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TAS2559EVM: How can view register map, beep from TAS2559

Koyo Asaishi
Intellectual 1710 points
Part Number: TAS2559EVM
Other Parts Discussed in Thread: TAS2559, TAS5825M

Hello team,

I have several questions regarding TAS2559EVM.

  1. I can't find registor map of TAS2559 although TAS5825M have an option of registor map. How can I see register of TAS2559?
  2. I take a hot wind to EVM board to check if measured speaker temp is raised. But the EVM stop working and output beep sound. Is this operation met your expectation? When I take a hot wind to speaker there is not beep but to IC on EVM board, beep is output.

  3. I found speaker temp is raised immedeately when vocal start but speaker temp is decreased just slowly when vocal stop. Why are they different behaivior?

Best regards,
Koyo

  • 0
    TI__Guru* 95175 points

    Hi Koyo,

    If you need to read back the device registers, you may use I2C monitor tool to run a read all registers and repeat for each page, however this doesn't have register description as other devices do.

    You mean you're heating up the device? or the speaker? The speaker protection algorithm is monitoring the speaker temperature as an estimate based on the IV feedback from it. It is not actually measuring temperature directly.

    The slow ramp down on temp may be due to some timing parameters on the protection, or it can also be some parameter from the speaker characterization.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    TI__Intellectual 1710 points

    Hi Ivan,

    Thanks for the answers.

    Regarding 1st question, I understand. I hope all devices can view register map easily.

    Regarding 2nd, I was heating up TAS2559 IC on the EVM for just 1sec by dryer. Then, speaker output beep sound but I don't find any description that this IC or EVM have this function. 

    Regarding 3rd, is this typical behaivior, only for TAS2559 or only my situation? If all amps are similar behaivior you have exact reason. The speed of ramp up and down are clearly different so I don't think this is because of some parameters difference.

    Best regards
    Koyo

  • 0 in reply to Koyo Asaishi
    TI__Guru* 95175 points

    Hi Koyo,

    I wouldn't expect a beep sound to be produced at higher temperatures, that seems odd to me. Perhaps there's something else going on during that test. Can you monitor the inputs to the device during the test? Also can you share more details about this beep? Is it always a specific frequency and amplitude tone? Is this beep stopping after removing the heat?

    Attack and release times can be different, that's why I mentioned parameters could cause the difference in ramp up and down. Please share your PPC3 file along with details on the speaker data sheet and characterization parameters if possible.

    Best regards,
    -Ivan Salazar
    Applications Engineer