as a converter in LED-based light bulbs. The power stage may be operated by a controller to maintain a desired current output to the LED load. The controller may operate the power stage by monitoring a start and end of a reverse recovery time of the BJT. Information regarding the start and end of the reverse recovery time may be used in the control of the power stage to improve efficiency of the power stage.

Abstract translation: 双极结型晶体管（BJT）可用于功率级DC-DC转换器，例如基于LED的灯泡中的转换器。 功率级可以由控制器操作以保持对LED负载的期望的电流输出。 控制器可以通过监视BJT的反向恢复时间的开始和结束来操作功率级。 关于反向恢复时间的开始和结束的信息可以用于功率级的控制，以提高功率级的效率。

公开(公告)号：US09407279B2

公开(公告)日：2016-08-02

申请号：US14617376

申请日：2015-02-09

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Jaimin Mehta ,  Stephen T. Hodapp

IPC: H03M1/10 ,  H03M1/06 ,  H03M1/08 ,  H03M1/66 ,  H03M3/00

CPC classification number: H03M1/1038 ,  H03M1/06 ,  H03M1/0665 ,  H03M1/0863 ,  H03M1/10 ,  H03M1/1009 ,  H03M1/66 ,  H03M3/458

Abstract: An apparatus may include a scrambler element configured to receive an input signal and generate a scrambled thermometer code-like signal having a plurality of bits based on the input signal and having a plurality of possible quantization values. The scrambler element may generate at least one equivalent code of the scrambled thermometer code-like signal for each possible quantization value. For each of one or more of the possible quantization values, the scrambler element may be configured to generate a plurality of possible equivalent codes of the scrambled thermometer code-like signal. Responsive to the input signal indicating a change in quantization value of the scrambled thermometer code-like signal, the scrambler element may change the scrambled thermometer code-like signal by transitioning the smallest possible number of the plurality of bits of the scrambled thermometer code-like signal to change quantization value of the scrambled thermometer code-like signal in accordance with the input signal.

Abstract translation: 装置可以包括扰频器元件，其被配置为接收输入信号并且基于输入信号生成具有多个比特的加扰温度计类似码字的信号，并且具有多个可能的量化值。 加扰器元件可以为每个可能的量化值生成加扰的温度计代码样信号的至少一个等效代码。 对于一个或多个可能的量化值中的每个，加扰器元件可以被配置为生成加扰的温度计代码样信号的多个可能的等效代码。 响应于指示加扰的温度计编码类信号的量化值的改变的输入信号，加扰器元件可以通过转换加扰的温度计代码样信号的多个比特的最小可能数来改变加扰的温度计代码样信号 信号以根据输入信号改变加扰的温度计代码样信号的量化值。

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。