This thesis mainly presents a LED driver circuit based on single-stage Flyback converter with power factor correction. Power factor correction technique is applied for constant current driver. Accroding to different magnetize inductance current operating
mode, two methods are used to improve the drawbacks of Flyback converter which is operated in open loop. Discontinuous conduction mode is controlled by single loop which is called voltage follower control. Continuous conduction mode is controlled by dual loop, that applied to nonlinear carrier control(NLC). Multiplier is usually used to traditional power factor correction, but it is expensive. To reduce the system cost, a multiplier is removed from NLC. The designed circuit is verified by SPICE software and experiments. From simulation and experimental results, it shows the proposed system achieves the goal with high power factor and constant output current.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-1015108-111325 |
| Date | 15 October 2008 |
| Creators | Li, Yi-Jie |
| Contributors | Jia-Sing Wong, Far-Wen Jih, Tzuen-Lih Chern, Liang-Chung Wu, Tsai-Chung Yu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1015108-111325 |
| Rights | not_available, Copyright information available at source archive |
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