A Note on Low-Pass Filter Conditioning for Current-Mode Control

TL;DR

This paper establishes a rigorous large-signal stability criterion for low-pass filter conditioning in high-frequency current-mode control, addressing a gap in existing literature and aiding practical engineering applications.

Contribution

It provides the first mathematically rigorous large-signal stability criterion for low-pass filter conditioned current-mode control.

Findings

Derivation of a large-signal stability criterion

Enhanced understanding of filter effects on stability

Guidelines for practical implementation

Abstract

The low-pass filter is a classic control conditioning approach for high-frequency current-mode control. However, no existing literature discusses the large-signal stability criterion for the current-mode control with low-pass filters. This paper provides a mathematically rigorous large-signal stability criterion. The result can directly benefit the practical engineering implementation of the low-pass filter in high-frequency current-mode control.