Work

Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

Year: 2021

Type: article

Abstract: A control circuit for the auxiliary buck/boost converter was designed and implemented to improve the load transient response of the buck converter. The circuit shapes the auxiliary inductor current in the critical conduction mode through peak current mode control. The soft-switching operation of the auxiliary switches minimizes the power loss and thus increases the efficiency of the auxiliary converter. Along with the design guidelines and estimated power loss to improve the performance of the proposed control technique, the implementation of the control circuit is explained in detail. Simple analog ICs such as operational amplifiers and comparators, and a couple of logic gates suffices the realization of the proposed control. A prototype buck converter whose input voltage, output voltage, and switching frequency were 15 V, 3.3 V, and 200 kHz, respectively were tested with the implemented control circuit to verify the performance of the proposed control technique.

Source: IEEE Access

DOI: 10.1109/access.2021.3049139

Authors: Dongwook Kim, Jongun Baek, Jisu Lee, Joonho Shin, Jong-Won Shin

Institution: Chung-Ang University

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,750

Funders: National Research Foundation, Chung-Ang University, Ministry of Education, National Research Foundation of Korea