Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7891
標題: 寬範圍且高效率脈波頻率調變降壓轉換器
Wide Range and High Efficiency Buck Converter with Pulse Frequency Modulation
作者: 洪溪憲
Hung, Hsi-Hsien
關鍵字: Pulse Frequency Modulation;脈波頻率調變;Buck Converter;降壓式轉換器;高效率脈波頻率調變降壓轉換器
出版社: 電機工程學系所
引用: [1] 簡峯偉, “高效率且廣範圍之雙模式降壓轉換器,” 國立中興大學電機所論文,中華民國九十五年六月。 [2] A. I. Pressman, Switching Power Supply design, New York: McGraw-Hill, 1991. [3] H. W. Whittington, B.W. Flynn, and D. E. Macpherson, Switched Mode Power Supply: Design and Construction 2nd edition, Research Studies Press Ltd., 1997. [4] D. O’ Sullivan, B. Spruyt, and A. Crausaz, “PWM conductance control,” in Proc.IEEE Power Electronics Specialists Conference, 1988, pp. 351-359. [5] L. Dixon, “Average current mode control of switching power supplies,“ in Unitrode Power Supply Design Seminar Handbook (SEM-700), pp. 5-1 to 5-14, Unitrode Corporation, MA, 1990. [6] B. Carsten, “Current mode control for high frequency switch mode,” in Proc. Power Convert and Intelligent Motion (PCIM), Apr. 1986, pp. 61-64. [7] K. Kester and B. Erisman, “Switching Regulators,” Analog Devices Technical Library on Power Management, 1999. [8] P. L. Miribel-Catala, M. Puig-Vidal, J. S. Marti, P. Goyhenetche, and X. Q. Nguyen, “An integrated digital PFM dc-dc boost converter for a power management application: a RGB backlight LED system driver,” in Proc. IEEE Annual Conference on Industrial Electronics, Nov. 2002, vol. 1, pp. 37-42. [9] C. Y. Leung, P, K. T. Mok, and K. N. Leung, “A 1.2V buck converter with a novel on-chip low-voltage current-sensing scheme,” in Proc. International Symposium on Circuit and System, May 2004, vol. 5, pp. V-824-827. [10] C. Yoo, “A CMOS buffer without short-circuit power consumption,” IEEE Transactions on Circuits and Systems II, vol.47, pp.935-937, Sept. 2000. [11] D. Ma, W.-H. Ki, C. -Y. Tsui , and P.K.T Mok, “Single-Inductor multiple-output switching convert with time-multiplexing control in discontinuous conduction mode,” IEEE Journal of Solid-State Circuit, vol. 38, no. 1, pp. 542-547, Jan. 2003. [12] S. Zhou and G. A. Rincón-Mora, “A high efficiency, soft-switching DC–DC converter with adaptive current-ripple control for portable applications,” IEEE Transactions on Circuits and Systems II, vol. 53, no. 4, Apr. 2006.
摘要: 
在傳統電源轉換器設計上,大多採用雙模式控制(PWM/PFM)來實現寬範圍負載電流電源轉換器。但在PWM電源轉換器上,因為電路特性的關係,必須額外設計補償電路。然而在積體電路上,電容值不易精確設計,因此有時也需在電路外,加入電容元件。所以在本論文中,設計一個具有提供寬範圍負載電流且高效率的PFM降壓電源轉換器,僅用單一控制模式來取代雙模式的做法,以減少設計上困難和不必要的外部元件。
本論文提出控制電感電流的方式,減少功率晶體功率消耗和電感電流過充。當電感電流足夠供應負載時,電感電流控制器產生相對應控制電壓,藉此控制電壓送到關閉時間產生器,產生提早關閉功率晶體導通時間訊號。
論文中使用的是TSMC 1P6M 0.18μm的製程完成電路設計,且提供輸出電壓範圍是0.3V~1.8V,負載輸出電流範圍為5mA~1A。在功率效率上,負載電流100mA時為最高效率 91%。晶片面積大約為3.3x1.5mm²。

In traditional power converters design, PFM and PWM dual control mode is frequently used for wide range loading current applications. For PWM control mode, extra circuits must be utilized for compensation. In addition, it is not easy to get exact capacitance in integrated circuits design and thus the circuits may need to add extra capacitors outside the chip. This thesis presents a wide range loading current and high efficient buck converter design with PFM, which uses single control instead of dual control mode to reduce design difficulty and outside devices.
This thesis proposed the control of inductor current to reduce power consumption of the power MOS transistors and to avoid overloading of inductor current. When the inductor current is sufficient to supply the loading current, the inductor current controller will generate a corresponding control voltage to the off-time generator, which can turn off the power MOS transistors.
This buck converter is designed by using TSMC 1P6M 0.18μm technology. The output voltage range is 0.3V~1.8V and the output current is 5mA~1A. The power efficiency of the converter is 91% at 100mA loading current. The size of the chip is 3.3x1.5mm².
URI: http://hdl.handle.net/11455/7891
其他識別: U0005-0702200902205300
Appears in Collections:電機工程學系所

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