LED驅動之動態電流控制以改善功率因數交流直流轉換器

Abstract

在照明材質的選擇上，LED因其具有節能的特性在近年來廣泛的被採用，逐漸取代傳統的省電燈泡與白熾燈等材質。而在LED電路驅動方面，則因實際需求的考量而有不同的解決方案。本論文即在探討應用於LED驅動電路之改善功率因數之架構。內容章節以電路區塊作為分類，分析電路動作原理及實際應用時的設計考量重點，使用H-spice的模擬結果來驗證此電路架構的可行性。結果證實此架構能有效改善LED驅動電路的單位功率因數

In the choice of lighting material，because of the LED have energy-saving features，it have been adopted extensively in recent years，gradually replacing the material of traditional compact fluorescent light and incandescent. Due to the actual needs of the consideration，the LED circuit driving methods have different solutions. This paper is to discuss how to improve the power factor of the structure of the LED drive circuit. The content chapter takes the classification by the circuit block. Analyze the principle of the circuit，and the design consideration of the practical application. Use H-spice simulation results to verify the feasibility of this circuit architecture. The results confirmed that this structure can effectively improve the unity power factor of the LED driver circuit.