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31. 发明授权

US07894216B2 Switching power converter with efficient switching control signal period generation 有权
标题翻译：开关电源转换器具有高效的开关控制信号周期产生
公开(公告)号：US07894216B2
公开(公告)日：2011-02-22
申请号：US12114147
申请日：2008-05-02
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H02M3/335
CPC分类号： H02M1/4225 , H03M3/476 , Y02B70/126 , Y02P80/112
摘要： A power control system includes a switching power converter and a controller, and the controller responds to a time-varying voltage source signal by generating a switch control signal having a period that varies in accordance with at least one of the following: (i) the period of the switch control signal trends inversely to estimated power delivered to a load coupled to the switching power converter, (ii) the period of the switch control signal trends inversely to instantaneous voltage levels of the voltage source signal, and (iii) the period of the switch control signal trends directly with a line voltage level of the time-varying voltage source signal. In at least one embodiment, the controller achieves an efficient correlation between the switching period with associated switching losses and the instantaneous power transferred to the switching power converter while providing power factor correction (PFC).
摘要翻译：功率控制系统包括开关功率转换器和控制器，并且控制器通过产生具有根据以下至少一个而变化的周期的开关控制信号来响应时变电压源信号：（i）开关控制信号的周期与传送到耦合到开关功率转换器的负载的估计功率成反比，（ii）开关控制信号的周期与电压源信号的瞬时电压电平成反比，以及（iii）周期的开关控制信号趋势直接与时变电压源信号的线路电压电平。在至少一个实施例中，控制器在提供功率因数校正（PFC）的同时，在相关的开关损耗的开关周期与传送到开关功率转换器的瞬时功率之间实现有效的相关性。

32. 发明授权

US07863828B2 Power supply DC voltage offset detector 有权
标题翻译：电源直流电压偏移检测器
公开(公告)号：US07863828B2
公开(公告)日：2011-01-04
申请号：US11967277
申请日：2007-12-31
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H05B41/16
CPC分类号： H02M1/4225 , H03M3/476 , Y02B70/126 , Y02P80/112
摘要： A power supply output voltage direct current (DC) offset detector determines a DC offset in a power supply output voltage signal, and the output voltage signal has a DC component and an alternating current (AC) “ripple” component. Once during each period of the ripple, the DC offset detector determines the DC offset from an output voltage signal using a comparison between the output voltage signal and a reference voltage. In at least one embodiment, from the comparison and during a period of the ripple, the DC offset detector determines an ‘above’ duration for which the ripple is above the reference voltage, determines a ‘below’ duration for which the ripple is below the reference voltage, or both to determine the DC offset of the power supply output voltage signal. The DC offset detector uses the above and/or below duration(s) to determine the DC offset of the output voltage signal.
摘要翻译：电源输出电压直流（DC）偏移检测器确定电源输出电压信号中的直流偏移，输出电压信号具有直流分量和交流（AC）“纹波”分量。一旦在纹波的每个周期期间，直流偏移检测器使用输出电压信号和参考电压之间的比较来确定来自输出电压信号的直流偏移。在至少一个实施例中，从比较起，在纹波周期期间，直流偏移检测器确定纹波高于参考电压的“高于”持续时间，确定纹波低于参考电压或两者以确定电源输出电压信号的直流偏移。 DC偏移检测器使用上述和/或以下持续时间来确定输出电压信号的DC偏移。

33. 发明申请

US20100327838A1 SWITCHING POWER CONVERTER WITH CURRENT SENSING TRANSFORMER AUXILIARY POWER SUPPLY 有权
标题翻译：使用电流感应变压器辅助电源切换电源转换器
公开(公告)号：US20100327838A1
公开(公告)日：2010-12-30
申请号：US12495648
申请日：2009-06-30
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： G05F3/02
CPC分类号： H02M3/156 , H02M2001/0006 , H02M2001/0009
摘要： A switching power converter having a current sensing transformer providing input to an auxiliary power supply provides efficient current sensing, while reducing the cost of the magnetic coupling element. The auxiliary power supply and current sense circuit both receive input from a secondary winding of a current sensing transformer having a primary winding coupled in series with the converter's main magnetic coupling element. To provide accurate sensing, the magnetization the current sensing transformer is accounted for. The magnetization is compensated for in the current sensing result, current sensing is performed during a part of the cycle in which charging of the auxiliary power supply is disabled, or the core of the current sensing transformer is made large, raising its mutual inductance. In another alternative technique, a circuit node can be pre-charged to a value that cancels the offset due to the magnetization current.
摘要翻译：具有向辅助电源提供输入的电流感测变压器的开关功率转换器提供有效的电流感测，同时降低磁耦合元件的成本。辅助电源和电流感测电路都接收来自具有与转换器主磁耦合元件串联耦合的初级绕组的电流感测变压器的次级绕组的输入。为了提供精确的感测，电流感应变压器的磁化被考虑。在电流感测结果中补偿磁化，在辅助电源的充电禁用或电流感应变压器的铁芯变大的周期的一部分期间进行电流感测，提高其互感。在另一种替代技术中，电路节点可以被预充电到由于磁化电流而抵消偏移的值。

34. 发明申请

US20100308742A1 Power Control System for Current Regulated Light Sources 有权
标题翻译：电流调节光源功率控制系统
公开(公告)号：US20100308742A1
公开(公告)日：2010-12-09
申请号：US12858004
申请日：2010-08-17
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0818 , Y02B20/347 , Y10S315/04
摘要： A light emitting diode (LED) lighting system includes a PFC and output voltage controller and a LED lighting power system. The controller advantageously operates from an auxiliary voltage less than a link voltage generated by the LED lighting power system. The common reference voltage allows all the components of lighting system to work together. A power factor correction switch and an LED drive current switch are coupled to the common reference node and have control node-to-common node, absolute voltage that allows the controller to control the conductivity of the switches. The LED lighting system can utilize feed forward control to concurrently modify power demand by the LED lighting power system and power demand of one or more LEDs. The LED lighting system can utilize a common current sense device to provide a common feedback signal to the controller representing current in at least two of the LEDs.
摘要翻译：发光二极管（LED）照明系统包括PFC和输出电压控制器以及LED照明电源系统。控制器有利地从小于由LED照明电力系统产生的链路电压的辅助电压进行操作。公共参考电压允许照明系统的所有组件一起工作。功率因数校正开关和LED驱动电流开关耦合到公共参考节点并具有控制节点到公共节点，允许控制器控制开关的电导率的绝对电压。 LED照明系统可以利用前馈控制来同时修改LED照明电源系统的功率需求和一个或多个LED的功率需求。 LED照明系统可以利用公共电流检测装置向控制器提供公共反馈信号，该控制器表示至少两个LED中的电流。

35. 发明授权

US07825845B1 Digital output semiconductor magnetic field sensor integrated circuit 有权
标题翻译：数字输出半导体磁场传感器集成电路
公开(公告)号：US07825845B1
公开(公告)日：2010-11-02
申请号：US11685324
申请日：2007-03-13
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H03M1/12
CPC分类号： G01R33/0023 , G01R33/07 , H03M3/456
摘要： A digital output semiconductor magnetic field sensor integrated circuit provides a low-cost and dense packaging solution for providing digital indicators of magnetic field magnitudes. A delta-sigma modulator based analog-to-digital converter (ADC) is integrated on a die with a semiconductor magnetic field sensor. The delta-sigma modulator provides for noise-shaping the sensor output and the co-location of the sensor and the converter on the die provides for improved noise immunity. The current loops of the ADC and digital interface are made as small as possible and are disposed on the die so that they are orthogonal to the axis of the magnetic field sensor, so that noise from the converter operation is isolated from the sensor.
摘要翻译：数字输出半导体磁场传感器集成电路提供了低成本且致密的封装解决方案，用于提供磁场幅度的数字指示器。基于Δ-Σ调制器的模数转换器（ADC）集成在具有半导体磁场传感器的管芯上。 Δ-Σ调制器提供对传感器输出的噪声整形，并且传感器和转换器在芯片上的共同位置提供了改进的抗噪声性能。 ADC和数字接口的电流环路尽可能小，并且被放置在芯片上，使得它们与磁场传感器的轴线正交，从而来自转换器操作的噪声与传感器隔离。

36. 发明申请

US20100253305A1 SWITCHING POWER CONVERTER CONTROL WITH SPREAD SPECTRUM BASED ELECTROMAGNETIC INTERFERENCE REDUCTION 有权
标题翻译：使用基于频谱的电磁干扰降低开关电源转换器控制
公开(公告)号：US20100253305A1
公开(公告)日：2010-10-07
申请号：US12781669
申请日：2010-05-17
申请人： John L. Melanson , Michael A. Kost
发明人： John L. Melanson , Michael A. Kost
IPC分类号： G05F1/46
CPC分类号： H03K7/08 , H02M1/4225 , H02M1/44 , Y02B70/126
摘要： Power control systems generate electromagnetic interference (EMI). In at least one embodiment, a power control system includes a switching power converter and a controller that utilizes a spread spectrum strategy to reduce peak EMI values of the power control system. The controller generates a power regulation, switch control signal to control an input voltage to output voltage conversion by the switching power converter. The controller modulates the period of the control signal in accordance with the spread spectrum strategy. The spread spectrum strategy is an intentional plan to spread the spectrum of the control signal to reduce peak EMI values, and, thus, reduce the potential for degradation in performance, a malfunction, or failure of an electronic circuit caused by the EMI. The controller also modulates a pulse width of the switch control signal in response to modulation of the period of the control signal to provide power factor correction.
摘要翻译：电源控制系统产生电磁干扰（EMI）。在至少一个实施例中，功率控制系统包括开关功率转换器和利用扩展频谱策略来降低功率控制系统的峰值EMI值的控制器。控制器产生功率调节，开关控制信号，以控制输入电压，由开关电源转换器输出电压转换。控制器根据扩频策略调制控制信号的周期。扩频策略是扩展控制信号的频谱以降低EMI值的有意图，从而降低由EMI引起的性能下降，故障或电子电路故障的可能性。控制器还响应于控制信号的周期的调制来调制开关控制信号的脉冲宽度，以提供功率因数校正。

37. 发明申请

US20100244726A1 PRIMARY-SIDE BASED CONTROL OF SECONDARY-SIDE CURRENT FOR A TRANSFORMER 有权
标题翻译：用于变压器的二次侧电流的主要侧控制
公开(公告)号：US20100244726A1
公开(公告)日：2010-09-30
申请号：US12415830
申请日：2009-03-31
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H05B37/02
CPC分类号： H02M3/33523 , H05B33/0815 , H05B33/0851
摘要： A power control system includes a transformer and a controller regulates a current on a secondary-side of the transformer based on a primary-side signal value. In at least one embodiment, the secondary-side current is a current out of a filter coupled to a rectifier and the secondary-side of the transformer and into a load. In at least one embodiment, the primary-side signal value is a sample of a current in the primary-side windings of the transformer. In at least one embodiment, the primary-side signal value represents a sample value of a primary-side transformer current. Proper timing of sampling the primary-side signal value substantially eliminates contributions of a transformer magnetizing current from the primary-side transformer current sample. Sampling the primary-side signal value when contributions of the transformer magnetizing current are substantially eliminated allows at least an average of the secondary-side current to be determined from the primary-side signal value.
摘要翻译：功率控制系统包括变压器和控制器，其基于初级侧信号值来调节变压器次级侧的电流。在至少一个实施例中，次级侧电流是耦合到整流器的滤波器和变压器的次级侧的负载中的电流。在至少一个实施例中，初级侧信号值是变压器的初级侧绕组中的电流的采样。在至少一个实施例中，初级侧信号值表示初级侧变压器电流的采样值。初级侧信号值的正确采样时间基本上消除了来自初级侧变压器电流样本的变压器磁化电流的贡献。当变压器励磁电流的贡献基本上消除时对初级侧信号值进行取样允许根据初级侧信号值确定次级侧电流的平均值。

38. 发明授权

US07804697B2 History-independent noise-immune modulated transformer-coupled gate control signaling method and apparatus 有权
标题翻译：历史无关噪声免疫调制变压器耦合门控信号的方法和装置
公开(公告)号：US07804697B2
公开(公告)日：2010-09-28
申请号：US12164217
申请日：2008-06-30
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H02M3/335 , H02M5/40
CPC分类号： H03K17/691 , H03K17/08128
摘要： A history-independent and noise-immune modulated transformer-coupled gate control signaling method and apparatus provides robust design characteristics in switching power circuits having a transformer-coupled gate drive. A modulated control signal at a rate substantially higher than the switching circuit gate control rate is provided from the controller circuit to a demodulator via transformer coupling. Codes specified by relative timing of transitions in multiple periods of the modulated control are assigned to gate-on and gate-off timing events that control the switching transistor gate(s) and unassigned patterns are decoded as gate-off events, reducing the possibility that a switching transistor will be erroneously activated due to noise. The modulated signal is constructed so that signal history is not required for decoding, eliminating any requirement of a reference clock. Blanking may be employed to conserve power between codes and to avoid mis-triggering due to noise events during power switching.
摘要翻译：具有历史无关和无噪声调制的变压器耦合门控信号方法和装置在具有变压器耦合栅极驱动的开关电源电路中提供鲁棒的设计特性。通过变压器耦合，从控制器电路向解调器提供基本上高于开关电路门控制速率的调制控制信号。通过调制控制的多个周期中的转换的相对定时指定的代码被分配给控制开关晶体管栅极和未分配图案的栅极导通和栅极截止定时事件被解码为栅极断开事件，从而降低了开关晶体管将由于噪声而被错误地激活。调制信号被构造成使得信号历史不需要用于解码，消除了参考时钟的任何要求。可以采用消隐来节省代码之间的功率，并且避免在功率切换期间由于噪声事件引起的误触发。

39. 发明授权

US07759881B1 LED lighting system with a multiple mode current control dimming strategy 有权
标题翻译： LED照明系统具有多模电流控制调光策略
公开(公告)号：US07759881B1
公开(公告)日：2010-07-20
申请号：US12058971
申请日：2008-03-31
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0848 , Y02B20/347
摘要： A light emitting diode (LED) lighting system includes a controller to control current in one or more LEDs in response to a dimming level input. The LED lighting system implements a dimming strategy having two modes of operation that allow the LED lighting system to dim the LEDs using an active value of an LED current less than a full value LED current while maintaining continuous conduction mode operation. In an active value varying mode of operation, the controller varies an active value of the LED current for a first set of dimming levels. In an active value, duty cycle modulation mode of operation, the controller duty cycle modulates an active value of the LED current for a second set of dimming levels. In at least one embodiment, the active value of the LED current varies from a full active value to an intermediate active value as dimming levels decrease.
摘要翻译：发光二极管（LED）照明系统包括控制器，用于响应于调光电平输入来控制一个或多个LED中的电流。 LED照明系统实现了具有两种操作模式的调光策略，其允许LED照明系统使用小于全值LED电流的LED电流的有效值来调光LED，同时保持连续导通模式操作。在有效值变化操作模式中，控制器改变第一组调光电平的LED电流的有效值。在有效值中，占空比调制操作模式，控制器占空比对第二组调光电平调节LED电流的有效值。在至少一个实施例中，当调光水平降低时，LED电流的有效值从完全有效值变化到中间有效值。

40. 发明申请

US20100171442A1 Light Emitting Diode Based Lighting System With Time Division Ambient Light Feedback Response 有权
标题翻译：基于发光二极管的照明系统，具有时分的环境光反馈响应
公开(公告)号：US20100171442A1
公开(公告)日：2010-07-08
申请号：US12495206
申请日：2009-06-30
申请人： William A. Draper , John L. Melanson
发明人： William A. Draper , John L. Melanson
IPC分类号： H05B37/02
CPC分类号： H05B33/0869 , H05B33/0872
摘要： A lighting system includes time division light output sensing and adjustment for ambient light. In at least one embodiment, time division light output sensing involves modulating power to a light emitting diode (LED) set, and the set of LEDs includes one or more LEDs. In at least one embodiment, each LED in the LED set is included in a single lamp, and, in at least one embodiment, the set of LEDs is contained in multiple lamps. In at least one embodiment, for each lamp, a controller modulates power to the LED set by selectively reducing power to the LED set using time division algorithm to allow a light sensor to sense the brightness of ambient light with a reduced contribution from the LED set. In at least one embodiment, a lighting system also includes time division light output sensing and adjustment for different spectra LEDs.
摘要翻译：照明系统包括对于环境光的时分光输出感测和调整。在至少一个实施例中，时分光输出感测涉及调制发光二极管（LED）组的功率，并且该组LED包括一个或多个LED。在至少一个实施例中，LED组中的每个LED包括在单个灯中，并且在至少一个实施例中，该组LED包含在多个灯中。在至少一个实施例中，对于每个灯，控制器通过使用时分算法选择性地降低对LED组的功率来调制LED组的功率，以允许光传感器以来自LED组的减少的贡献来感测环境光的亮度。在至少一个实施例中，照明系统还包括用于不同光谱LED的时分光输出感测和调整。

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