sampled-data modeling pwm iTECHNICAL RESEARCH REPORT Sampled-Data Modeling and Analysis of PWM DC-DC Converters Part I. Closed-Loop Circuits by C.-C. Fang, E.H. Abed T.R. 98-54 ISR develops, applies and teaches advanced methodologies of design and analysis to solve complex, hierarchical, heterogeneous and dynamic problems of engineering technology and systems for industry and government. ISR is a permanent institute of the University of Maryland, within the Glenn L. Martin Institute of Technology/A. James Clark School of Engineering. It is a National Science Foundation Engineering Research Center. Web site http://www.isr.umd.edu I R INSTITUTE FOR SYSTEMS RESEARCH Sampled-Data Modeling and Analysis of PWM DC-DC Converters I. Closed-Loop Circuits Chung-Chieh Fang and Eyad H. Abed Department of Electrical Enginee……