Design of adaptive fuzzy logic controller for LED driving circuit

DC-DC booster converter in PWM switch mode is used for high power white LED. Electromagnetic interference, load disturbance, etc existing in circuits make their analysis and control difficult. Because of this, on the basis of tradition PI controller an adaptive fuzzy logic controller is designed to adjust real time PI parameter through introducing two correction factors. The controller is then obtained through innovative search. The simulation results show that the Controller does not only make driving circuit have stronger response ability, but also effectively depress the overshoot.