NDLI: Digital power controller with sensorless DCM operation

Content Provider	IEEE Xplore Digital Library
Author	Abu Qahouq, J.A.
Copyright Year	2010
Description	Author affiliation: The University of Alabama, Department of Electrical and Computer Engineering, Tuscaloosa, 35487, USA (Abu Qahouq, J.A.)
Abstract	This paper presents a sensorless digital controller method that is able to detect the switching power converter's inductor current zero-crossing point and operate in discontinuous conduction mode without the need for sensing the inductor current. The presented controller is based on minimizing the duty cycle of the upper side switch of the DC-DC buck power converter while perturbing the lower side switch turn off time. Since the inductor current sensing and its zero-crossing point detection are eliminated, the associated noise and ringing issues are eliminated and there is no need for high speed sensing and sampling of the inductor current, which is of advantage especially at high switching frequencies and when digital controller is used. An algorithm to realize this concept is discussed and experimental results are presented.
Starting Page	234
Ending Page	236
File Size	438408
Page Count	3
File Format	PDF
ISBN	9781424452866
DOI	10.1109/ECCE.2010.5618039
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switching Power Converter Discontinuous Conduction Mode (DCM) Switches Converters Digital Control Synchronous Rectification Inductors Voltage control DC-DC Sensorless Switching frequency Current Sensing Sensors Continuous Conduction Mode (CCM) Sensor
Content Type	Text
Resource Type	Article

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