Invention Grant
US09215770B2 Systems and methods for low-power lamp compatibility with a trailing-edge dimmer and an electronic transformer 有权
与后缘调光器和电子变压器的低功率灯兼容性的系统和方法

Systems and methods for low-power lamp compatibility with a trailing-edge dimmer and an electronic transformer
Abstract:
A controller may be configured to: (i) predict based on an electronic transformer secondary signal an estimated occurrence of a high-resistance state of a trailing-edge dimmer coupled to a primary winding of an electronic transformer, wherein the high-resistance state occurs when the trailing-edge dimmer begins phase-cutting an alternating current voltage signal; (ii) operate a power converter in a trailing-edge exposure mode for a first period of time immediately prior to the estimated occurrence of the high-resistance state, such that the power converter is enabled to transfer energy from the secondary winding to the load during the trailing-edge exposure mode; and (iii) operate the power converter in a power mode for a second period of time prior to and non-contiguous with the first period of time, such that the power converter is enabled to transfer energy from the secondary winding to the load during the power mode.
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