Transcription of LC Filter Design (Rev. A) - Texas Instruments
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1 SLAA701A October2016 RevisedNovember2016 SubmitDocumentationFeedbackCopyright 2016,TexasInstrumentsIncorporatedLC FilterDesignAll trademarksare the propertyof October2016 RevisedNovember2016LC FilterDesignABSTRACTIn higher-powerclass-Damplifiers,generallya bove10 W of outputpower,a filteron the outputof theamplifieris filteris passivein natureand usesbothan inductorand a capacitoron ,it is referredto as an LC the LC filteriscriticalto meetthe desiredaudioperformance,efficiency,EMC/E MIrequirements,and costfor the a guideto aid in the sectionof LC filtercomponentsforclass-Damplifiersto meettarget-designgoalsof the end (BTL).
AD modulation has no significant common-mode switching content in its output. However, there is a common-mode DC voltage due to the average value of the PWM switching. Because both sides of the load see this DC voltage level, it does not contribute to power dissipation across the load. This DC voltage is equal to PVDD / 2, or half of the supply ...
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