发明名称 |
Dimmer compatibility with reactive loads |
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. |
申请公布号 |
US8749173(B1) |
申请公布日期 |
2014.06.10 |
申请号 |
US201113194699 |
申请日期 |
2011.07.29 |
申请人 |
Cirrus Logic, Inc. |
发明人 |
Melanson John L.;King Eric J.;Grisamore Robert T.;Azrai Firas S. |
分类号 |
H05B41/36;G05F1/00 |
主分类号 |
H05B41/36 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method comprising:
during an OFF mode of a dimmer, alternately enabling at least two different current paths for a current flowing through the dimmer, wherein two of the current paths comprise a low impedance path to a reference node and a path to a voltage supply node of a switching power converter controller; and during a dimming mode of the dimmer, controlling power conversion by a power converter.
|
地址 |
Austin TX US |