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    題名: Design and implementation of power IC for LED lighting
    其他題名: LED照明的電源IC設計和實現
    作者: 黃朝忠;Huang, Chao-Chung
    貢獻者: 淡江大學電機工程學系博士班
    李揚漢;Lee, Yang-Han
    關鍵詞: LED照明;LED lighting
    日期: 2013
    上傳時間: 2014-01-23 14:44:58 (UTC+8)
    摘要: 在重視環保及節省能源的時代,現在各國開始廣泛使用LED 燈具, 像LED燈泡,LED 燈管和LED路燈都是使用白光LED當作光源,由於各國使用的輸入電壓皆不相同,因此在製作時需要能夠廣泛應用於各種電壓的白光 LED驅動器就極為重要。
    具有線電壓補償的白光LED驅動電路的設計和實現,當輸入電壓為110Vac 或220Vac經過整流後的電源時,LED驅動電路可以直接降壓為7V提供給內部控制電路使用,利用外部的電阻偵測LED的電流,使LED 電流可以穩定在395mA,由於電壓需要可以使用在110Vac或220Vac,設計一個針對輸入電壓變異的補償電路,使LED驅動電路在輸入電壓變異大時也能提供LED流過穩定的電流,減少LED平均電流的變異。
    In an age where environmental protection and power conservation are prioritized, countries worldwide have begun to employ light-emitting diodes (LEDs) for a wide range of applications. LED bulbs, tubes, and street lights use white LEDs as the light sources. Because input voltage sources used vary in different countries, manufacturing a white LED driver that can be applied to various voltage sources is extremely important.
    The motivation of this thesis study and the organization of this thesis are introduced. The design and the implementation of an ultrahigh voltage (UHV) regulator are first introduced that it can generate a stable 6.5 V output voltage when the input voltage operates in 8~110 V range.
    A white LED controller with line compensation capability is designed and fabricated. This integrated circuit (IC) is designed when the input voltage is operated at 110 V or 220 V. In the IC design of this controller circuit a step-down circuit is implemented to convert a given input voltage down to 7 V. An external resistor is included in this IC to detect and maintain the current flowing through the LED at 395 mA. Because the current flowing through an LED lamp needed to be maintained within a small variation range at either 110 or 220 V input voltage, a line compensation circuit is implemented. Since the input voltage has a wide variation range a compensation circuit is designed and exploited to compensate for any input voltage variation and consequently to reduce the possible variation of the average current across the LED.
    The LED lighting is also processed with fuzzy control. Using fuzzy control in the design of LED controller it is not necessary to implement the conventional complicate mathematical operation instead it uses the empirical knowledge of the control process in the decision criterion. It uses the Simulink program to design and simulate the LED lighting control system.
    Finally a conclusion of the dissertation is made and some interesting tasks are proposed for future study.
    顯示於類別:[電機工程學系暨研究所] 學位論文


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