A Novel Adaptive Quasi-Constant On-Time Current-Mode Buck Converter
Journal
Ieee Transactions on Power Electronics
Journal Volume
32
Journal Issue
10
Pages
8124-8133
Date Issued
2017
Author(s)
Abstract
There have been a variety of constant on-time (COT) controllers for dc power converter applications reported in recent years [1]-[5]. In this paper, a novel adaptive quasi-constant on-time current-mode control scheme is proposed and implemented in buck converters. While preserving the advantages of the conventional COT current-mode converters, this scheme allows fast transient response to step-load that is a critical requirement of a computer load with smart management. A small-signal model of the proposed circuit is also developed. Experimental results are also provided. This scheme is well suited for the next-generation dc converters for power management central-processor-unit devices. © 2016 IEEE.
Subjects
Buck converter; constant on-time current-mode (COTCM); describing function (DF); voltage regulators (VRs)
Other Subjects
Heterojunction bipolar transistors; Power converters; Voltage regulators; Buck converters; Central processor units; Current mode; Current Mode Control; Current-mode converters; DC power converter; Fast transient response; Voltage regulators (VRs); DC-DC converters
Type
journal article