論文第一部份,提出一個使用零電流切換技術的極低壓高轉換比返馳式轉換器。在本段論文中提出使用變壓器和零電流切換技術的返馳式轉換器,藉由變壓器儲能與升壓的特性和零電流切換技術的控制電路,使得微小的輸入電壓能有效率的提升至可用的輸出範圍。電路使用台灣積體電路公司零點一八微米單層多晶矽六層金屬互補式金屬氧化物半導體製程來實現,晶片面積分別為1.19x 1.18 mm2 (含PADs)。 論文第二部份,提出一個使用虛擬電感電流磁滯控制具有快速暫態響應之降壓轉換器。在此設計中使用適應式三角波產生器,使用工作週期訊號可以產生一個與電感電流相似的電壓波形。此架構使用一個運算放大器便能得到全電流感測的功能,此外還擁有設計簡單、低晶片面積、快速暫態響應等優點。電路使用台灣積體電路公司零點一八微米單層多晶矽六層金屬互補式金屬氧化物半導體製程來實現,晶片面積為1.19 x 1.03 mm2 (包含PADs)。
In the first part of this thesis, we present an ultra-low input flyback converter with wide conversion ratio utilizing zero-current switching technique. In this part, the flyback converter which consists of control circuit utilizing zero-current switching technique and transformer is proposed. By using the features of the transformer that are energy storage and voltage transform and collocating with control circuit, the ultra-low input voltage can transfer to available output voltage efficiently. The proposed flyback converter has been fabricated with TSMC 0.18μm CMOS 1P6M process, the total chip area is 1.19 x 1.18 mm2 with PADs. In the second part of this thesis, we present a fast transient response buck converter utilizing pseudo inductor current hysteresis control. Adaptive voltage ramp generator which can generate a voltage signal similar to inductor current is used in the design by utilizing duty cycle signal. This circuit can achieve full cycle current-sensing by using one operational amplifier merely. Others advantages of the proposed converter are simple design, low chip area, and fast transient response. The proposed buck converter has been fabricated with TSMC 0.18μm CMOS 1P6M process, the total chip area is 1.19 x 1.03mm2 with PADs.