公开(公告)号：US09263964B1

公开(公告)日：2016-02-16

申请号：US13972102

申请日：2013-08-21

Applicant: Cirrus Logic, Inc.

Inventor： Michael A. Kost ,  Wesley L. Mokry ,  Prashanth Drakshapalli ,  Stephen T. Hodapp ,  Firas Azrai

IPC: H05B37/00 ,  H02M7/06 ,  H05B33/08

CPC classification number: H02M7/06 ,  H02M1/36 ,  H02M2001/0006 ,  H05B33/0809 ,  H05B33/0815

Abstract: In accordance with systems and methods of the present disclosure, an apparatus for providing compatibility between a load having a reactive impedance and a secondary winding of an electronic transformer may include a power converter and a circuit. The power converter may be configured to transfer electrical energy from the secondary winding to the load. The circuit may be configured to charge an energy storage device coupled to the power converter following start-up of the electronic transformer in order to increase a voltage of the energy storage device to at least a voltage level sufficient for the electronic transformer to enter steady-state operation.

Abstract translation: 根据本公开的系统和方法，用于提供具有无功阻抗的负载和电子变压器的次级绕组之间的兼容性的装置可以包括功率转换器和电路。 功率转换器可以被配置为将电能从次级绕组传递到负载。 电路可以被配置为对电子变压器起动之后耦合到功率转换器的能量存储装置进行充电，以便将能量存储装置的电压增加到至少足以使电子变压器进入稳定电压的电压， 状态操作。

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：US20140009078A1

公开(公告)日：2014-01-09

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

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：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：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：US09204503B1

公开(公告)日：2015-12-01

申请号：US13933849

申请日：2013-07-02

Applicant: Cirrus Logic, Inc.

Inventor： Michael A. Kost

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

CPC classification number: H05B33/0809 ,  H05B33/0815 ,  H05B33/0827

Abstract: In accordance with methods and systems of the present disclosure, an integrated circuit may include an output terminal and a switching circuit. The output terminal may supply charging current to a magnetic storage element for supplying energy to two or more lighting devices coupled to the magnetic storage element. The switching circuit may have an input coupled to an input power source and an output coupled to the output terminal for charging the magnetic storage element during charging intervals, wherein energy is supplied from the magnetic storage element to a first one of the lighting devices during flyback intervals following the charging intervals occurring during a first synchronization phase and to a second one of the lighting devices during flyback intervals following the charging intervals occurring during a second synchronization phase.

Abstract translation: 根据本公开的方法和系统，集成电路可以包括输出端子和开关电路。 输出端子可以向磁存储元件提供充电电流，以向耦合到磁存储元件的两个或更多个照明装置提供能量。 开关电路可以具有耦合到输入电源的输入和耦合到输出端的输出，用于在充电间隔期间对磁存储元件充电，其中在回扫期间能量从磁存储元件供应到第一个照明装置 在第一同步阶段期间发生的充电间隔之后的间隔，以及在第二同步阶段期间发生的充电间隔之后的反激间隔期间的照明装置中的第二个间隔。

公开(公告)号：US20150340956A1

公开(公告)日：2015-11-26

申请号：US14701946

申请日：2015-05-01

Applicant: Cirrus Logic, Inc.

Inventor： Yanhui Xie ,  Michael A. Kost ,  John L. Melanson ,  Zhaohui He ,  Chris M. Franklin

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H05B33/08 ,  H05B33/0815 ,  Y02B20/346

Abstract: A power distribution system includes controller of a switching power converter to control the switching power converter and determine one or more switching power converter control parameters. In at least one embodiment, the switching power converter utilizes a transformer to transfer energy from a primary-side of the transformer to a secondary-side of the transformer. In at least one embodiment, the switching power converter control parameters includes a secondary-side conduction time delay that represents a time delay between when the primary-side ceases conducting a primary-side current and the secondary-side begins to conduct a secondary-side current. In at least one embodiment, determining and accounting for this secondary-side conduction time delay increases the prediction accuracy of the secondary-side current value and accurate delivery of energy to a load when the controller does not directly sense the secondary-side current provided to the load.

Abstract translation: 配电系统包括开关电源转换器的控制器，以控制开关功率转换器并确定一个或多个开关功率转换器控制参数。 在至少一个实施例中，开关功率转换器利用变压器将能量从变压器的初级侧传递到变压器的次级侧。 在至少一个实施例中，开关功率转换器控制参数包括次级侧导通时间延迟，其表示在初级侧停止进行初级侧电流和次级侧之间的时间延迟开始进行二次侧 当前。 在至少一个实施例中，确定和计算该次级侧导通时间延迟增加了次级侧电流值的预测精度，并且当控制器不直接感测提供给 负载。

公开(公告)号：US20140333205A1

公开(公告)日：2014-11-13

申请号：US14276535

申请日：2014-05-13

Applicant: Cirrus Logic, Inc.

Inventor： Michael A. Kost ,  Eric J. King ,  John L. Melanson ,  Kan Wang ,  Ramin Zanbaghi

IPC: H02M5/458 ,  H05B33/08

CPC classification number: H02M5/458 ,  H05B33/0815 ,  H05B33/0887

Abstract: An electronic transformer stabilization circuit includes a detection circuit and a reactive load. The detection circuit may be configured to receive a transformer output or a transformer signal derived from the transformer output. The detection circuit may determine whether the transformer that generated the transformer output is an electronic transformer. The determination may be made based on the presence of absence of high frequency components in the transformer output. Responsive to determining that an electronic transformer generated the transformer output, the stabilization circuit may operate a switch to connect the reactive load across an output of the transformer. The reactive load may include an inductor and may be configured to draw a stabilization current from the transformer. The stabilization current may ensure that the total current drawn from the transformer exceeds an oscillation current required to maintain reliable operation of the electronic transformer.

Abstract translation: 电子变压器稳定电路包括检测电路和无功负载。 检测电路可以被配置为接收从变压器输出导出的变压器输出或变压器信号。 检测电路可以确定产生变压器输出的变压器是电子变压器。 可以基于变压器输出中是否存在高频分量进行确定。 响应于确定电子变压器产生变压器输出，稳定电路可以操作开关以连接变压器输出端上的无功负载。 无功负载可以包括电感器，并且可以被配置成从变压器抽出稳定电流。 稳定电流可以确保从变压器抽出的总电流超过维持电子变压器可靠运行所需的振荡电流。

公开(公告)号：US20140028214A1

公开(公告)日：2014-01-30

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: 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：US09024541B2

公开(公告)日：2015-05-05

申请号：US14201050

申请日：2014-03-07

Applicant: Cirrus Logic, Inc.

Inventor： Yanhui Xie ,  Michael A. Kost ,  John L. Melanson ,  Zhaohui He ,  Chris M. Franklin

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

CPC classification number: H02M3/33507 ,  H05B33/08 ,  H05B33/0815 ,  Y02B20/346

Abstract: A power distribution system includes controller of a switching power converter to control the switching power converter and determine one or more switching power converter control parameters. In at least one embodiment, the switching power converter utilizes a transformer to transfer energy from a primary-side of the transformer to a secondary-side of the transformer. In at least one embodiment, the switching power converter control parameters includes a secondary-side conduction time delay that represents a time delay between when the primary-side ceases conducting a primary-side current and the secondary-side begins to conduct a secondary-side current. In at least one embodiment, determining and accounting for this secondary-side conduction time delay increases the prediction accuracy of the secondary-side current value and accurate delivery of energy to a load when the controller does not directly sense the secondary-side current provided to the load.

Abstract translation: 配电系统包括开关电源转换器的控制器，以控制开关功率转换器并确定一个或多个开关功率转换器控制参数。 在至少一个实施例中，开关功率转换器利用变压器将能量从变压器的初级侧传递到变压器的次级侧。 在至少一个实施例中，开关功率转换器控制参数包括次级侧导通时间延迟，其表示在初级侧停止进行初级侧电流和次级侧之间的时间延迟开始进行二次侧 当前。 在至少一个实施例中，确定和计算该次级侧导通时间延迟增加了次级侧电流值的预测精度，并且当控制器不直接感测提供给 负载。