使用週期跳越及彈性能量分配順序智慧型脈衝寬度控制器之極大輸出範圍單電感五輸出降壓型電源轉換器

近年來可攜式電子產品快速發展，單一電子產品整合了各種功能已經變成一種趨勢，因此電源管理單元必須要能供應各功能區塊所需要的電壓與電流。單電感多輸出的直流對直流電源轉換器能滿足現今對於多電壓的需求，又能大幅度的降低系統的成本與體積。為了提高單電感多輸出電源轉換器在產品上的使用彈性，其轉換器需具有大範圍的輸出能力是必要的。然而各輸出之間不同的負載電流要求以及多組電壓的輸出狀態會導致交互穩壓問題，更甚而之限制了轉換器的電流輸出範圍。本論文以能量分配控制來實現轉換器大範圍輸出電流的能力，並提出了可彈性決定順序的控制器架構來解決操作在不同負載情況下的問題，並減輕不同輸出通道間的交互穩壓影響。此論文提出之電路架構實現於單電感五輸出的降壓型電源轉換器，以TSMC0.18μm的CMOS製程製作。輸入電壓為2.7V~3.63V，輸出電壓分別為2.0V、1.8V、1.6V、1.4V以及1.2V，且各輸出的負載電流範圍為1mA~850mA，最大轉換效率可達85.09%(當Io1=Io2=Io3=Io4=Io5=40mA)。模擬結果顯示當Vo1輸出有50mA至850mA的負載變動時，其他通道因相互穩壓引起的電壓變動能限制在21.66mV內。

關鍵字

單電感多輸出；降壓型電源轉換器；切換電感式電源轉換器；直流-直流轉換器；電流模式；能量分配

並列摘要

In recent years, the rapid development of portable electronic products integrating a variety function blocks into a signle product has become a trend. The power management unit must be able to supply the voltage and current of each functional blocks needed. Single-inductor multiple-output DC-DC switching converter not only meet today's demand for multi-voltage but also greatly reduce the system cost and size. In order to improve the single-inductor multiple-output switching converter on the use of flexible product, which needs to have a wide load range of the converter output capabilities is necessary. However, different requirements of the load current and voltages between different output channels can cause cross-regulation problems and limit the converter output range. In this paper, the converter adopts power distribution control to achieve wide load range of output current capabilities. The proposed controller architecture with flexible order to solve operational problems cause by different load conditions and reduce the effects of cross-regulation between different output channels . The proposed single-inductor five output buck converter fabricated with TSMC 0.18μm CMOS process. The input voltage is 2.7V~3.63V and the output voltages are 2.0V, 1.8V, 1.6V, 1.4V and 1.2V, and the load current range for each output is 1mA ~ 850mA, the maximum conversion efficiency of converter reaches 85.09% (at Io1=Io2=Io3=Io4=Io5=40mA). Simulation results show that when Vo1 has load transient from 50mA to 850mA, the voltage variation caused by cross-regulation of Vo2~Vo5 is less then 21.66mV.

並列關鍵字

Single-inductor multiple-output (SIMO) ； Buck converter ； Switching converter ； DC-DC converter ； Current mode ； Power-distributive

參考文獻

[1] Y.-H. Lu and G. De Micheli, “Comparing system level power management policies,” IEEE Des. Test Comput., vol. 18, pp. 53–60, Mar. 2001.

[2] J.-M. Chang and M. Pedram, “Energy minimization using multiple supply voltages,” IEEE Trans. VLSI Syst., vol. 5, pp. 436–443, Dec.1997.

[3] T. Ishihara and K. Asada, “A system level memory power optimization technique using multiple supply and threshold voltages,” in Proc. Asian and South Pacific Design Automation Conf., Jan. 2001, pp. 456–461.

[4] Y.-J. Yeh, S. Y. Kuo, and J. Y. Jou, “Converter-free multiple-voltage scaling techniques for low-power CMOS digital design,” IEEE Trans. Computer-Aided Design, vol. 20, pp. 172–176, Jan. 2001.

[5] K. Usami, M. Igarashi, F. Minami, T. Ishikawa,M. Kanazawa,M. Ichida, and K. Nogami, “Automated low-power technique exploiting multiple supply voltages applied to a media processor,” IEEE J. Solid-State Circuits, vol. 33, pp. 463–472, Mar. 1998.

國際替代計量

使用週期跳越及彈性能量分配順序智慧型脈衝寬度控制器之極大輸出範圍單電感五輸出降壓型電源轉換器

未授權

主題瀏覽