傳統上應用於高升壓獵能系統之轉換器為升壓轉換器，由於架構的限制，必須將升壓轉換器操作在不連續導通模式，因此會造成較大的導通損失以及開關需要承受較大的電流應力。本論文提出一應用於獵能系統之升壓型返馳式轉換器控制晶片，藉由升壓轉換器與返馳式轉換器的疊接可以大幅度提高電壓轉換比。此外，此架構可以將耦合電感所產生之漏感能量回收至負載，因此可以提升效率以及減少開關上的應力。本篇所提出之控制利用電壓回授控制來調控輸出電壓達到穩壓的效果。最後，本控制晶片使用TSMC 0.25 μm CMOS 高壓製程實現並將其應用於一輸入電壓0.2-0.3 V，輸出電壓5 V，輸出功率為20 mW的升壓型返馳式電源轉換器以驗證此控制晶片的特性。

Conventionally, boost converter is used for high step-up energy harvesting system, but it is needed to be operated in discontinuous conduction mode (DCM) because of the limitation of the topology. Therefore, it causes more conduction loss and current stress on the switch. In this thesis, the control IC for boost-flyback converter in energy harvesting applications is proposed. It can greatly increase the voltage conversion ratio with the cascode of boost converter and flyback converter. In addition, this topology can recycle the energy of the leakage inductance produced from coupled inductor to load. Thus, the efficiency can be increased and the stress on the main switch can be reduced. Finally, this controller is fabricated with TSMC 0.25 μm CMOS high voltage mixed signal general purpose process. The boost-flyback converter with input voltage of 0.2-0.3 V, output voltage of 5 V and output power of 20 mW is implemented to verify the feasibility of the proposed controller.

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