A universal-input high-power-factor LLC resonant driver without electrolytic capacitor for PWM dimming LED lighting application

YANG, Jianbo, AL-NAEMI, Faris, ZHANG, Weiping, LIU, Yuanchao and CHEN, Xiaoping (2015). A universal-input high-power-factor LLC resonant driver without electrolytic capacitor for PWM dimming LED lighting application. In: 2014 International Power Electronics and Application Conference and Exposition. IEEE, 1473-1478.

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Abstract

This paper presents a two-stage PFC LED driver. The two outstanding features of the proposed driver are: 1 the entire system has no electrolytic capacitor, which prolongs the lifetime of the LED driver; 2 LED string current is controlled directly and PWM diming also provided. This makes the driver is virtually a current source driver. The front end stage is the conventional Boost AC/DC converter which provides a PFC (power function correction) function and operates on the Critical Conduction Mode (CRM). The cascaded DC/DC converter is a LLC resonant converter. The operations and the choice of the capacitors are studied in this paper. Experimental results are presented to verify the theoretical predictions.

Item Type:	Book Section
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Materials and Engineering Research Institute > Modelling Research Centre > Microsystems and Machine Vision Laboratory
Identification Number:	https://doi.org/10.1109/PEAC.2014.7038082
Page Range:	1473-1478
Depositing User:	Margaret Boot
Date Deposited:	08 Nov 2016 09:20
Last Modified:	18 Mar 2021 22:30
URI:	https://shura.shu.ac.uk/id/eprint/13224

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