Open AccessHigh‐performance digital replica of analogue peak current mode control for DC–DC converter
Author(s) -
Taeed Fazel,
Nymand Morten
Publication year - 2016
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2015.0166
Subject(s) - replica , flyback converter , current (fluid) , forward converter , electrical engineering , mode (computer interface) , digital to analog converter , control (management) , computer science , control theory (sociology) , electronic engineering , boost converter , engineering , voltage , artificial intelligence , geography , archaeology , operating system
A simple and robust digital peak current mode controller is proposed in this study. The controller replicates an analogue peak current mode control in the discrete domain. The inner current loop has negligible delay, which results in a high controller bandwidth. The controller structure allows the compensation slope to be updated in each switching cycle; therefore, the controller can maintain a high bandwidth over a wide range of operating points. The modelling principles of an analogue peak current mode controller are used to model the proposed controller. For experimental verification, the controller is implemented in a field programmable gate array to control a 100 W buck converter. The measured loop gain of the system correlates very well with the modelling results. The achieved controller crossover frequency is ∼1/10 of the switching frequency which is close to the crossover frequency of analogue peak current mode controllers.