A new double frequency dimmer for lighting device

This paper proposes a new double frequency dimmer for lighting devices, especially for fluorescent lamps and light-emitting diodes (LEDs). Compared with the conventional phase-controlled TRIAC dimmer, dummy load or bleeder resistor is not required in the new double frequency dimmer, moreover, there is no R-C delay circuit in the proposed dimmer, and hence, some lighting flicker phenomena caused by the R-C delay circuit can be avoided. The biggest feature of the proposed dimmer is that the frequency of the output of the dimmer is twice than that of the TRIAC dimmer, which will eliminate the lighting flicker caused by line frequency operation in some cases and may filer capacitor requirement of the AC/DC converter.

[1]  Andre Tjokrorahardjo,et al.  Simple triac dimmable Compact Fluorescent Lamp ballast and Light Emitting Diode driver , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[2]  Hyunchul Eom,et al.  Design optimization of TRIAC-dimmable AC-DC converter in LED lighting , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[3]  Jong-Shin Ha,et al.  Off-the-line primary-side regulation LED lamp driver with single-stage PFC and TRIAC dimming using LED forward-voltage and duty-variation tracking control , 2012, ISSCC.

[4]  Shu Yuen Ron Hui,et al.  An Analysis and Practical Implementation of a Dimmable Compact Fluorescent Lamp Ballast Circuit Without Integrated Circuit Control , 2006 .

[5]  C·塞纳.  Dimming circuit for LED lighting device and means for holding TRIAC in conduction , 2005 .

[6]  Jong-Shin Ha,et al.  Off-the-Line Primary Side Regulation LED Lamp Driver With Single-Stage PFC and TRIAC Dimming Using LED Forward Voltage and Duty Variation Tracking Control , 2012, IEEE Journal of Solid-State Circuits.

[7]  B. Lehman,et al.  Issues, Models and Solutions for Triac Modulated Phase Dimming of LED Lamps , 2007, 2007 IEEE Power Electronics Specialists Conference.

[8]  Yu-Kai Chen,et al.  Design and implementation of dimmable fluorescent lamps with TRIAC phase control , 2009, 2009 IEEE International Conference on Industrial Technology.

[9]  Zhaoming Qian,et al.  A primary side feedforward control scheme for low power LED driver compatible with Triac dimmer , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[10]  Liang Yan,et al.  A new TRIAC dimmable LED driver control method achieves high-PF and quality-of-light , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).