DC Regulation and Loop Gain Analysis of a DC-DC Switch Mode Power Supply: A Case Study on a Synchronous PWM Controlled Buck Converter

Authors : Cağfer Yanarateş, Aytaç Altan

Pages : 1014-1021

Doi:10.34248/bsengineering.1532974

View : 64 | Download : 69

Publication Date : 2024-09-15

Article Type : Research Paper

Abstract :This study investigates the DC regulation of a DC-DC buck converter operating with pulse width modulation (PWM), taking into account the internal resistance of the coil and the on-resistance of the switching device. The effect of these parameters on the input/output disturbances is analyzed in continuous-conduction mode under constant frequency voltage mode control. The study also explores the effect on loop gain using the IRU3037 8-pin IC synchronous PWM controlled buck converter. The transfer function of the IRU3037 IC is derived from datasheet values using state-space averaging and AC small signal methods. A Type II compensator is then designed based on the derived transfer function. In addition, the step response characteristics of the open-loop and closed-loop circuits are investigated by time domain analysis.
Keywords : Anahtarlamalı güç kaynağı, IRU3037 entegre devre, Senkron PWM kontrolü, Döngü kazanç analizi, Tip II kompansatör