高頻同步升降壓直流轉直流電源轉換器

HIGH FREQUENCY SYNCHRONOUS BUCK BOOST DC-DC CONVERTER

曹浚豪(Jiun-Hau Tsao)

指導教授 ： 黃淑絹

大同大學/電機資訊學院/電機工程學系所/碩士(2012年)

摘要

本篇論文使用了非反相型態的架構來實現升降壓的電源轉換以延長手持式設備的電池使用時間，升降壓轉換器中以四顆功率電晶體做同步切換以有效提升轉換效率，操作頻率提升至1MHZ以減少外部電感的體積。補償部份將傳統TYPE III分為增益與相位兩部份串聯而成，可避免掉用大的電容值產生低頻的零點而有利於電路的積體化。
模擬結果顯示升降壓轉換器可以操作在1MHz的頻率，輸入電壓為4.7V至2.8V，適合於鋰電池的應用。輸出電壓穩定在3.3V並且使用10uF及3.3mH的外部電感及電容，在負載電流為50mA至400mA的範圍內，整體轉換效率約為90%以上 ，靜態功率消耗為3mW。本篇論文使用由國家晶片中心提供的TSMC 0.35um CMOS 2P4M製程參數。

關鍵字

脈寬調變 ； 電源管理 ； 升降壓

並列摘要

In this thesis, we propose a non-inverting topology for buck-boost converter to extend the battery life of a portable device. Four power MOSFETS switches are used to improve the efficiency, and increase the operation frequency to 1MHz to minimize the inductance. The compensated error amplifier is composed of two blocks, unity-gain zero generation block and gain block, realizing phase shift and gain of the feedback loop, respectively. Therefore, it can reduce the capacitor value for circuit integration.
The simulation results show that this buck-boost converter can operate in 1MHz with supply voltage from 4.7V to 2.8V, which is suitable for single-cell lithium-ion battery supply applications. The output voltage regulated in 3.3V with a 10uF off-chip capacitor and 3.3uH off-chip inductor. The power efficiency is over 90% for load current from 50mA to 400mA. The quiescent power dissipation is 3mW.
The DC-DC converter has been fabricated with a TSMC 0.35um 2p4m 3.3V/5V Mixed Signal CMOS process provided by National Chip Implementation Center(CIC).

並列關鍵字

voltage mode ； dc-dc converter ； buck-boost

參考文獻

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