本論文設計一個應用於電源轉換器前級的功率因數校正晶片，採用單週期控制法則，因為僅需回授輸入電流以及輸出電壓做控制，不使用乘法器，具有設計簡單之優點。傳統電源功率因數校正晶片，需使用乘法器將輸入電壓與輸出電壓做一連接，因此功率因數校正效果，容易受到乘法器準確度的影響。在本晶片當中，透過單週期控制的重置積分器的運算，可以準確的控制開關責任週期，減少總諧波失真，並且加入一電壓準位位移電路，使晶片適用於單輸入操作電壓。為了達到更好的效能，前沿遮蔽電路以及過電壓保護，將整合於所提出的晶片中。本晶片使用0.35μm 2P4M 3.3V/5V 混合訊號互補式金氧半製程來製作。

A one-cycle control based trailing-edge boost type power factor correction IC with instant-switch-current control is proposed in this thesis. It can be utilized to control the front stage of power converter. This control IC is easy to use because only two feedback signals are needed. One is input current and another is output voltage. Multiplier is excluded in this chip. In conventional PFC control chip, the input voltage and load demand are related by using a multiplier. The performance of power factor correction is highly dependent on the precision of multiplier. By using the integrator with reset proposed in one cycle control, the duty ratio can be precisely controlled to lower the total harmonic distortion. Moreover, a level shift circuit is adopted to make this chip work with unipolar supply voltage. For the purpose of better performance, the functions such as leading edge blanking (LEB) and over voltage protection (OVP) are also integrated into the proposed chip. This chip is fabricated with 0.35μm 2P4M 3.3V/5V Mixed Signal CMOS Process.

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