东南大学学报（自然科学版）2012，Vol.42Issue(6)：1058-1062,5.DOI:10.3969/j.issn.1001-0505.2012.06.007
一种数字控制可变输出DC-DC转换器的设计
Design of digital controlled DC-DC converter with variable output voltage
摘要
Abstract
Aiming for the dynamic voltage scaling technology in SoC ( system on chip) , a digital controlled DC-DC Buck converter with variable output voltage is designed. First, a trajectory prediction method based on system model is used. Based on the sampling values of the inductor current and the output voltage at the current switching cycle, the inductor current and the output voltage at the next switching cycle are predicted according to the characteristics of energy storage devices such as inductor and capacitor. Then, these predictive values are used to substitute the actual sample values, which can compensate the loop time delays and improve the transient responses. Besides, the multiple-sample technology is adopted to minimize the effect of random noise. The circuit is designed on the SMIC 65 nm process. The experimental results show that when the maximum deviation between the prediction values and the actual ones is less than 15 mV, the steady-state error of the output voltage can be controlled within 5 mV. When the load current and the reference voltage change, the transient response time of the output voltage are 122. 3 and 476. 1 μs,respectively. The line regulation is 14. 37% .关键词
DC-DC转换器/数字控制/预测算法/多采样/可变输出Key words
DC-DC converter/ digital control prediction algorithm/ multi-sampling/ variable output分类
信息技术与安全科学引用本文复制引用
王青,王绍权,黄秋华,陈秀玲,徐申,孙伟锋,时龙兴..一种数字控制可变输出DC-DC转换器的设计[J].东南大学学报（自然科学版）,2012,42(6):1058-1062,5.基金项目
江苏省自然科学基金资助项目(BK2010167)、江苏省"青蓝工程"资助项目. （BK2010167）
