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。

公开(公告)号：US08536799B1

公开(公告)日：2013-09-17

申请号：US13077483

申请日：2011-03-31

申请人： Robert T. Grisamore ,  Firas S. Azrai ,  Mohit Sood ,  John L. Melanson ,  Eric J. King ,  Jean-Charles Pina

发明人： Robert T. Grisamore ,  Firas S. Azrai ,  Mohit Sood ,  John L. Melanson ,  Eric J. King ,  Jean-Charles Pina

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  G01R19/0046 ,  H05B33/0848 ,  H05B37/0218 ,  H05B37/0263 ,  Y02B20/346

摘要： In at least one embodiment, a lighting system receives an input signal, such as a supply voltage, that can be affected by a dimmer. The supply voltage can be affected by a dimmer when, for example, a dimmer phase cut (i.e. chopped) the supply voltage. A dimmer detection system of the lighting system determines if a dimmer is affecting the supply voltage. In at least one embodiment, the dimmer detection system also determines a type of the dimmer, such as detecting if the dimmer is a leading edge or trailing edge dimmer. In at least one embodiment, the dimmer detection system provides dimmer type data to one or more other circuits such as a switching power converter controller. The one or more other circuits utilize the dimmer type data to affect their operation.