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Digital Predictive Feed-Forward Controller for a DC–DC Converter in Plasma Display Panel

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5 Author(s)

This paper describes a new digital control method to enhance the dynamic performance of a dc-dc converter used in plasma display panel (PDP). A simple digital PID compensator with duty ratio feed-forward control is proposed to minimize the output voltage variation while the load current is continuously changing. The duty ratio feed-forward is calculated using noise-free load current information which is predicted by the available video data of the PDP. No separate current sensing circuit is required. A small signal z-domain feed-forward model is derived for the performance analysis and controller design. The proposed control method is experimentally verified on an asymmetrical half bridge dc-dc converter which supplies power to a 42 in PDP.

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Power Electronics, IEEE Transactions on  (Volume:23 ,  Issue: 2 )