Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Design of LED Drive using MLCC Output Capacitor
Authors Man-Seung Han ; 李Sang-Hun Lee ; Su-Eog Cho ; Sung-Jun Park
DOI 10.6113/TKPE/2011.16.5.448
Page pp.448-456
ISSN 1229-2214
Keywords LED(Light Emitting Diode); MLCC(Multi-Layer Ceramic Capacitor); Boost DC/DC converter; Electrolytic condenser
Abstract In this paper, we proposed a LED driver that allows to use a long lifetime MLCC with small voltage capacity to replace the electrolytic condenser that has been used at the output part by storing only the voltage fluctuation due to temperature variation in the output condenser. The proposed LED driver can allow to use a long lifetime MLCC with small power loss as the output condenser instead of the conventional electrolytic condenser with short lifetime because it stores only the voltage fluctuation due to the temperature variation of the LED light source in the output condenser by connecting the output condenser with the input power supply in series in the basic topology of the conventional boost DC/DC converter. In this study, we performed a simulation to verify the conventional DC/DC converter and the proposed DC/DC converter. It was shown that the DC/DC converter proposed through the experiment allows to use MLCC as the output condenser and the efficiency can be improved.