Reduction of settling time and minimization of transient overshoot of a buck converter

• Published in: 2016 5th International Conference on Informatics, Electronics and Vision (ICIEV) pp. 345 - 350
• Main Authors: Shabbir, Md. Nasmus Sakib Khan, Haque, Emdadul, Shams, Abdullah Bin
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-05-2016
• Subjects: CMC; Double loop; Inductors; MOSFET; pole zero cancellation; Poles and zeros; Semiconductor diodes; settling time; stable output; Switches; VMC; Voltage control
• DOI: 10.1109/ICIEV.2016.7760023

A simple two-loop control scheme for the step-down buck converter has been proposed. This is a voltage and current-mode control scheme in which for the PWM generation, an external saw tooth generator is required. The controller implementation requires a type II and type III compensator and gives quiet better performance than single current-mode and voltage mode control. The proposed controller gives lower ripple in the output voltage, reduces the settling time and keeps the output stable in case of variable input. The overshoot of the output voltage during transient time is minimized using pole-zero cancellation technique. Finally all the losses of the system are calculated where all the parameters are considered as practical.