Invention Grant
- Patent Title: Systems and methods for low-power lamp compatibility with a trailing-edge dimmer and an electronic transformer
- Patent Title (中): 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
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Application No.: US14039355Application Date: 2013-09-27
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Publication No.: US09215770B2Publication Date: 2015-12-15
- Inventor: Poornima Mazumdar , Michael A. Kost , Yanhui Xie , Sahil Singh
- Applicant: Cirrus Logic, Inc.
- Applicant Address: NL Eindhoven
- Assignee: Philips International, B.V.
- Current Assignee: Philips International, B.V.
- Current Assignee Address: NL Eindhoven
- Agency: Jackson Walker L.L.P.
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08

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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