NDLI: Pseudo-Constant Switching Frequency in On-Time Controlled Buck Converter with Predicting Correction Techniques

Content Provider	IEEE Xplore Digital Library
Author	Wei-Chung Chen Hsin-Chieh Chen Meng-Wei Chien Ying-Wei Chou Ke-Horng Chen Ying-Hsi Lin Tsung-Yen Tsai Shian-Ru Lin Chao-Cheng Lee
Copyright Year	1986
Abstract	The predicting correction technique (PCT) is proposed to achieve an adaptive on-time control for ripple-based buck converters. The switching frequency fSW variation is suppressed when the PCT technique considers complete parasitic resistances of the components and devices. Even without extra clock-controlled circuits and current sensing circuits, the buck converter operates with a nearly constant fSW over a wide load range. Parasitic resistances almost cause no influence and restriction on f_SW. Only input voltage is used to predict the adaptive on-time. Measurement results show only 0.32% in Δf_SW/f_SW and 5.7 kHz/A in Δf_SW/ΔI_LOAD in case of 1.4 A load current change and f_SW is 2.5 MHz. Consequently, a pseudo-constant f_SW with well-defined noise spectrum strongly benefits the solution of electromagnetic interference (EMI) for system-on-a-chip (SoC) applications.
Sponsorship	IEEE Power Electronics Society
Starting Page	3650
Ending Page	3662
Page Count	13
File Size	4500371
File Format	PDF
ISSN	08858993
Volume Number	31
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switching frequency Electromagnetic interference System-on-chip Voltage control Switches Clocks Predicting correction technique (PCT) On-time control switching frequency Adaptive on-time control dc–dc converter direct current resistance on resistance on time control predicting correction technique (PCT)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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