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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yong-Nong Chang Hung-Liang Cheng Chun-An Cheng Chien-Hsuan Chang Yu-Hung Lin |
| Copyright Year | 2015 |
| Description | Author affiliation: Dept. of Electr. Eng., Nat. Formosa Univ., Huwei, Taiwan (Yong-Nong Chang) || Dept. of Electr. Eng., I-Shou Univ. Kaohsiung, Kaohsiung, Taiwan (Hung-Liang Cheng; Chun-An Cheng; Chien-Hsuan Chang; Yu-Hung Lin) |
| Abstract | A novel dimmable LED driver is presented in this paper. The circuit topology uses two active switches. One active switch shared by a buck-boost converter and a buck converter is operated at a high-switching frequency while the other one is low-frequency pulse-width modulated to dim high power light-emitting diodes (LED). The buck-boost converter plays the role of a power-factor corrector (PFC). It operates at discontinuous-conduction mode (DCM) to waveshape the line current to be sinusoidal and in phase with the input-line voltage. The buck converter regulates the dc-link voltage to output a low-frequency PWM voltage to drive high-brightness LEDs. Since only one power-conversion process is required, and the buck converter works only when the low-frequency PWM voltage is at a high level, the proposed LED driver has the advantage of high efficiency. Besides, it achieves a unity power factor and a low total current harmonic distortion (THDi). |
| Starting Page | 914 |
| Ending Page | 919 |
| File Size | 427941 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781479978007 |
| DOI | 10.1109/ICIT.2015.7125214 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-03-17 |
| Publisher Place | Spain |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Light emitting diodes Inductors Reactive power Voltage control Capacitors Pulse width modulation Lighting power-factor corrector (PFC) LED driver pulse-width modulation |
| Content Type | Text |
| Resource Type | Article |
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