一般高頻控制受限於數位晶片處理速度問題，多半是採用數個切換週期觸發一次中斷事件，責任週期為數個週期更新一次。在功率因數修正器的應用中，責任週期實際上是隨著輸入交流電壓時變，導致較大的諧波失真。因此本文提出新的控制法，在觸發一次中斷事件下，透過電流預測法計算出下一態的責任週期，讓責任週期在高頻操作可以即時更新，使電感電流能更追隨參考電流，改善系統的功率因數與總諧波失真。此外，本文提出分時多相技術，藉由開關相移方式，使功率級電感電流的切換頻率倍頻於開關的切換頻率，來完成高頻的操作。
本文最終研製出操作頻率300 kHz，輸入交流電壓110 V，輸出電壓380 V，額定輸出功率500 W之分時多相升壓型功率因數修正器，經實測驗證與傳統控制法比較，其功率因數與總諧波失真皆達到改善的效果。

Generally, high-frequency control is limited by the processing time of digital controller. The duty cycle isn’t updated every switching cycle because an interrupt event is triggered by several switching cycles. In the application of power factor correction, the duty cycle is actually time-varying with the AC input voltage, resulting in larger harmonic distortion. Therefore, a new control method is proposed by this paper. The next duty cycle can be calculated by the current prediction method in an interrupt event. The duty cycle is updated cycle by cycle at high frequency, so that the inductor current can follow the reference current more and improve the power factor and total harmonic distortion of the system. In addition, time-division multi-phase technique is also proposed by this paper, which uses the phase shift method. The switching frequency of the inductor current is several times than the switching frequency of the power switch to complete the high frequency operation.
Time-division multi-phase boost power factor correction with an operating frequency of 300 kHz, an input AC voltage of 110 V, an output voltage of 380 V, and a rated output power of 500 W is developed in this paper. Compared with the traditional control method, the power factor and total harmonic distortion are improved.

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