Abstract
Design and implementation of control systems for power supplies require the use of efficient techniques that provide simple and practical solutions in order to fulfill the performance requirements at an acceptable cost. Application of manual methods of system identification in determining optimal values of controller settings is quite time-consuming, expensive and, sometimes, may be impossible to practically carry out. This paper describes an analytical method for the design of a control system for a fast transient response, low dropout (LDO) linear regulated power supply on the basis of PID compensation. The controller parameters are obtained from analytical model of the regulator circuit. Test results showed good dynamic characteristics with adequate margin of stability. This study shows that PID parameter values sufficiently close to optimum can easily be obtained from analytical study of the regulator system. The applied method of determining controller settings greatly reduces design time and cost.
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