Title :
Modeling average current mode control [of power convertors]
Author_Institution :
Unitrode Integrated Circuits Corp., Merrimack, NH, USA
fDate :
6/22/1905 12:00:00 AM
Abstract :
An averaged small signal model is presented which predicts some of the previously reported phenomena and offers new insights with analytical expressions useful for design. Detailed analysis is given for the buck converter topology with the boost and buck-boost results also provided. The modulator gain, for a first order approximation, is shown to be constant as in voltage mode control. Guidelines are presented to optimize the design of the current loop and control-to-output transfer functions are given which are necessary to compensate the voltage loop. Experimental data is provided, in the case of the buck converter, to develop and verify the model
Keywords :
DC-DC power convertors; approximation theory; control system analysis; electric current control; transfer functions; average current mode control modelling; averaged small signal model; buck converter topology; control-to-output transfer functions; current loop design optimisation; first order approximation; modulator gain; voltage loop compensation; Buck converters; Circuit topology; Equations; Inductors; Integrated circuit modeling; Predictive models; Sampling methods; Signal analysis; Signal design; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5864-3
DOI :
10.1109/APEC.2000.826113
