本論文主要是以基本的離散類比電路及數位電路來完成脈寬調變控制電路之功能，並說明功因修正與後級轉換器控制電路整合之優點。文中首先了解常見的脈寬調變積體電路並對其內部功能例如低電壓鎖定、震盪器等作說明及區分，再以離散元件設計脈寬調變之功能，以此來控制轉換器與功因修正電路，並將功因修正與後級轉換器之控制電路整合，兩級整合好處除了節省一組震盪器及低電壓鎖定外，也使兩級同步若再配合責任週期調變方式可減少電容之漣波電流。最後實作一整合脈寬調變控制電路來控制兩級電路以驗證其可行性，其輸入電壓為90~130V，輸出為12V/4A，最高效率可達86%。

　　In this thesis, the basic analog components and digital components are used to fulfill the function of pulse width modulation integrated circuit (PWM IC). The advantages of the combined control circuit of power factor corrector (PFC) and PWM are also discussed. The function of PWM IC is described and classified and then discrete components are used to design the function of PWM IC based on these information. The PWM control circuit is experimentally performed and is used to control converter and PFC separately. Finally, the PFC and PWM controllers are integrated together to control two stages power converter. The two stages power converter with input voltage range 90~130V and 12V/4A output is experimentally performed. The experimental results are used to verify the functionality of the proposed circuit and the maximum efficiency of the two-stage converter is 86%.

[1] A. I. Pressman, ”Switching Power Supply Design,” Second Edition,
McGraw-Hill, 1998.
[2] N. Brown, T. M. Undeland, and W. P. Robbins, “Power Electronics:
Converters, Applications and Design,” Second Edition, John Wiley &
Sons, 1995.
[3] TL494 Data Sheet, ON Semiconductor , 2004.
[4] ON Semiconductor, A Simplified Power Supply Design Using The
TL494 Control Circuit, 2002.
[5] Texas Instruments, Designing Switching Voltage Regulators With
TL494, 1989.
[6] UC3525 Data Sheet, Texas Instruments, 1997.
[7] UC3842/3/4/5 Data Sheet, Texas Instruments, 1997.
[8] Unitrode, UC3842/3/4/5 Provides Low-cost Current-mode Control.
[9] UC3825 Data Sheet, Texas Instruments, 1997.
[10] Unitrode, 1.5MHz Current Mode IC Controlled 50 Watt Power
Supply, 1999.
[11]鄭宏良， ”單級高功因降升壓式螢光燈電子安定器” ，國立中山大學電機工程學系博士論文，中華民國九十年。
[12] K. H. Liu, Y. L. Lin, ”Current waveform distortion in power factor
correction circuits employing discontinuous-mode boost converters”
, IEEE PESC, 1989, pp. 825-829.
[13] H. Endo, T. Yamashita, T. Sugiura, ” A high-power-factor buck
converter” , IEEE PESC, 1992, pp. 1071-1076.
[14] J. S. Lai, D. Chen, ” Design consideration for power factor correction boost converter operating at the boundary of continuous conduction mode and discontinuous conduction mode” , IEEE APEC, 1993, pp. 267-273.
[15] NCP1212 Data Sheet, ON Semiconductor, 2004.
[16] ST Microelectronics, L6561, Enhanced Transition Mode Power
Factor Corrector, 1998.
[17] UCC38500 Data Sheet, Texas Instruments, 1999.
[18] UCC3817 Data Sheet, Texas Instruments, 2000.