Determination of over current protection thresholds for class D audio amplifiers

Flemming Nyboe, L Risbo, Pietro Andreani

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    Monolithic class-D audio amplifiers typically feature built-in over current protection circuitry that shuts down the amplifier in case of a short circuit on the output speaker terminals. To minimize cost, the threshold at which the device shuts down must be set just above the maximum current that can flow in the loudspeaker during normal operation. The current required is determined by the complex loudspeaker impedance and properties of the music signals played. This work presents a statistical analysis of peak output currents when playing music on typical loudspeakers for home entertainment.
    Original languageEnglish
    Title of host publicationProceedings of 23rd NORCHIP Conference
    Publication date2005
    Article number1597005
    ISBN (Print)1-4244-0064-3
    Publication statusPublished - 2005
    Event2005 IEEE 23rd NORCHIP Conference - Oulu, Finland
    Duration: 21 Nov 200522 Nov 2005


    Conference2005 IEEE 23rd NORCHIP Conference
    Internet address

    Bibliographical note

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