標題: A Pseudo Fixed Switching Frequency 2kHz/A in Optimum On-Time Control Buck Converter with Predicting Correction Technique for EMI Solution
作者: Chen, Wei-Chung
Lin, Kuei-Liang
Chen, Ke-Horng
Lin, Ying-Hsi
Tsai, Tsung-Yen
Huang, Chen-Chih
Lee, Chao-Cheng
Tai, Zhih Han
Cheng, Yi Hsuan
Tsai, Chi Chung
Luo, Hsin-Yu
Wang, Shih-Ming
Chen, Long-Der
Yang, Cheng-Chen
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: On-time control;switching frequency;optimum on-time;DC-DC converter;on-resistance;direct current resistance
公開日期: 1-Jan-2014
摘要: This paper repots an optimum on-time (OOC) control with predicting correction technique (PCT) for ripple-based buck converter. The switching frequency (F-SW) variation is analyzed with completely considering the parasitic resistances of the components and devices. The proposed converter achieved nearly constant switching frequency over a wide load range without extra clock controlled circuits and current sensing circuits. The parameters of the parasitic resistances almost cause no influence and no restriction on F-SW performance. Actually, only the input voltage is necessary to predict the optimum on-time, and this work benefits the decease on total pin numbers. The simulation results demonstrate 0.375% Delta F-SW/F-SW and 2kHz/A Delta F-SW/Delta I-LOAD over 1.5A load current change. Consequently, pseudo constant F-SW with known noise spectrum strongly benefits the solution of electromagnetic interference (EMI) issue for system-on-chip (SoC).
URI: http://hdl.handle.net/11536/124898
ISBN: 978-1-4799-3432-4
ISSN: 0271-4302
期刊: 2014 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
起始頁: 946
結束頁: 949
Appears in Collections:Conferences Paper