單一電感三輸出直流-直流升壓轉換器與雙輸出二階型降壓式直流-直流轉換器

Single-Inductor Tri-Output DC-DC Boost Converter and Dual-Output Quadratic DC-DC Buck Converter

陳世偉(Shih-Wei Chen)

指導教授 ： 陳建中

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2009年)

摘要

本論文包含兩個研究的題目，為單一電感三輸出直流-直流升壓轉換器與雙輸出二階型降壓式轉換器，其單一電感三輸出直流-直流升壓轉換器目的是利用單一電感實現三輸出的升壓轉換器，可減少電感使用的成本並達到多輸出的目的，而雙輸出二階型降壓式轉換器除了也具有雙輸出的功能外，具有較大的轉換比是它的特色，因此可以利用這個特色，使降壓器降壓至更低的電壓，並且在此研究中使用平均電流控制使暫態反應更加快速。
提出的電路皆使用台積電TSMC CMOS 0.35μm 2P4M 製程技術來完成。量測結果方面，其單一電感三輸出直流-直流升壓轉換器供應電壓範圍為2.5V至3.1V，最大負載電流可達300mA，輸出電壓範圍為2.8V至4.4V，其效率高達86.9%，適合應用於可攜式裝置上，或是SOC的系統。雙輸出二階型降壓式轉換器，供應電壓範圍為4.5V~5.5V，輸出電流可達1A，輸出電壓範圍為95mV至1.25V，適合作為低電壓的輸入電源。

關鍵字

單一電感 ； 多輸出 ； 升壓轉換器 ； 降壓轉換器 ； 直流-直流 ； 平均電流模式

並列摘要

There are two kinds of DC-DC converters presented in this study. One is the single-inductor tri-output (SITO) DC-DC boost converter, and the other one is the dual-output quadratic (DOQ) DC-DC buck converter. The proposed SITO DC-DC boost converter not only provides three output sources but also uses single inductor. The proposed DOQ DC-DC buck converter has a wider conversion ratio with ultra-low voltage for dual-output voltage sources. In this study, the methodology for controller design of DOQ DC-DC buck converter is given using average current-mode control.
The proposed circuits have been fabricated with TSMC 0.35mm 2P4M CMOS processes. The experimental results showed that SITO DC-DC boost converter can operate with supply voltage form 2.5V to 3.1V, which is suitable for single-cell lithium-ion battery supply applications. The output ripple voltage is about 40mV with a 220-μF off-chip capacitor and 10-μH off-chip inductor. The output maximum load current is up to 300mA. The output voltage range is from 2.8V to 4.4V. The maximum power efficiency is up to 86.9%.
The experimental results showed that DOQ DC-DC buck converter can operate with supply voltage form 4.5V to 5.5V. The output ripple voltage is about 50mV with a 10-μF off-chip capacitor and 5-μH and 6-μH off-chip inductor. The output maximum load current is up to 1A. The output voltage range is from 95mV to 1.25V.

並列關鍵字

single-inductor multi-output ； multi-output ； boost ； buck ； quadratic ； DC-DC ； converter ； average current-mode ； current sensing ； constant frequency

參考文獻

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