Research on the Low-ripple LED Driver Based on Single-stage Full-bridge Converter
SU Jinwen
LIN Guoqing
Abstract：A low-ripple LED driver circuit topology based on single-stage full-bridge PFC and its control strategy is proposed. Using clamp circuit to suppress the bus voltage spike of the full-bridge PFC circuit, and combining the clamp circuit and the flyback converter to constitute a ripple suppression circuit,by controlling the output current of the flyback converter to make it phase opposite and amplitudes similar to the main circuit current,the ripple currents cancel each other out,and the low frequency current ripple at the output side is suppressed. The circuit composition,working principle and low frequency ripple suppression mechanism of this circuit are analyzed in detail. The simulation results verify the feasibility of the theoretical design.
Keywords：single-stage full-bridge converterpower factor correctionlow-frequency current ripple suppression
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 25-28 )