單電感雙輸出升降壓式直流對直流轉換器並操作於擬似連續導通模之設計與完成

Design and Implementation of an SIDO Buck-Boost DC-DC Converter Operating in PCCM

楊勝宏(Sheng-Hong Yang)

指導教授 ： 吳紹懋

元智大學/電機通訊學院/電機工程學系/碩士(2011年)

摘要

本論文提出一單電感雙輸出交換式直流對直流轉換器之設計與實現，其中包含升壓器、降壓器及回授控制電路。本系統操作於擬似連續導通操作模式，針對二個輸出端之輸出電壓與負載電流調節四個責任週期，分別控制電感充電、降壓放電、昇壓放電及自走時間，以動態調整電感電流準位，達到穩壓及高效率的目的。控制電路結合電感電流感測與雙壓迴路，分別補償昇壓器與降壓器兩個迴路之相位與增益，以降低負載變異、輸入電壓變異與雙輸出電壓交互響應對系統之影響。
本論文主要針對此系統作分析與設計並實現電路。此直流對直流轉換器以TSMC 0.35-um 2P4M CMOS製成實現，晶片大小為 1.18x1.16mm2。 根據量測的結果，最大輸出漣波電壓在40毫伏以下，而輸出電流範圍在50mA到500mA之間。輸入電壓範圍在2V到2.4V之間，且輸出電壓分別為1.2V 與2.4V，直流對直流轉換器之操作頻率為350千赫茲。

關鍵字

單電感雙輸出 ； 擬似連續倒通模式

並列摘要

The design and implementation of a Signal-Inductor-Double-Output(SIDO) switching buck-boost DC-DC converter is presented. The system operates in pseudo-continuous conduction mode(PCCM). By adaptively controlling the duty intervals for inductor charging, buck conversion, boost conversion, and freewheeling respectively, the system manages the dynamic inductor current level to achieve stable output voltages and high efficiency.
The DC-DC converter was implemented in TSMC 0.35-μm 2P4M CMOS process with die size of 1.18×1.16 mm2. According to measurement results, the maximum peak-to peak output voltage ripple less than 90mV and current ranges between 50mA and 500mA. The DC-DC converter operates in frequency 350kHz and supply voltage ranges from 2 to 2.4V. The output voltage is 1.2V and 2.4V.

並列關鍵字

SIDO ； PCCM

參考文獻

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