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Improvement of output dynamic performance of an Average Current Mode Controlled buck converter with a parallel controller

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4 Author(s)
Chrin, P. ; Electr. & Energy Dept., Inst. of Technol. of Cambodia (ITC), Phanom Penh, Cambodia ; 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.

Published in:

Power Electronics Conference (IPEC), 2010 International

Date of Conference:

21-24 June 2010