科研之友
微信
新浪微博
Facebook
分享链接
摘要
A new multifrequency small-signal control model for high-bandwidth dc buck regulator is proposed. The describing function approach is taken to model the duty-cycle modulator, incorporating the effects of not only the modulating frequency f(m), the switching frequency f(s), and the two sideband frequencies f(s) - f(m) and f(s) + f(m). This model is significantly more accurate than the conventional average model and the recently proposed two-frequency model for applications with high control bandwidth-to-switching frequency ratio and high input-to-output voltage step down ratio, such as the v-core voltage regulators. The model is verified by simulations and experiments.
- 出版日期2016-1
