標題: Differential Zero Compensator in Delay-Ripple Reshaped Constant On-Time Control for Buck Converter with Multi-layer Ceramic Capacitors
作者: Chen, Wei-Chung
Lin, Chia-Ching
Chen, Ke-Horng
電機工程學系
Department of Electrical and Computer Engineering
關鍵字: Constant on-time;fast transient response;ceramic capacitor;DC-DC converter
公開日期: 2012
摘要: a differential-zero-compensator (DZC) technology in constant on-time control dc-dc buck converter which can be applied for the ceramic capacitors is proposed in this paper. Ceramic capacitors are widely used in industry because its low cost. However, the stability often confronts with the sub-harmonic problem related to the incorrect output capacitor and ESR used. In this paper, the proposed DZC technology remits the limitation without adding extra pins and the complexity of circuit still maintain simple. Furthermore, the proposed self-compensated on-time timer (ONT) offers the reliable on-time period with linear solution. In addition, utilizing ceramic capacitor derives smaller ripple of 8mV at 8A. High efficiency of 92.5 % can be guaranteed due to the small ESR value. Stability criteria analysis and simulation results demonstrate that the stability can be ensured even if the ESR is small than 2m Omega.
URI: http://hdl.handle.net/11536/21557
ISBN: 978-1-4673-0219-7
ISSN: 0271-4302
期刊: 2012 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS 2012)
起始頁: 692
結束頁: 695
Appears in Collections:Conferences Paper