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This paper presents a methodical approach for the development of sliding mode controlled audio amplifier suitable for mid power audio applications. Various design aspects which includes the practical problem will be addressed with the appropriate solution. An easy to follow design strategy to build a 20W, 20Hz to 20kHz audio amplifier is described. Experimental result of the prototype with a 4Ω loudspeaker...
R-modeled speaker fed by sliding mode(SM) controlled half bridged audio amplifier(HBA) show significant phase difference between reference voltage and speaker current. The causes of phase difference possibly are inaccurate speaker model and phase lead/lag introduced by the output filter. To investigate phase difference, the transfer function of HBA and approximated first order model of the speaker...
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