Paper Info
Title
Pseudo AC current synthesizer and DC offset-corrected technique in constant-on-time control buck converter for werable electronics
Abstract
Constant-on-time (COT) control with an additional current feedback in conventional buck converter has the advantage of using low equivalent series resistance (ESR) output capacitor. Unfortunately, the disadvantage is output voltage regulation accuracy is greatly deteriorated by its DC offset voltage from the current feedback. More seriously, opposite reaction between output voltage and the additional current feedback signal deteriorates transient response. In this paper, pseudo AC current synthesizer and DC voltage offset correction technique are proposed to reduce load-dependent DC offset voltage for improving load regulation. Furthermore, the transient enhancement technique instantly extends on-time and the off-time periods in load change. Test chip fabricated in UMC 28nm CMOS process demonstrated that offset voltage is improved from 65mV to 4mV. Besides, the transient response can be improved to 4μs and 5μs when load changes from 0. 3 to 1.7A and vice versa, respectively. The advantages of compact size, low cost, and high performance power management can maintain wearable electronics small volume, light, and sustainable.
Year
DOI
Venue
2015
10.1109/ASSCC.2015.7387489
2015 IEEE Asian Solid-State Circuits Conference (A-SSCC)
Keywords
DocType
Citations 
Conventional constant-on-time (COT) control,equivalent series resistance (ESR),pseudo AC current synthesizer,DC voltage offset correction technique
Conference
0
PageRank 
References 
Authors
0.34
1
11
Name
Order
Citations
PageRank
juiche su100.34
Wei-Chung Chen2216.26
Wei-Tin Lin380.96
yingwei chou411.16
mengwei chien511.16
Chin-Long Wey631656.51
Ke-Horng Chen737990.04
Ying-Hsi Lin811230.84
Chao-Cheng Lee98618.59
shianru lin1000.34
Tsung-Yen Tsai113720.41