HBLED driving strategy with reduced storage capacitor based on load modularization

As one of the major advantages of High-brightness LED (HBLED) is their lifetime, electronic equipment used in power conditioning for HBLED should avoid some technologies as electrolytic capacitors that reduce significantly the operation lifetime. In this paper, a new strategy to drive HBLED from the AC mains is explored in order to reduce the required energy storage, while keeping a reduced level of current harmonic injection. It is based on splitting the load in several parts or modules and the phase shifted operation of these modules. As a result, the required energy storage is dramatically reduced, and bulk electrolytic capacitors can be removed. The theoretical principle of operation has been validated through a proof of concept prototype.

[1]  Antonio Lázaro,et al.  New Power Factor Correction AC-DC Converter With Reduced Storage Capacitor Voltage , 2007, IEEE Transactions on Industrial Electronics.

[2]  M. Granger Morgan,et al.  The Transition to Solid-State Lighting , 2009, Proceedings of the IEEE.

[3]  Xinbo Ruan,et al.  Means of Eliminating Electrolytic Capacitor in AC/DC Power Supplies for LED Lightings , 2009, IEEE Transactions on Power Electronics.

[4]  Wei-Hsu Chang,et al.  A Digital boost converter to drive white LEDs , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[5]  S. Buso,et al.  Performance Degradation of High-Brightness Light Emitting Diodes Under DC and Pulsed Bias , 2008, IEEE Transactions on Device and Materials Reliability.

[6]  A.J. Calleja,et al.  Driver for high efficiency LED based on flyback stage with current mode control for emergency lighting system , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[7]  Javier Sebasti.  A Very Simple Control Strategy for Power Factor Correctors Driving High-Brightness LEDs , 2009 .

[8]  Regan Zane,et al.  Digital Architecture for Driving Large LED Arrays with Dynamic Bus Voltage Regulation and Phase Shifted PWM , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[9]  R. Zane,et al.  Reconfigurable and fault tolerant digital phase shifted modulator for luminance control of LED light sources , 2008, 2008 IEEE Power Electronics Specialists Conference.

[10]  D. Weng,et al.  Quasi-Active Power Factor Correction Circuit for HB LED Driver , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[11]  X. Long,et al.  Development of street lighting system-based novel high-brightness LED modules , 2009 .

[12]  Xinbo Ruan,et al.  A Method of Reducing the Peak-to-Average Ratio of LED Current for Electrolytic Capacitor-Less AC–DC Drivers , 2010, IEEE Transactions on Power Electronics.

[13]  C.K. Tse,et al.  On Driving Techniques for LEDs: Toward a Generalized Methodology , 2009, IEEE Transactions on Power Electronics.