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A Multiphase Synchronous Buck Converter With a Fully Integrated Current Balancing Scheme

Title
A Multiphase Synchronous Buck Converter With a Fully Integrated Current Balancing Scheme
Author
유창식
Keywords
BCDMOS; current balancing; current sensor; inductor dc resistance (DCR); multiphase buck converter
Issue Date
2015-09
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON POWER ELECTRONICS, v. 30, NO 9, Page. 5159-5169
Abstract
A multiphase synchronous buck converter has been developed, in which the number of switching phases is determined by the sensed average load current. The maximum number of switching phases is four. The dc resistance (DCR) of switching inductor is used to detect the average current, which is also utilized to balance the load current among the multiple switching phases. The instantaneous inductor current is sensed as well to generate the pulsewidth modulation (PWM) signal to switch the inductors. The multiphase synchronous buck converter implemented in a 0.13-mu m BCDMOS process shows 91.1% maximum power efficiency when the input voltage is 2.8V, output voltage is 1.0V, and output current is 2.0 A.
URI
http://ieeexplore.ieee.org/abstract/document/6949694/http://hdl.handle.net/20.500.11754/27710
ISSN
0885-8993; 1941-0107
DOI
10.1109/TPEL.2014.2368130
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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