A High-Power-Factor Dimmable LED Driver with Integrated Boost Converter and Half-Bridge-Topology Converter
Abstract
:1. Introduction
2. Proposed Circuit Configuration and Operation Analysis
2.1. Circuit Topology
2.2. Operation Analysis
- Ignoring the conduction voltage drop for all switching devices, such as diodes and active switches.
- The switching frequency is much greater than the input-line frequency.
- Ignoring voltage ripples on all capacitors because the Cbus and Cb1 are large enough.
- The output inductor Lo is large enough, and its current is assumed to be a constant ILo.
3. Circuit Parameter Design
4. Illustrative Example and Experimental Results
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Input voltage Vin | 110 +/− 10% Vrms, 60 Hz |
Rated output current Io | 1.2 A |
Rated output voltage Vo | 96 V |
Rated output power Po | 115 W |
Switching frequency fs | 50 kHz |
Full-load duty cycle D | 0.45 |
DC-link Voltage VCbus at full load | 310 V |
Transformer turn-ratio n | Np:Ns = 1.4:1 |
Block capacitor Cb1 | 0.1 μF |
PFC inductor LPFC | 0.340 mH |
Input filter inductor Lf | 2.2 mH |
Input filter capacitor Cf | 0.47 μF |
Output filter inductor Lo | 2.2 mH |
Output filter capacitor Co | 470 μF |
DC-link capacitor Cbus | 100 μF |
MOSFET S1, S2 | TOSHIBA 2SK2611 |
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Cheng, H.-L.; Chang, Y.-N.; Hwang, L.-C.; Yen, H.-C.; Chan, S.-Y.; Yang, W.-F. A High-Power-Factor Dimmable LED Driver with Integrated Boost Converter and Half-Bridge-Topology Converter. Appl. Sci. 2020, 10, 2775. https://doi.org/10.3390/app10082775
Cheng H-L, Chang Y-N, Hwang L-C, Yen H-C, Chan S-Y, Yang W-F. A High-Power-Factor Dimmable LED Driver with Integrated Boost Converter and Half-Bridge-Topology Converter. Applied Sciences. 2020; 10(8):2775. https://doi.org/10.3390/app10082775
Chicago/Turabian StyleCheng, Hung-Liang, Yong-Nong Chang, Lain-Chyr Hwang, Hau-Chen Yen, Shun-Yu Chan, and Wen-Fu Yang. 2020. "A High-Power-Factor Dimmable LED Driver with Integrated Boost Converter and Half-Bridge-Topology Converter" Applied Sciences 10, no. 8: 2775. https://doi.org/10.3390/app10082775