Current-Voltage-Dual-Mode DC-DC Buck Converter with Adaptive Clock Control

You Te Chiu, Yu Hsuan Liu, Ming Rui Tsai, Chung Chih Hung

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a novel high-efficiency and fast-transient current-voltage-dual-mode (CVDM) dc-dc buck converter using adaptive clock controller (ACC). The proposed CVDM control can stably switch the control method between current mode and voltage mode to improve the performance according to different situations. By using the ACC technique, the circuit can dynamically and smoothly adjust the switching frequency during the transient response to improve the undershoot, overshoot voltage, and recovery time. In this work, only an output inductor, capacitor, and feedback resistors are outside the system on chip (SoC). The transient recovery time and undershoot voltage are less than 5μs and 60mV, respectively, for the load current change from 50mA to 500mA. The maximum conversion efficiency is 95% at 100mA load current. Above 90% conversion efficiency can be achieved for load current from 30mA to 600mA. With the proposed techniques, the performance of the dc-dc converter is improved significantly.

Original languageEnglish
Title of host publication2019 IEEE 62nd International Midwest Symposium on Circuits and Systems, MWSCAS 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages738-741
Number of pages4
ISBN (Electronic)9781728127880
DOIs
StatePublished - Aug 2019
Event62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019 - Dallas, United States
Duration: 4 Aug 20197 Aug 2019

Publication series

NameMidwest Symposium on Circuits and Systems
Volume2019-August
ISSN (Print)1548-3746

Conference

Conference62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019
CountryUnited States
CityDallas
Period4/08/197/08/19

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