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：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：US20150326125A1

公开(公告)日：2015-11-12

申请号：US14706587

申请日：2015-05-07

Applicant: Cirrus Logic, Inc.

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

IPC: H02M3/158

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.

Abstract translation: 根据本公开的实施例，系统可以包括阻抗估计器，其被配置为基于至少基于输入电压和阻抗来估计负载的阻抗并产生目标电流，电压反馈环路响应于 输入电压和负载的输出电压;以及电流控制器，被配置为响应于电压反馈环路，阻抗估计器和输入电压，产生到负载的输出电流。

公开(公告)号：US20150271882A1

公开(公告)日：2015-09-24

申请号：US14220472

申请日：2014-03-20

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King ,  Rahul Singh

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0845 ,  H05B37/02 ,  H05B39/047 ,  H05B41/28 ,  H05B41/2827 ,  Y02B20/345 ,  Y02B20/346 ,  Y02B20/347

Abstract: An LED lighting device includes an auxiliary power supply that supplies power to a control circuit of the LED lighting device that receives an input from a terminal of a light-emitting diode (LED) string of the lighting device that has a substantially lower voltage than the line voltage to which the lighting device is connected. The terminal may be within the LED string, or may be an end of the string. A linear regulator may be operated from the voltage drop across a number of the LEDs in the string so that the energy wasted by the auxiliary power supply is minimized. In other designs, the auxiliary power supply may be intermittently connected in series with the LED string only when needed. The intermittent connection can be used to forward bias a portion of the LED string when the voltage supplied to the LED string is low, increasing overall brightness.

Abstract translation: LED照明装置包括辅助电源，其向LED照明装置的控制电路供电，所述控制电路接收来自所述照明装置的发光二极管（LED）串的端子的输入，所述发光二极管（LED） 照明装置所连接的线路电压。 终端可以在LED串内，或者可以是串的末端。 线性调节器可以从串中的多个LED上的电压降来操作，使得由辅助电源浪费的能量最小化。 在其他设计中，辅助电源可以仅在需要时与LED串串联连接。 当提供给LED串的电压低时，可以使用间歇连接来对LED串的一部分进行偏置，从而提高整体亮度。

公开(公告)号：US20150264762A1

公开(公告)日：2015-09-17

申请号：US14727995

申请日：2015-06-02

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric J. King

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M1/4225 ,  H02M2001/0045 ,  H05B33/0842 ,  H05B41/245 ,  H05B41/2928 ,  H05B41/34 ,  Y02B20/346 ,  Y02B70/126

Abstract: A lighting system includes one or more methods and systems to control dissipation of excess power in the lighting system when the power into a switching power converter from a leading edge, phase-cut dimmer is greater than the power out of the switching power converter. In at least one embodiment, the lighting system includes a controller that controls dissipation of excess energy in the lighting system to prevent a premature disconnection of the phase-cut dimmer. In at least one embodiment, the controller actively controls power dissipation by generating one or more signals to actively and selectively control power dissipation in the lighting system. By actively and selectively controlling power dissipation in the lighting system, the controller intentionally dissipates power when the power into the lighting system should be greater than the power out to a lamp of the lighting system. In at least one embodiment, the controller creates one or more intermixed and/or interspersed power dissipation phases with one or more switching power converter charging and/or flyback phases.

Abstract translation: 照明系统包括一个或多个方法和系统，用于当来自前沿的切换调光器的功率大于开关功率转换器的功率时，控制照明系统中多余功率的耗散。 在至少一个实施例中，照明系统包括控制器，其控制照明系统中的多余能量的耗散以防止相位切割调光器的过早断开。 在至少一个实施例中，控制器通过产生一个或多个信号主动地和有选择地控制照明系统中的功率耗散来主动地控制功率耗散。 通过积极和选择性地控制照明系统中的功率消耗，当进入照明系统的电力应大于照明系统的灯的电力时，控制器有意地耗散功率。 在至少一个实施例中，控制器利用一个或多个开关功率转换器充电和/或反激阶段创建一个或多个混合和/或散置的功率耗散相位。

公开(公告)号：US09112467B1

公开(公告)日：2015-08-18

申请号：US13652939

申请日：2012-10-16

Applicant: Cirrus Logic, Inc.

Inventor： John Christopher Tucker ,  Daniel John Allen ,  John L. Melanson ,  Ammisetti Prasad

IPC: H03F99/00 ,  H03G3/20 ,  H02M3/07 ,  H03F1/02

CPC classification number: H03G3/004 ,  H02M3/07 ,  H03F1/0227 ,  H03F1/025 ,  H03F3/183 ,  H03F2200/03 ,  H03F2200/211 ,  H03F2200/507 ,  H03G3/20 ,  H03G3/3031

Abstract: An energy-efficient consumer device audio power output stage with gain control provides improved battery life and reduced power dissipation without clipping the audio output signal. A power supply having a selectable operating mode supplies the power supply rails to the power amplified output stage. The operating mode is controlled in conformity with an input audio signal level, which may be determined from a volume control setting of the device and/or from a signal level detector that determines the amplitude of the signal being amplified. The gain applied to the audio input signal is reduced for a predetermined time period when a higher output voltage of the power supply is selected, to avoid clipping the audio output signal.

Abstract translation: 具有增益控制功能的节能消费电子设备音频功率输出级能够提高电池寿命，降低功耗，同时不会影响音频输出信号。 具有可选操作模式的电源将电源轨提供给功率放大输出级。 操作模式根据输入音频信号电平进行控制，输入音频信号电平可以根据设备的音量控制设置和/或从确定被放大的信号的幅度的信号电平检测器确定。 当选择电源的较高输出电压时，施加到音频输入信号的增益在预定时间段内减小，以避免削波音频输出信号。

公开(公告)号：US09088237B2

公开(公告)日：2015-07-21

申请号：US13827848

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Stephen James Sanchez ,  Marc John Kobayashi ,  Branislav Pjetar ,  John L. Melanson

IPC: H02P6/18

CPC classification number: H02P6/183 ,  H02P6/182

Abstract: A system for controlling motor switching in a sensorless BLDC having a stator with three stator windings and a permanent magnet rotor. The system includes a controller unit comprising a control signal generator, a memory device, a processing unit, a signal acquisition device, and an analog-to-digital converter. A power stage controlled by the controller unit has a plurality of switches and drives two windings of the three stator windings with a pulse width modulation signal and leaves one stator of the three stator windings undriven. The processing unit acquires a demodulated measured voltage on the undriven winding. The processing unit calculates a threshold at which the power stage will change which two windings of the three stator windings are driven when the demodulated measured voltage surpasses the threshold.

Abstract translation: 一种用于控制具有三个定子绕组的定子和一个永磁转子的无传感器BLDC中的电动机切换的系统。 该系统包括控制器单元，其包括控制信号发生器，存储器件，处理单元，信号采集器件和模数转换器。 由控制器单元控制的功率级具有多个开关并利用脉宽调制信号驱动三个定子绕组的两个绕组，并且使三个定子绕组中的一个定子不被驱动。 处理单元获取未驱动绕组上的解调测量电压。 当解调的测量电压超过阈值时，处理单元计算功率级将改变三个定子绕组的两个绕组被驱动的阈值。

公开(公告)号：US08994306B2

公开(公告)日：2015-03-31

申请号：US13835101

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Marc John Kobayashi ,  Jason William Lawrence ,  Stephen James Sanchez ,  John L. Melanson ,  Miroslav Olijaca

IPC: H02P1/04 ,  H02P6/18

CPC classification number: H02P6/183 ,  H02P6/185

Abstract: The system and method disclose for the controlling of sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet DC motor. A motor controller controls a power stage that drives two windings of a set of three windings in the motor with pulse width modulated signal. A plurality of voltage values on an undriven winding of the set of three windings are sampled within a window of time, wherein a period beginning when the driven windings are energized and ending when the driven windings are de-energized encompasses the window of time. The sampled voltage values are processed. When the processed voltage values exceed a threshold, the motor controller changes which two windings are driven.

Abstract translation: 该系统和方法公开了用于控制驱动多相无传感器无刷永磁直流电动机的一组定子绕组中的顺序相位切换。 电机控制器控制功率级，通过脉宽调制信号驱动马达中一组三个绕组的两个绕组。 在三个绕组组中的未驱动绕组上的多个电压值在时间窗口内被采样，其中从被驱动绕组通电并且当从动绕组断电时结束的周期包括时间窗口。 对采样的电压值进行处理。 当处理的电压值超过阈值时，电机控制器改变驱动两个绕组。

公开(公告)号：US08981661B2

公开(公告)日：2015-03-17

申请号：US14084662

申请日：2013-11-20

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King

IPC: H05B41/16 ,  H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0845 ,  H05B37/0263 ,  Y02B20/346

Abstract: A circuit for powering high-efficiency lighting devices from a thyristor-controlled dimmer operates a switching power circuit during active portions of half-cycles of the AC line voltage source that supplies the dimmer. A control circuit determines the durations of the active portions such that sufficient energy is transferred to operate the lighting devices until a next half-cycle of the AC line voltage, at which time the active portion of the half-cycle is terminated. A high impedance level is presented to the output of the dimmer until the next half-cycle commences.

Abstract translation: 用于从晶闸管控制的调光器供电高效率照明装置的电路在提供调光器的AC线路电压源的半周期的有效部分期间操作开关电源电路。 控制电路确定有效部分的持续时间，使得传送足够的能量以操作照明装置，直到AC线路电压的下一个半周期，此时半周期的有效部分终止。 高阻抗电平被提供给调光器的输出，直到下一个半周期开始。