Chapter 6 Conclusions and Future Works
6.2 Future Works
The proposed charge-recycling (CR) and buck-store/boost-restore (BSBR) technique can store extra charge on the output capacitor to the recycling capacitor when the output voltage transits from high-supplying voltage for turning on the G- B-LED to low-supplying voltage
for turning on the R-LEDs. As a result, the power dissipation on constant current generator can be considerably improved. In addition, these techniques also can reduce the numbers of output component to improve the PCB area. However, these two techniques still require the external large capacitor and inductor to achieve the performance of fast reference tracking. In order to have future works on the reference tracking, furthermore simplify the driving module and reduce more power consumption of the FCS-LCD backlight module can be continuously studied. The BSBR and CR technique can be based on a synchronous boost DC-DC converter.
In addition, there are many challenges on the studies of reference tracking technique. Such as that the new control algorithm for reducing chip area and power consumption, the fast transient technique for stepping load transition, a new controlling error amplifier or compensator for improving the load\line regulation.
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Published Paper
International Journal Paper： ： ： ：
2010
1. (SCI) Chia-Hsiang Lin, Chun-Yu Hsieh, and Ke-Horng Chen, “A Li-Ion Battery Charger with Smooth Control Circuit (SCC) and Built-in Resistance Compensator (BRC) for Achieving Stable and Fast Charging,” in IEEE Transaction on Circuit and System I, pp. 506-517, Feb., 2010.
2. (SCI) Chao-Hsuan Liu, Chun-Yu Hsieh, Yu-Chiao Hsieh, Ting-Jung Tai, and Ke-Horng Chen, “SAR-controlled Adaptive Off-time Technique without Sensing Resistor for Achieving High Efficiency and Accuracy LED Lighting System,” in IEEE Transaction on Circuit and System I, pp. 1384-1394, June, 2010.
3. (SCI) Chun-Yu Hsieh, Chih-Yu Yang, and Ke-Horng Chen, “A Low-Dropout Regulator with Smooth Peak Current Control (SPCC) Topology for Over-Current Protection,” in IEEE Transaction on Power Electronics, pp. 1386-1394, June, 2010.
4. (SCI) Chun-Yu Hsieh, Hong-wei Huang, and Ke-Horng Chen, “A 1 -V, 16.9 ppm/
°C, 250 nA Switched-Capacitor CMOS Voltage Reference,” in IEEE Transaction on Very Large Scale Integration System, accept to be published.
2009
5. (SCI) Chun Yu Hsieh and Ke Horng Chen, “Boost DC-DC Converter With Fast Reference Tracking (FRT) and Charge-Recycling (CR) Techniques for High-Efficiency and Low-Cost LED Driver”, IEEE Journal of Solid-State Circuits, pp. 2568-2580, Sep., 2009.
6. (SCI) Chun-Yu Hsieh, Chih-Yu Yang, and Ke-Horng Chen, “A Charge-Recycling Buck-store and Boost-Restore (BSBR) Technique with Dual Outputs for RGB LED Backlight and Flashlight Module,” in IEEE Transaction on Power Electronics, pp.
1914-1925, Aug., 2009.
2008
7. (SCI) Chun-Yu Hsieh and Ke-Horng Chen, “Adaptive Pole-Zero Position (APZP) Technique of Regulated Power Supply for Improving SNR,” in IEEE Transaction on Power Electronics, pp. 2949-2963, Nov. 2008.
International Conference Paper： ： ： ：
2010
1. Chen-Li Chu, Chun-Yu Hsieh, Da-Liang Chiu, and Ke-Horng Chen,
“Multi-LC/BL Algorithmic Technique in Field Color Sequential LCD for Color Breakup Suppression,” Society for Information Display, 2010 Digest 12.3, pp 159-162.
2. Chun-Yu Hsieh, Chih-Yu Yang, Fu-Kuei Feng, and Ke-Horng Chen, “A Photovoltaic System with an Analog Maximum Power Point Tracking Technique for 97.3% High Effectiveness,” Society for Information Display, 2009 Digest 43.2, pp640-643.
2009
3. Chun-Yu Hsieh, Chih-Yu Yang, Ming-Hsin Huang, Don-Hwan Li, Chi-Lin Chen, and Ke-Horng Chen, “A Charge-Reservoir with Buck-Store and Boost-Restore (BSBR) Technique for High Efficient Conversion and Low Cost Solution of RGB LED Display Panels,” Society for Information Display, 2009 Digest 43.2, pp640-643.
2008
4. Chun-Yu Hsieh and Ke-Horng Chen, “Boost DC-DC Converter with Charge-Recycling (CR) and Fast Reference Tracking (FRT) Techniques for High-Efficiency and Low-cost LED Driver,” IEEE European Solid-State Circuits Conference, 2008, pp.358-361.
5. Chun-Yu Hsieh, Shih-Jung Wang, Yu-Huei Lee and Ke-Horng Chen, “High Efficiency and/or Low Cost LED Backlight System for Color Sequential Technique in Color Filter-less LCD System,” Society for Information Display, 2008 Digest 71.4, pp1104-1107.
6. Chun-Yu Hsieh, Shih-Jung Wang, Yu-Huei Lee, and Ke-Horng Chen, “High Efficiency and/or Low Cost LED Backlight System for Color Sequential Technique in Color Filter-less LCD System” Society for Information Display , Los Angel, May 18-23 2008
7. Chun-Yu Hsieh, Shih-Jung Wang, Yu-Huei Lee, and Ke-Horng Chen, “LED Drivers with PPD Compensation for Achieving Fast Transient Response”
International Symposium on Circuits and Systems, Seattle, May 18-21 2008 8. Hong-wei Huang, Chun-Yu Hsieh, Ke-Horng Chen, and Sy-Yen Kuo, ” A 1-V,
16.9 ppm/°C, 250 nA Switched- Capacitor CMOS Voltage Reference”,
International Solid State Circuit Conference, San Francisco, USA, Feb. 3-7 2008
2007
9. Chun-Yu Hsieh, Yung-Chun Chuang, and Ke-Horng Chen,” A Novel Precise Step-Shaped Soft-Start Technique for Integrated DC-DC Converter” International Conference on Electronics, Circuits, and Systems, Dec. 11-14 2007, Morocco Marrakech
10. Chun-Yu Hsieh, Po-Chin Fan, and Ke-Horng Chen, “A Dual Phase Charge Pump with Compact Size” International Conference on Electronics, Circuits, and Systems, Dec. 11-14 2007, Morocco Marrakech
11. Hong-wei Huang, Chun-Yu Hsieh, Ke-Horng Chen, and Sy-Yen Kuo, “Adaptive Frequency Control Technique for Enhancing Transient Performance of DC-DC converters”, IEEE European Solid-State Circuit Conference, Munich, Germany, Sep. 11-13 2007
12. Hong-wei Huang, Chun-Yu Hsieh, Ke-Horng Chen, “Load Dependent
Dead-Times Controller Based on Minimized Duty Cycle Technique for DC-DC Buck Converters”, IEEE Power Electronics Specialist Conference, Orlando, Florida, USA, June 17-21 2007
13. Shih-Min Chen, Chun-Yu Hsieh, Ke-Horng Chen, “Challenge on Compact Size DC-DC Buck Converters with High-Speed Current Sensor and On-Chip Inductors”, IEEE Midwest Symposium on Circuits and Systems, Montréal, Canada, Aug. 5-8 2007
National Conference Paper： ： ： ：
1. (SCI) Chun-Yu Hsieh, Chih-Yu Yang, and Ke-Horng Chen, “An Energy-Recycling Buck-Store and Boost-Restore (BSBR) Technique with Dual Outputs for RGB LED Backlight and Flashlight Module,” in Electronic Technology Symposium, June, 2009.
2. (SCI) Chun-Yu Hsieh, Chih-Yu Yang, and Ke-Horng Chen, “A Low-Dropout Regulator with Smooth Peak Current Control (SPCC) Topology for Over-Current Protection,” in VLSI/CAD, July, 2009.
Vita
Chun-Yu Hsieh was born in Taichung, Taiwan. He received the B.S. degree in Electrical and Control Engineering from Nation Chiao Tung University, Taiwan, in 2004, and is currently pursuing the Ph. D.
degree in Electrical and Control Engineering, National Chiao Tung University, Hsinchu, Taiwan. His research area contains many projects of LED driver ICs and power management ICs at Low Power Mixed Signal Lab now. His interests include power management circuit designs, LED driver ICs, and analog integrated circuit designs.