Two-Loop Voltage-mode Controller for 4th-order Buck Converter

This paper presents a simple two-loop voltage-mode control scheme for the buck converter with input filter. In this voltage-mode control scheme the controller do not need any external saw-tooth generator for PWM generation and the loop design is also easier. The controller implementation requires only a single compensator in the outer loop and gives almost current-mode control performance. The proposed controller effectiveness is demonstrated through simulations using PSIM power electronics simulator.