Title :
Single-Stage Electrolytic-Capacitors-Free AC-to-DC LED Driving Circuit with High-Power-Factor
Author :
Li, Yan-Cun ; Chen, Chern-Lin
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This paper proposes a single-stage electrolytic-capacitors-free ac-to-dc driving circuit for light-emitting-diode (LED). A buck-boost power factor corrector (PFC) is integrated with a flyback converter. In this way, the presented circuit can provide not only high power factor (HPF) and low total harmonic distortion (THD). The electrolytic capacitors can be replaced by multi-layer ceramic capacitors (MLCCs) via the conversion circuit integration. Above 0.97 power factor (PF) and 82% efficiency are obtained from a 5W LED bulb driver prototype.
Keywords :
AC-DC power convertors; ceramic capacitors; driver circuits; harmonic distortion; light emitting diodes; power factor correction; LED bulb driver prototype; buck-boost power factor corrector; efficiency 82 percent; electrolytic-capacitors-free AC-to-DC LED driving circuit high-power-factor; flyback converter; light-emitting-diode; multilayer ceramic capacitors; power 5 W; single-stage AC-to-DC LED driving circuit; total harmonic distortion; Capacitance; Capacitors; Equations; Inductance; Light emitting diodes; Lighting; Reactive power;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6307738
