ABSTRACT
This chapter provides the basic information for understanding feedback control methods, as applied to power electronic converters. Before the advent of switched-mode power supplies, power semiconductor devices were used to regulate a voltage in analog mode. The advantage of having a good mathematical model resides in the possibility to control various parameters of the original system with a feedback control system. Since the control of most power supplies is implemented within mixed-mode integrated circuits, actual compensation law is carried out with operational amplifiers and a passive compensation network. Since most power supplies fall within one of these four categories, each case is considered herein for the design of the control law. The four categories: analog-mode power supply in follower topology, analog-mode power supply with inverting topology, boost converter and buck converter. A good understanding of the control system behind power electronics hardware is necessary not only for horizon development, but also because the control system influences design decisions in hardware.
