主動式電流感測電路之磁滯電流控制降壓/降升壓轉換器

Hysteresis-Current-Controlled Buck/ Buck-Boost Converter Using Active Current Sensing Circuit

陳志強(Chih-Chiang Chen)

指導教授 ： 陳建中

國立臺北科技大學/機電學院/電腦與通訊研究所/碩士(2006年)

摘要

本文提出一個新的主動式電流感測器電路，這項技術可以應用於可攜式之磁滯電流控制降壓/降升壓轉換器兩種模式上。
在此次提出的直流對直流轉換器中，包含了主要的架構有功率電晶體、電壓對電流轉換電路、磁滯電流比較電路、驅動電路、避免擊穿保護電路、電流感測電路。電流感測器可以全時間感測電感電流和控制降壓/降升壓轉換器，且磁滯電流感測器在並接時工作正常。此晶片是以台灣積體電路公司零點三五微米兩層多晶矽四層金屬互補式金屬氧化物半導體製程來實現。在降壓/降升壓轉換器正常工作範圍內所實測結果:最大電感電流750mA；輸入電壓範圍3~6V；輸出電壓範圍0.45V~(VDD-0.4)V；最大效率可達到93.6%。

關鍵字

磁滯電流控制 ； 直流對直流轉換器 ； 電流感測

並列摘要

In this thesis, We design a new active current sensing circuit and apply this technology fo hysteresis-current-controlled buck/buck-boost converter using active current sensing circuit for portable applications.
In the proposed DC-DC converter, the key building blocks includes power MOS, Voltage-current conversion circuit, hysteresis-current comparator, driving circuit, non-overlapping circuit and current sensing circuit. The current sensing circuit can fully sense the inductor current and be used to construct buck/buck-boost converter. The hysteresis-current-controlled can be worked in parallel. The proposed circuits have been designed with TSMC 0.35um DPQM CMOS processes. The experimental results show that the buck/ buck-boost converter works well with the following features: the maximum inductor current up to 750mA; the input voltage range is 3~6V; the output voltage range from 0.45 to input voltage-0.4V; the maximum power efficiency up to 93.6%.

並列關鍵字

hysteresis-current controlled ； dc-dc converter ； current sensing

參考文獻

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