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Original question:

TAS2505-Q1: LC Filter

TAS2505-Q1: Directly drive 8ohm micro-speaker

Nick Hsiao19
Intellectual 615 points
Part Number: TAS2505-Q1

Hi Team,

Does TAS2505-Q1 support output directly drive 8 ohm micro-speaker?

Because we have SMT type speaker, I plan to remove all the bead and cap between amplifier and speaker.

  • 0
    TI__Guru** 109395 points
    Hi Nick,

    This device support filter-free operation, so this should work fine as long as the speaker impedance is within device specification (8-ohm is OK).
    Although if your system is EMI sensitive it would be recommended to use a filter. You can test its performance with and without filter.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Intellectual 615 points
    Hi Ivan,
    Thanks, I decide to serial a bead 120ohm@10MHz (DCR=0.1 ohm) with a 100pF cap shunt to ground.
    By the way, is the class D switching frequency 8.48MHz? It is a little bit high, but it is the only one value that I can found in the datasheet.
  • 0 in reply to Nick Hsiao19
    TI__Guru** 109395 points
    Nick,

    The typical switching frequency of the Class-D is 300kHz, and the Min/Max is 250/350kHz.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators