公开(公告)号：US08222872B1

公开(公告)日：2012-07-17

申请号：US12493045

申请日：2009-06-26

申请人： John L. Melanson ,  Mauro L. Gaetano ,  Larry L. Harris

发明人： John L. Melanson ,  Mauro L. Gaetano ,  Larry L. Harris

IPC分类号： G05F1/613 ,  H02M7/162

CPC分类号： H02M3/155 ,  H02M3/33561 ,  H02M2001/0006

摘要： A auxiliary power supply having a selectable operating mode raises efficiency of a switched-power converter. By selectably controlling the input/output behavior of the auxiliary power supply receiving a voltage from an auxiliary winding of one of the power converter magnetic elements, more efficient operation of the auxiliary power supply over the full variation range of the input line voltage is achieved. By selecting the operating mode according to the relationship between the required auxiliary power supply output and the voltage available across the auxiliary winding under current operating conditions, the turns ratio of the auxiliary winding and other circuit parameters can be optimized for efficiency. Selection of the operating mode may be made by detecting the output or input voltage of the multiplier, and the selection may be performed under hysteretic control so that the variation in auxiliary power supply output voltage is reduced dynamically.

摘要翻译： 具有可选操作模式的辅助电源提高了开关电源转换器的效率。 通过可选择地控制从功率转换器磁性元件之一的辅助绕组接收电压的辅助电源的输入/输出特性，实现了在输入线电压的整个变化范围内辅助电源的更有效的操作。 通过根据所需辅助电源输出与辅助绕组在当前工作条件下可用的电压之间的关系选择工作模式，辅助绕组和其他电路参数的匝数比可以优化效率。 可以通过检测乘法器的输出或输入电压来进行操作模式的选择，并且可以在滞后控制下执行选择，使得辅助电源输出电压的变化被动态地减小。

公开(公告)号：US08212491B2

公开(公告)日：2012-07-03

申请号：US12347138

申请日：2008-12-31

申请人： Michael A. Kost ,  Mauro L. Gaetano ,  John L. Melanson

发明人： Michael A. Kost ,  Mauro L. Gaetano ,  John L. Melanson

IPC分类号： H05B41/16

CPC分类号： H05B33/0815 ,  H05B33/0824 ,  Y02B20/346

摘要： In at least one embodiment, a controller allows triac-based dimmer to properly function and dim a load whose voltage is regulated by a switching power converter. In at least one embodiment, the switching power converter includes a switch to control voltage conversion of an input voltage to the switching power converter, wherein phase delays are introduced in the input voltage by a triac-based dimmer during a dimming period. In at least one embodiment, the controller is configured to control the switch of the switching power converter to establish an input resistance of the switching power converter during a dimming portion of the input voltage, wherein the input resistance allows the triac-based dimmer to phase modulate a supply voltage to the dimmer so that an output voltage of the dimmer has a substantially uninterrupted phase delay during each half-cycle of the supply voltage during the dimming period.

摘要翻译： 在至少一个实施例中，控制器允许基于triac的调光器正确地对其电压由开关功率转换器调节的负载进行功能和调光。 在至少一个实施例中，开关功率转换器包括用于控制输入电压到开关功率转换器的电压转换的开关，其中在调光期间通过基于三端双向可控硅的调光器在输入电压中引入相位延迟。 在至少一个实施例中，控制器被配置为控制开关功率转换器的开关，以在输入电压的调光部分期间建立开关功率转换器的输入电阻，其中输入电阻允许基于triac的调光器相位 调制到调光器的电源电压，使得调光器的输出电压在调光期间的电源电压的每个半周期期间具有基本上不间断的相位延迟。

公开(公告)号：US20120112665A1

公开(公告)日：2012-05-10

申请号：US13289931

申请日：2011-11-04

申请人： John L. Melanson ,  Eric J. King

发明人： John L. Melanson ,  Eric J. King

IPC分类号： H05B37/02

CPC分类号： H05K1/0203 ,  H05B33/08 ,  H05B33/0809 ,  H05B33/0812 ,  H05B33/0815 ,  H05B33/0818 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/0845 ,  H05B33/0851 ,  H05B33/0854 ,  H05B37/02 ,  Y02B20/19 ,  Y02B20/346 ,  Y02B20/347

摘要： In at least one embodiment, a lighting system includes one, some, or all of a switch path, link path, and flyback path power dissipation circuits to actively and selectively control power dissipation of excess energy in a switching power converter of the lighting system. The flyback path power dissipation circuit dissipates power through a flyback path of the switching power converter. In at least one embodiment, the lighting system controls power dissipation through the flyback path by controlling a transformer primary current in the flyback path and, for example, limiting the primary current with a current source and dissipating power in the flyback switch and the current source.

摘要翻译： 在至少一个实施例中，照明系统包括开关路径，链路路径和反激路径功率耗散电路中的一个，一个或全部，以有源和选择性地控制照明系统的开关功率转换器中的多余能量的功率耗散。 反激路径功耗电路通过开关电源转换器的反激路径耗散功率。 在至少一个实施例中，照明系统通过控制回扫路径中的变压器初级电流来控制通过回扫路径的功率耗散，并且例如，利用电流源限制初级电流并且在回扫开关和电流源中消耗功率 。

公开(公告)号：US20120091904A1

公开(公告)日：2012-04-19

申请号：US13334411

申请日：2011-12-22

申请人： John L. Melanson

发明人： John L. Melanson

IPC分类号： H05B37/02 ,  H05B41/36

CPC分类号： H05B35/00 ,  F21Y2113/00 ,  F21Y2113/20

摘要： A lighting system and method combine at least one LED and at least one gas discharge lamp within a common housing. The lighting system includes a control system to dependently operate each LED and each gas discharge lamp during overlapping, non-identical periods of time. In at least one embodiment, the control system can provide light output by activating LEDs during gas discharge preheating operations and thus extend the useful life of each gas discharge lamp. When dimming the lighting system, the control system can reduce current to the gas discharge lamps and one or more gas discharge lamps can be phased out as dimming levels decrease. As dimming levels decrease, one or more of the LEDs can be activated or groups of LEDs can be phased in to replace the light output of the dimmed gas discharge lamps. Thus, the lighting system can reduce power consumption at low dimming levels.

摘要翻译： 照明系统和方法将至少一个LED和至少一个气体放电灯组合在公共壳体内。 照明系统包括控制系统，以在重叠，不相同的时间段内依赖地操作每个LED和每个气体放电灯。 在至少一个实施例中，控制系统可以在气体放电预热操作期间通过激活LED来提供光输出，从而延长每个气体放电灯的使用寿命。 当对照明系统进行调光时，控制系统可以减少气体放电灯的电流，并且随着调光水平的降低，一个或多个气体放电灯可以被淘汰。 随着调光水平的降低，一个或多个LED可以被激活，或者一组LED可以被定相以替代调暗气体放电灯的光输出。 因此，照明系统可以在低调光水平下降低功耗。

公开(公告)号：US20120025733A1

公开(公告)日：2012-02-02

申请号：US12894440

申请日：2010-09-30

申请人： John L. Melanson

发明人： John L. Melanson

IPC分类号： H05B41/24

CPC分类号： H02M7/06 ,  H02M1/36 ,  H02M3/33507 ,  H02M2001/0006 ,  H05B33/0815 ,  Y02B20/346 ,  Y10T307/352 ,  Y10T307/50

摘要： A single magnetic storage element is used to provide power to multiple lighting devices, which may be strings of light-emitting diodes (LEDs) of different color. A switching circuit controls alternating application of energy among the multiple lighting devices and another switching circuit may charge the primary winding to different energy levels to control the intensity of the multiple lighting devices. In particular, the multiple lighting devices may be controlled to provide a desired color profile while dimming the lighting devices, while requiring only a single magnetic storage element for supplying energy to the lighting devices.

摘要翻译： 单个磁存储元件用于为多个照明装置提供电力，这些装置可以是不同颜色的发光二极管（LED）串。 开关电路控制多个照明装置之间的能量的交替施加，另一个开关电路可以将初级绕组充电到不同的能级以控制多个照明装置的强度。 特别地，可以控制多个照明装置以在使照明装置调光的同时提供期望的颜色特征，同时仅需要单个磁存储元件来向照明装置提供能量。

公开(公告)号：US20120025724A1

公开(公告)日：2012-02-02

申请号：US13194808

申请日：2011-07-29

申请人： John L. Melanson ,  Eric J. King

发明人： John L. Melanson ,  Eric J. King

IPC分类号： H05B37/02

CPC分类号： H02M7/06 ,  H02M1/36 ,  H02M3/33507 ,  H02M2001/0006 ,  H05B33/0815 ,  Y02B20/346 ,  Y10T307/352 ,  Y10T307/50

摘要： A system and method includes a controller that is configured to coordinate (i) a low impedance path for a dimmer current, (ii), control of switch mode power conversion and (iii) an inactive state to, for example, to allow a dimmer to function normally from cycle to cycle of an alternating current (AC) supply voltage. In at least one embodiment, the dimmer functions normally when the dimmer conducts at a correct phase angle indicated by a dimmer input setting and avoids prematurely resetting while conducting. In at least one embodiment, by coordinating functions (i), (ii), and (iii), the controller controls a power converter system that is compatible with a triac-based dimmer. In at least one embodiment, the controller coordinates functions (i), (ii), and (iii) in response to a particular dimming level indicated by a phase cut, rectified input voltage supplied to the power converter system.

摘要翻译： 一种系统和方法包括控制器，其被配置为协调（i）用于调光器电流的低阻抗路径，（ii）开关模式功率转换的控制和（iii）非活动状态，以例如允许调光器 在交流（AC）电源电压的周期到周期之间正常工作。 在至少一个实施例中，当调光器以由调光器输入设置指示的正确相位角传导时，调光器正常工作，并避免在导通时过早复位。 在至少一个实施例中，通过协调功能（i），（ii）和（iii），控制器控制与基于triac的调光器兼容的功率转换器系统。 在至少一个实施例中，控制器响应由提供给功率转换器系统的相位切断的整流输入电压指示的特定调光电平来对功能（i），（ii）和（iii）进行协调。

公开(公告)号：US08014176B2

公开(公告)日：2011-09-06

申请号：US12242199

申请日：2008-09-30

申请人： John L. Melanson ,  Mauro L. Gaetano

发明人： John L. Melanson ,  Mauro L. Gaetano

IPC分类号： H02M3/335

CPC分类号： H01F38/02 ,  H01F3/10 ,  H01F3/14 ,  H01F38/08 ,  H01F2038/026 ,  H02M1/42 ,  H02M2001/0032 ,  Y02B70/12 ,  Y02B70/16

摘要： A resonant switching power converter having burst mode transitioning operates during low or zero load conditions with reduced audible noise and component stresses, while improving efficiency. Pulse bursts are generated with a beginning and/or ending pulse duration that differs from mid-burst pulse durations, in order to reduce an amplitude of transients otherwise generated at the beginning and/or end of the bursts. Alternatively, the spacing between the pulses at the beginning and/or end of the bursts may differ from the spacing between the pulses in the middle of the bursts to reduce the transient(s). A number of pulses at the beginning and/or end of the burst can also be set with gradually varying durations, to further reduce component stress and audible vibration in a transformer that couples the resonant tank to the output of the converter.

摘要翻译： 具有突发模式转换的谐振开关功率转换器在低或零负载条件下操作，同时提高效率，同时具有降低的可听噪声和分量应力。 产生具有不同于脉冲串脉冲持续时间的开始和/或结束脉冲持续时间的脉冲脉冲串，以便减少在脉冲串的开始和/或结束时另外产生的瞬变幅度。 或者，脉冲串的开始和/或结束处的脉冲之间的间隔可能与脉冲串中间的脉冲之间的间隔不同，以减少瞬态。 在脉冲串的开始和/或结束处的脉冲数也可以设定为具有逐渐变化的持续时间，以进一步降低将谐振回路耦合到转换器的输出端的变压器中的分量应力和可听振动。

公开(公告)号：US08008902B2

公开(公告)日：2011-08-30

申请号：US12145807

申请日：2008-06-25

申请人： John L. Melanson ,  Lei Ding

发明人： John L. Melanson ,  Lei Ding

IPC分类号： G05F1/42

CPC分类号： H02M3/1563 ,  H02M2001/0019 ,  H02M2001/0032 ,  Y02B70/16

摘要： A hysteretic buck converter provides improved regulation control, in particular for buck converter standby operation. A comparison circuit compares the output voltage of the buck converter to a waveform that is generated from an indication of the output current of the converter, so that the turn-on time of the converter is advanced as the output current demand increases. The resulting action anticipates a reduction in output voltage due to the increased current, preventing an excursion of the output voltage below the ripple voltage minimum. The turn-off time of the converter is controlled by an upper threshold that limits the ripple voltage maximum. The output current indication may be a measurement of output current, or may be a dynamic value calculated from the input voltage and the output voltage waveform.

摘要翻译： 迟滞降压转换器提供改进的调节控制，特别是对于降压转换器待机操作。 比较电路将降压转换器的输出电压与从转换器的输出电流的指示产生的波形进行比较，使得转换器的导通时间随着输出电流需求的增加而提前。 所产生的动作预期由于增加的电流而导致的输出电压降低，防止输出电压偏离低于纹波电压的最小值。 转换器的关断时间由限制纹波电压最大值的上限阈值控制。 输出电流指示可以是输出电流的测量值，或者可以是从输入电压和输出电压波形计算出的动态值。

公开(公告)号：US08008898B2

公开(公告)日：2011-08-30

申请号：US12242298

申请日：2008-09-30

申请人： John L. Melanson ,  Mauro L. Gaetano ,  Karl Thompson

发明人： John L. Melanson ,  Mauro L. Gaetano ,  Karl Thompson

IPC分类号： G05F1/613

CPC分类号： H02M3/156 ,  H02M2001/0006 ,  Y10S323/901

摘要： A boosted auxiliary winding power supply for a switched-power converter circuit provides operating voltage for control and other circuits early in the start-up phase of converter operation. A boost circuit has an input coupled to the auxiliary winding to boost the voltage available from the auxiliary winding at least during start-up of the switched-power converter. The boost thereby provides a voltage that is greater than the voltage across the auxiliary winding during start-up of the switched-power converter. The boost circuit may be actively switched at a rate higher than a switching rate of the switched-power converter, to increase a rate of rise of the operating voltage. Polarity information, which may be provided from the switched-power converter control circuit, can be used to actively rectify the output of the auxiliary winding.

摘要翻译： 用于开关电源转换器电路的升压辅助绕组电源在转换器运行的启动阶段的早期提供控制和其他电路的工作电压。 升压电路具有耦合到辅助绕组的输入，以至少在开关功率转换器的启动期间升高从辅助绕组可用的电压。 因此，在开关功率转换器的启动期间，升压提供大于辅助绕组上的电压的电压。 升压电路可以以高于开关功率转换器的开关速率的速率主动切换，以增加工作电压的上升速率。 可以从开关电源转换器控制电路提供的极性信息可用于主动地校正辅助绕组的输出。

公开(公告)号：US20110075723A1

公开(公告)日：2011-03-31

申请号：US12909262

申请日：2010-10-21

申请人： John L. Melanson ,  Xiaofan Fei ,  Johann G. Gaboriau ,  Steven Green ,  Jason P. Rhode ,  Eric Walburger ,  Wilson E. Taylor, JR.

发明人： John L. Melanson ,  Xiaofan Fei ,  Johann G. Gaboriau ,  Steven Green ,  Jason P. Rhode ,  Eric Walburger ,  Wilson E. Taylor, JR.

IPC分类号： H03K9/08

CPC分类号： H03F3/2175 ,  H03F1/52 ,  H03F3/2173 ,  H03F2200/331 ,  H03F2200/447

摘要： A thermal sensor at the output of a switching amplifier senses heat dissipation at the output switch. If an overheating condition is sensed, gain of the digital input signal is lowered to reduce output power of the audio output signal.

摘要翻译： 开关放大器输出端的热传感器感测输出开关的散热。 如果感测到过热状况，数字输入信号的增益被降低以降低音频输出信号的输出功率。