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OPA541:audio amp.

Martin Kovacik
Prodigy 20 points
Part Number: OPA541


Tool/software:

Hello,

I would like to know if I can use this circuit in quasi as audio amplifier application for a frequency band of 8-40kHz into an inductive load of 4 Ohm. The source of the audio signal is a swept sine wave.


Thank you

  • 0
    TI__Genius 15826 points

    Hey Martin,

    Yes, you can use the OPA541 as a monolithic power amplifier. OPA541 handles inductive loads well. What is the power output you are looking to achieve in this application?

    When you say inductive load of 4Ohm, are you specifying the DCR component of the inductance, or are you specifying the impedance at a certain frequency?

    Thanks,

    Jacob 

  • 0 in reply to Jacob Nogaj
    Prodigy 20 points

    Hi Jacob,

    thank you for the answer. The load will be a high-performance tweeter and the required power is up to 50W sine wave: 8-40kHz.

    The quality of the amplified signal is not important.

    I need to test one type of speaker under long-term load and high frequencies. I need to detect wear or damage to the speaker during a several-hour test.

  • 0 in reply to Martin Kovacik
    TI__Genius 15826 points

    Hi Martin,

    Thanks for the details, I understand now. 

    Be sure to throw a suitable heatsink on the OPA541, and you should be all good to go for your testing.

    Please let me know if you have any other questions on the OPA541. 

    Best,

    Jacob

  • 0 in reply to Jacob Nogaj
    Prodigy 20 points

    Hi Jacob,

    Thanks for info. I will be careful.

    Martin