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1. 发明授权

US10263532B2 Multiple power sources for a switching power converter controller 有权
公开(公告)号：US10263532B2
公开(公告)日：2019-04-16
申请号：US13077421
申请日：2011-03-31
申请人： John L. Melanson , Eric J. King
发明人： John L. Melanson , Eric J. King
IPC分类号： H02M3/22 , H02M7/06 , H02M1/36 , H05B33/08 , H02M3/335 , H02M1/00
摘要： An electronic system includes two power supplies to supply an operating voltage to a switching power converter. The first power supply, referred to as a start-up power supply, includes a first source follower transistor to conduct a start-up current for a controller and supply an operating voltage for the controller. The controller controls operation of the switching power converter. A second power supply, referred to as an auxiliary power supply, includes a second source follower transistor to conduct a steady-state operational current for the controller and supply an operating voltage for the controller. In at least one embodiment, once the second power supply begins supplying the operating voltage to the controller, the start-up power supply automatically ceases supplying the start-up current to the controller.

2. 发明授权

US09307601B2 Input voltage sensing for a switching power converter and a triac-based dimmer 有权
标题翻译：开关电源转换器和基于triac的调光器的输入电压检测
公开(公告)号：US09307601B2
公开(公告)日：2016-04-05
申请号：US13539004
申请日：2012-06-29
申请人： Zhaohui He , Rahul Singh , Eric J. King , John L. Melanson , William A. Draper
发明人： Zhaohui He , Rahul Singh , Eric J. King , John L. Melanson , William A. Draper
IPC分类号： H05B37/00 , H05B33/08
CPC分类号： H05B33/0848 , H05B33/0815 , Y02B20/346
摘要： An electronic lighting system and method described herein control energy provided to an electronic lighting device, such as one or more light-emitting diodes (LEDs) and/or compact fluorescent lamps (CFLs), of the electronic lighting system. A triac-based dimmer phase cuts a line voltage provided to the electronic lighting system. A controller of the electronic lighting system utilizes a probing system to overcome idiosyncrasies of the triac-based dimmer to allow the controller to probe and sense the line voltage. To reduce energy consumption, rather than probing each cycle of the output voltage of the triac-based dimmer, the controller periodically or intermittently probes the output voltage of the triac-based dimmer.
摘要翻译：本文所述的电子照明系统和方法控制提供给诸如电子照明系统的一个或多个发光二极管（LED）和/或紧凑型荧光灯（CFL）的电子照明装置的能量。三端双向可控硅开关控制器的调光器相位切断提供给电子照明系统的线路电压。电子照明系统的控制器利用探测系统来克服基于triac的调光器的特性，以允许控制器探测和感测线路电压。为了降低能耗，而不是探测基于三端双向可控硅的调光器的输出电压的每个周期，控制器周期性或间歇地探测基于三端双向可控硅的调光器的输出电压。

3. 发明申请

US20150327339A1 LED (LIGHT-EMITTING DIODE) STRING DERIVED CONTROLLER POWER SUPPLY 有权
公开(公告)号：US20150327339A1
公开(公告)日：2015-11-12
申请号：US14801440
申请日：2015-07-16
申请人： John L. Melanson , Eric King , Rahul Singh
发明人： John L. Melanson , Eric King , Rahul Singh
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0824 , H05B33/0827 , H05B33/083 , H05B33/0845 , H05B37/02 , H05B39/047 , H05B41/28 , H05B41/2827 , Y02B20/345 , Y02B20/346 , Y02B20/347
摘要： 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.

4. 发明授权

US09119262B2 Boost and linear LED control 有权
公开(公告)号：US09119262B2
公开(公告)日：2015-08-25
申请号：US14607412
申请日：2015-01-28
申请人： John L. Melanson , William Draper
发明人： John L. Melanson , William Draper
IPC分类号： H05B33/08 , H05B41/28
CPC分类号： H05B33/0851 , H05B33/0803 , H05B33/0815 , H05B33/0821 , H05B33/0824 , H05B41/28 , Y02B20/347
摘要： A light emitting diode (LED) lighting system includes a switching power converter having an input for coupling to an alternating current (AC) power source, an output, and a switch. The LED lighting system also includes an LED lighting subsystem coupled to receive power from the output of the switching power converter. The LED lighting subsystem includes a current source for one or more LEDs, and the current source has a control node and a sense node. The LED lighting system additionally includes a switch state controller coupled to the switching power converter and coupled to the LED lighting subsystem. The switch state controller controls switching of the switch and varies a control current provided to the control node of the current source based on at least a parameter sensed from the sense node.

5. 发明授权

US08749173B1 Dimmer compatibility with reactive loads 有权
标题翻译：调光器与无功负载的兼容性
公开(公告)号：US08749173B1
公开(公告)日：2014-06-10
申请号：US13194699
申请日：2011-07-29
申请人： John L. Melanson , Eric J. King , Robert T. Grisamore , Firas S. Azrai
发明人： John L. Melanson , Eric J. King , Robert T. Grisamore , Firas S. Azrai
IPC分类号： H05B41/36 , G05F1/00
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 alternately enables at least two different current paths for a current flowing through a dimmer when the dimmer is in an OFF mode. In at least one embodiment, enabling and disabling the current paths allows a power supply of the dimmer to continue functioning and provides the controller sufficient voltage to continue functioning. One of the current paths is a low impedance path and another current path is a path to a voltage supply node of a switching power converter controller. In at least one embodiment, the controller generates an impedance control signal to enable a low impedance current path for a current in the dimmer and alternately provide a current path to the voltage supply node for the controller.
摘要翻译：一种系统和方法包括控制器，当调光器处于关闭模式时，控制器交替地使流过调光器的电流至少两个不同的电流路径。在至少一个实施例中，启用和禁用当前路径允许调光器的电源继续工作，并为控制器提供足够的电压以继续工作。电流路径中的一个是低阻抗路径，另一个电流路径是到开关功率转换器控制器的电压供应节点的路径。在至少一个实施例中，控制器产生阻抗控制信号，以使能用于调光器中的电流的低阻抗电流路径，并交替地向控制器的电压供应节点提供电流路径。

6. 发明授权

US08729811B2 Dimming multiple lighting devices by alternating energy transfer from a magnetic storage element 有权
标题翻译：通过从磁存储元件交替传递能量来调光多个照明装置
公开(公告)号：US08729811B2
公开(公告)日：2014-05-20
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： H05B37/02 , H05B37/00
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。

7. 发明授权

US08593075B1 Constant current controller with selectable gain 有权
标题翻译：具有可选增益的恒流控制器
公开(公告)号：US08593075B1
公开(公告)日：2013-11-26
申请号：US13174404
申请日：2011-06-30
申请人： John L. Melanson , Rahul Singh , Siddharth Maru
发明人： John L. Melanson , Rahul Singh , Siddharth Maru
IPC分类号： H05B37/00
CPC分类号： H05B33/0815 , Y02B20/347
摘要： A power distribution system includes a selectable gain value to generate a duty cycle modulated control signal to control current supplied to a load. In at least one embodiment, the power distribution system includes a controller and a switch, and the controller generates the duty cycle modulated control signal to control conductivity of the switch. The duty cycle modulated control signal has a period and a pulse width. In at least one embodiment, the controller determines the period of the control signal as a function of a peak allowable link current value (also referred to as a peak allowable output current value) of a switching power converter, an inductor flyback time of the switching power converter, and the gain value. The link current provides current to a load, such as a lighting system that includes light emitting diodes.
摘要翻译：配电系统包括可选择的增益值，以产生占空比调制控制信号以控制提供给负载的电流。在至少一个实施例中，配电系统包括控制器和开关，并且控制器产生占空比调制控制信号以控制开关的电导率。占空比调制控制信号具有周期和脉冲宽度。在至少一个实施例中，控制器将控制信号的周期确定为开关功率转换器的峰值允许链路电流值（也称为峰值可允许输出电流值）的函数，开关的电感器反激时间功率转换器和增益值。链路电流向负载提供电流，例如包括发光二极管的照明系统。

8. 发明授权

US08536854B2 Supply invariant bandgap reference system 有权
标题翻译：提供不变带隙参考系
公开(公告)号：US08536854B2
公开(公告)日：2013-09-17
申请号：US12894472
申请日：2010-09-30
申请人： John L. Melanson , Prashanth Drakshapalli , Larry L. Harris
发明人： John L. Melanson , Prashanth Drakshapalli , Larry L. Harris
IPC分类号： G05F3/28
CPC分类号： G05F3/30
摘要： An electronic reference-signal generation system includes a supply invariant bandgap reference system that generates one or more bandgap reference signals that are substantially unaffected by bulk error currents. In at least one embodiment, the bandgap reference generates a substantially invariant bandgap reference signals for a range of direct current (DC) supply voltages. Additionally, in at least one embodiment, the bandgap reference system provides substantially invariant bandgap reference signals when the supply voltage varies due to alternating current (AC) voltages. In at least one embodiment, the bandgap reference system generates a bandgap reference voltage VBG, a “proportional to absolute temperature” (PTAT) current (“iPTAT”) and a “zero dependency on absolute temperature” (ZTAT) current (“iZTAT”) that are substantially unaffected by variations in the supply voltage and unaffected by a bulk error current.
摘要翻译：电子参考信号生成系统包括供应不变带隙基准系统，其产生基本上不受体积误差电流影响的一个或多个带隙参考信号。在至少一个实施例中，带隙参考产生用于一系列直流（DC）电源电压的基本上不变的带隙基准信号。另外，在至少一个实施例中，当电源电压由于交流（AC）电压而变化时，带隙基准系统提供基本上不变的带隙基准信号。在至少一个实施例中，带隙参考系统产生带隙参考电压VBG，“与绝对温度成比例”（PTAT）电流（“iPTAT”）和“对绝对温度的零依赖”（ZTAT）电流（“iZTAT” ），其基本上不受电源电压的变化影响并且不受体错误电流的影响。

9. 发明授权

US08536794B2 Lighting system with lighting dimmer output mapping 有权
公开(公告)号：US08536794B2
公开(公告)日：2013-09-17
申请号：US12474714
申请日：2009-05-29
申请人： John L. Melanson , John J. Paulos
发明人： John L. Melanson , John J. Paulos
IPC分类号： H05B37/02
CPC分类号： H05B37/0209 , H05B33/0809 , H05B33/0848 , H05B37/02
摘要： A system and method map dimming levels of a lighting dimmer to light source control signals using a predetermined lighting output function. The dimmer generates a dimmer output signal value. At any particular period of time, the dimmer output signal value represents one of multiple dimming levels. In at least one embodiment, the lighting output function maps the dimmer output signal value to a dimming value different than the dimming level represented by the dimmer output signal value. The lighting output function converts a dimmer output signal values corresponding to measured light levels to perception based light levels. A light source driver operates a light source in accordance with the predetermined lighting output function. The system and method can include a filter to modify at least a set of the dimmer output signal values prior to mapping the dimmer output signal values to a new dimming level.

10. 发明授权

US08525710B1 Audio amplifier offset reduction using digital input/output comparisons 有权
标题翻译：使用数字输入/输出比较的音频放大器偏移量减少
公开(公告)号：US08525710B1
公开(公告)日：2013-09-03
申请号：US12750973
申请日：2010-03-31
申请人： Robin Matthew Tsang , Eric J. Swanson , John L. Melanson , John Christopher Tucker
发明人： Robin Matthew Tsang , Eric J. Swanson , John L. Melanson , John Christopher Tucker
IPC分类号： H03M1/06 , H03M1/66 , H03F99/00
CPC分类号： H03M1/0607 , H03F3/45475 , H03F3/45968 , H03F2203/45522 , H03F2203/45528 , H03M1/66 , H03M3/50
摘要： An offset correction circuit removes DC offset from an analog audio output signal by comparing transitions of digital audio values to which the analog output signal is related to the output of a monitor that monitors the analog output signal. The monitor may be a zero-crossing detector and the transitions of the digital signal that are compared may be transitions of the most-significant bit (MSB) of the digital audio values. A filtering algorithm or filter circuit may be used to average a result of the comparison of the transitions, so that the offset is slowly and accurately removed. A chopped or autozero comparator may be used to further reduce error in the offset determination.
摘要翻译：偏移校正电路通过比较模拟输出信号与监视模拟输出信号的监视器的输出相关的数字音频值的转换，从模拟音频输出信号中去除DC偏移。监视器可以是过零检测器，并且被比较的数字信号的转变可以是数字音频值的最高有效位（MSB）的转换。可以使用滤波算法或滤波器电路来平均转换的比较的结果，使得偏移被缓慢且精确地去除。可以使用斩波或自动调零比较器来进一步减少偏移确定中的误差。

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