本論文提出一應用於太陽能獵能技術之單電感升降壓型轉換器為感測器提供電源，利用CMOS太陽能電池收集能量後，經電源管理單元供給穩定電源至感測器。為了解決獵能環境下因太陽能光源變動而造成輸出不穩定，甚至是無法使用的情況，因此在本論文提出了模式切換的架構，不僅可以根據不同環境切換成不同的模式，也可以將多餘能量儲存至超級電容上，在太陽能電池能量不足時可以藉由超級電容對輸出進行供電，以維持輸出的穩定度。
應用於光獵能系統之單電感升降壓轉換器使用TSMC 0.18-μm CMOS標準製程實現，其輸出負載電流範圍坐落於0.001~1mA，量測結果顯示在負載電流為1mA時，達到最高能量轉換效率90.8%，具備最大功率追蹤功能可在不同光源下追縱最大功率電點電壓，且可以根據獵能環境的條件自動切換模式，所測得最高追蹤效率為98.8%，在太陽能電池完全沒有功率輸入時，也能維持輸出的穩定度。

In this thesis, a buck-boost converter applied to a solar energy harvesting system is introduced to supply power to IoT sensor node. To continuously supply power to the load at all the times, this work proposes a mode switching architecture which not only switches to different modes according to different environments but also stores the excess energy to the supercapacitor. The energy stored in supercapacitor can be applied to the load whenever the solar cell doesn’t generate enough power.
This interface based on a single-inductor Buck-Boost converter for light-harvesting is designed with a TSMC’s 0.18µm standard CMOS process. The proposed converter is designed to provide 0.001 – 1mA output current to supply enough energy to the load. A maximum power point tracking (MPPT) controller is also designed to harvest the most energy from solar cell. The measurement results have shown a tracking efficiency is 98.8%, peak conversion efficiency of 90.8% at 1mA load current which is among the best compared to the prior arts.

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