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：US20140339999A1

公开(公告)日：2014-11-20

申请号：US14280539

申请日：2014-05-16

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Ramin Zanbaghi ,  Jieyeon Choi ,  Firas Azrai ,  Rahul Singh ,  Siddharth Maru

IPC: H02M3/07 ,  H05B33/08

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M3/335 ,  H02M2001/0006 ,  H03K17/64 ,  H05B33/0815 ,  H05B33/0845

Abstract: A bipolar junction transistor (BJT) may be used to generate a supply voltage for operating a controller, such as a lighting controller for a LED-based light bulb. A base of the BJT may receive current generated from the supply voltage to control operation of the BJT. Although the base of the BJT would be at a lower voltage than the emitter, a base drive circuit may be coupled between the emitter and the base of the BJT to increase the voltage. As one example, the base drive circuit may be a charge pump. In another example, the BJT may function as its own charge pump. In yet another example, a positive and a negative base current of the BJT may be independently controlled to regulate an output supply voltage VDD from the BJT.

Abstract translation: 可以使用双极结型晶体管（BJT）来产生用于操作诸如用于基于LED的灯泡的照明控制器的控制器的电源电压。 BJT的基座可以接收从电源电压产生的电流，以控制BJT的工作。 虽然BJT的基极处于比发射极更低的电压，但是基极驱动电路可以耦合在发射极和BJT的基极之间以增加电压。 作为一个示例，基本驱动电路可以是电荷泵。 在另一个例子中，BJT可以用作其自身的电荷泵。 在另一个例子中，可以独立地控制BJT的正和负的基极电流以调节来自BJT的输出电源电压VDD。

公开(公告)号：US20140265933A1

公开(公告)日：2014-09-18

申请号：US14101963

申请日：2013-12-10

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King ,  Siddharth Maru

IPC: H05B33/08

CPC classification number: H05B33/0806 ,  H05B33/0845 ,  H05B33/0848 ,  H05B39/044 ,  Y02B20/383

Abstract: Systems and methods for learning dimmer characteristics provide improved efficiency in operating lighting devices. In one embodiment, an apparatus includes a lamp controller that is configured to monitor voltage information associated with one or more lamps or a dimmer of a system, adjust one or more parameters of an attach current profile in conformity with the voltage information to arrive at a selected attach current profile, and apply within the system the selected attach current profile.

Abstract translation: 用于学习调光特性的系统和方法提高了操作照明装置的效率。 在一个实施例中，一种装置包括灯控制器，其被配置为监视与一个或多个灯或系统的调光器相关联的电压信息，根据电压信息调整附接电流曲线的一个或多个参数以达到 选择附加电流配置文件，并在系统中应用所选的连接电流配置文件。

公开(公告)号：US20140265893A1

公开(公告)日：2014-09-18

申请号：US14212546

申请日：2014-03-14

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King ,  Siddharth Maru

IPC: H05B33/08

CPC classification number: H05B33/0806 ,  H05B33/0845 ,  H05B33/0848 ,  H05B39/044 ,  Y02B20/383

Abstract: A circuit for powering high-efficiency lighting devices from a thyristor-controlled dimmer includes a power converter for powering the high-efficiency lighting devices from input terminals of the circuit. The circuit also includes a control circuit that controls the input current drawn by the input terminals at least while the power converter transfers energy to the lighting devices. The circuit also includes a sensing circuit that determines or measures at least one attach current characteristic at the input terminals and stores an indication of the characteristic for subsequent operation of the control circuit.

Abstract translation: 用于从晶闸管控制的调光器为高效照明装置供电的电路包括用于从电路的输入端为高效照明装置供电的电力转换器。 该电路还包括控制电路，其至少在电力转换器将能量传递到照明装置时，控制由输入端子汲取的输入电流。 电路还包括感测电路，其确定或测量输入端子处的至少一个附着电流特性，并存储用于控制电路的后续操作的特性指示。

公开(公告)号：US20140028095A1

公开(公告)日：2014-01-30

申请号：US13829231

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Siddharth Maru ,  Zhaohui He ,  Mohit Sood ,  Prashanth Drakshapalli ,  Rahul Singh

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/335 ,  H03K17/145 ,  H05B33/0815 ,  H05B33/0848 ,  H05B33/0884 ,  Y02B20/341 ,  Y10T307/406 ,  Y10T307/832

Abstract: An electronic system and method include a controller to operate in a start-up mode to accelerate driving a load to an operating voltage and then operates in a post-start-up mode. A start-up condition occurs when the controller detects that a load voltage is below a predetermined voltage threshold level. The predetermined voltage threshold level is set so that the controller will boost the voltage to an operating value of a load voltage at a faster rate than during normal, steady-state operation. The controller causes a switching power converter to provide charge to the load at a rate in accordance with a start-up mode until reaching an energy-indicating threshold. When the energy-indicating threshold has been reached, the controller causes the switching power converter to (i) decrease the amount of charge provided to the load relative to the charge provided during the start-up mode and (ii) operate in a distinct post-start-up-mode.

Abstract translation: 电子系统和方法包括控制器，其以启动模式操作以加速将负载驱动到工作电压，然后在启动后模式下操作。 当控制器检测到负载电压低于预定电压阈值电平时，发生启动条件。 设定预定的电压阈值电平，使得控制器将以比在正常的稳态操作期间更快的速率将电压升高到负载电压的操作值。 控制器使得开关功率转换器以按照启动模式的速率向负载提供电荷，直到达到能量指示阈值。 当达到能量指示阈值时，控制器使开关功率转换器（i）减少提供给负载的相对于启动模式期间提供的电荷的电荷量，以及（ii）在不同的位置操作 - 启动模式。

公开(公告)号：US20150323947A1

公开(公告)日：2015-11-12

申请号：US14706680

申请日：2015-05-07

Applicant: Cirrus Logic, Inc.

Inventor： Christophe J. Amadi ,  Siddharth Maru ,  Eric J. King

IPC: G05F1/575

CPC classification number: H03F1/083 ,  G05F1/575 ,  H02M3/158 ,  H03F1/0277 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/372

Abstract: In accordance with embodiments of the present disclosure, a system may include an impedance estimator configured to estimate an impedance of a load and generate a target current based at least on an input voltage and the impedance, a voltage feedback loop responsive to a difference between the input voltage and an output voltage of the load, and a current controller configured to, responsive to the voltage feedback loop, the impedance estimator, and the input voltage, generate an output current to the load.A controller may be configured to sequentially apply switch configurations to a power converter to selectively activate or deactivate each of a plurality of switches of the power converter in accordance with a selected operational mode of the power converter, wherein the plurality of operational modes may include a single-ended buck mode for switching a polarity of the output voltage in which: during a charging phase, at least one of the plurality of switches is activated such that a power inductor is coupled between a first terminal of a power source and a particular one of the first output terminal and the second output terminal; and during a transfer phase, at least one of the plurality of switches is activated such that the power inductor is coupled between a second terminal of the power source and the particular one of the first output terminal and the second output terminal.A controller may be configured to sequentially apply a plurality of switch configurations of a power converter in order to operate the power converter as a differential output converter to switch a polarity of the output voltage, such that: during a charging phase of the power converter, a power inductor is coupled between one of a first terminal and a second terminal of the power source and one of a first terminal 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 second terminal of the power source and one of the first terminal of the output load and the second terminal of the output load, wherein the output voltage comprises a differential voltage between the first terminal and the second terminal.A power converter may include a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, an output for producing the output voltage, wherein a first switch is coupled to a first output terminal of the output and a second switch is coupled to a second output terminal of the output, and a linear amplifier coupled to the output. The controller may be configured to, in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load, and in at least one mode of the power stage other than the linear amplifier mode, 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 the electrical energy from the input source to the load.

公开(公告)号：US20140252975A1

公开(公告)日：2014-09-11

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: 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：US20130155728A1

公开(公告)日：2013-06-20

申请号：US13715451

申请日：2012-12-14

Applicant: Cirrus Logic, Inc.

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

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M1/44 ,  H02M3/33523 ,  H02M3/33561 ,  H02M3/33576 ,  H02M5/2576 ,  H02M7/217 ,  H02M2001/0006 ,  H02M2001/0048 ,  H05B33/0815 ,  H05B33/0845 ,  H05B37/02 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B70/126 ,  Y02B70/1491

Abstract: An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.

Abstract translation: 电子系统和方法包括控制器，用于主动地控制从开关功率转换器的初级绕组到辅助电源的辅助绕组的功率传递。 开关电源转换器被控制和配置为使得在向辅助绕组传递电力时，开关功率转换器不将电荷传送到开关功率转换器的一个或多个次级绕组。 因此，开关功率转换器将一个或多个次级变压器绕组电流与辅助绕组电流隔离。 通过将输送到一个或多个次级绕组的电荷从传送到辅助绕组的电荷隔离，控制器可以精确地确定输送到次级绕组的电荷量，从而准确地确定负载。

公开(公告)号：US20130154496A1

公开(公告)日：2013-06-20

申请号：US13715914

申请日：2012-12-14

Applicant: Cirrus Logic, Inc.

Inventor： Siddharth Maru ,  Zhaohui He ,  Mohit Sood

IPC: H02M3/335 ,  H05B37/02

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M1/44 ,  H02M3/33523 ,  H02M3/33561 ,  H02M3/33576 ,  H02M5/2576 ,  H02M7/217 ,  H02M2001/0006 ,  H02M2001/0048 ,  H05B33/0815 ,  H05B33/0845 ,  H05B37/02 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B70/126 ,  Y02B70/1491

Abstract: In at least one embodiment, an electronic system and method includes a controller to control a switching power converter in at least two different modes of operation depending on whether the controller detects a dimmer or not and/or whether a load requests more power than either of the two operational modes can provide. In at least one embodiment, the controller detects whether a dimmer is phase cutting an input voltage to a switching power converter. The controller operates the switching power converter in a first mode if the dimmer is detected, and the controller operates the switching power converter in a second mode if the dimmer is not detected. The controller also transitions between operating the switching power converter in the first mode and the second mode if a status of detection of the dimmer changes.

Abstract translation: 在至少一个实施例中，电子系统和方法包括控制器，用于根据控制器是否检测到调光器和/或负载是否要求比任何一个调光器更多的功率来控制至少两种不同的操作模式的开关功率转换器 两种操作模式可以提供。 在至少一个实施例中，控制器检测调光器是否相位切割到开关功率转换器的输入电压。 如果检测到调光器，则控制器以第一模式操作开关功率转换器，并且如果未检测到调光器，则控制器在第二模式下操作开关功率转换器。 如果调光器的检测状态改变，则控制器还在第一模式中操作开关电源转换器和第二模式之间转换。

公开(公告)号：US09698732B2

公开(公告)日：2017-07-04

申请号：US14706656

申请日：2015-05-07

Applicant: Cirrus Logic, Inc.

Inventor： Siddharth Maru ,  Eric J. King

IPC: H02M3/158 ,  H03F1/08 ,  G05F1/575 ,  H03F3/217 ,  H03F1/02 ,  H03F3/181

CPC classification number: H03F1/083 ,  G05F1/575 ,  H02M3/158 ,  H03F1/0277 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/372

Abstract: A controller may be configured to sequentially apply a plurality of switch configurations of a power converter in order to operate the power converter as a differential output converter to switch a polarity of the output voltage, such that: during a charging phase of the power converter, a power inductor is coupled between one of a first terminal and a second terminal of the power source and one of a first terminal 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 second terminal of the power source and one of the first terminal of the output load and the second terminal of the output load, wherein the output voltage is a differential voltage between the first terminal and the second terminal.