| Title |
Electronic Ballast Design Driven by Low Frequency Square Wave for High Power MHL |
| Authors |
Ki-Nam Kim ; Jong-Yun Park ; Young-Min Choi |
| DOI |
10.6113/TKPE/2010.15.5.394 |
| Keywords |
Full-Bridge Inverter; Buck Converter; MH Lamp; Passive PFC |
| Abstract |
In this paper, We proposed electronic ballast that applys Buck Converter operation principle to Full-Bridge inverter. The proposed ballast consists of an EMI Filter, a full-bridge rectifier, a passive power factor correction (PFC) circuit and a full-bridge inverter. The passive PFC is used and a Full-Bridge inverter operation by two frequency. High Side and Low Side switch was driven by high frequency and low frequency and realized buck Converter's operation. The lamp is driven by Low Frequency square wave to avoid Acoustic Resonance. Also, bulk of inductor is reduced by high frequency switching. Performance of the proposed ballast was validated through computer simulation using Pspice, experimentation and by applying it to an electronic ballast for a prototype 700W MHL. |