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    Improvement of output dynamic performance of an average current mode controlled buck converter with a parallel controller
    (2010-09-17)
    Chrin, P.
    ;
    Trakuldit, S.
    ;
    Polmai, S.
    ;
    Bunlaksananusorn, C.
    This paper presents a parallel voltage controller to improve the output dynamic performance of a buck converter with Average Current Mode Control (ACMC). The parallel controller is a high-order controller synthesized from parallel connection of the two basic controllers. It is proposed to compensate the control-to-output transfer function of the converter, which has multiple poles and zeros. Up until now, the task is commonly performed by the two-pole one-zero controller, which is clearly not adequate and has somewhat limited the dynamic performance of the converter. In the paper, the design of parallel controller is illustrated with a 5V/2V ACMC buck converter. Experimental and simulated results that show the improvement of output voltage response to a step load change are presented. © 2010 IEEE.
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    Modeling and control design of a current-mode controlled flyback converter with optocoupler feedback
    (2005-12-01)
    Kleebchampee, W.
    ;
    Bunlaksananusorn, C.
    In this paper, modeling and control design of a current-mode controlled flyback converter with optocoupler feedback is presented. Small-signal models of the converter operating in Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) are derived and used in control design of the prototype converters, with the results confirmed by experiment. © 2005 IEEE.