TAS2552: setting for limiting output power?

AnBer

Part Number: TAS2552

Team,

-Is it possible to llimit the audio output power to a certain level?
-It seems that there are some registers that are reference as "limiter" (see TAS2552 DS page 31 of SLAS898B).
Can it be used to limit the output power? How? Do we have guidelines for choosing the settings?
If there are no register for this do you have some alternative suggestions?

thanks in advance,

over 4 years ago

0 Luis Fernando Rodriguez S. over 4 years ago

TI__Guru* 84915 points

Hi,

Our team will take a look at this and will provide an answer as soon as possible.

Best regards,
Luis Fernando Rodríguez S.

0 Ivan Salazar over 4 years ago

TI__Guru* 95335 points

Hi A,

Some details about the limiter are in data sheet section 7.3.10.
In addition, you can configure this feature using the GUI like below capture:

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

0 AnBer over 4 years ago in reply to Ivan Salazar

TI__Mastermind 28900 points

Hi Ivan,

Thanks!

-If I understand correctly you can both use ILIM and VLIM to limit to total output power.
Assuming that VBAT is constant then there is not ways to play with the VLIM. Correct?
In this case is ILIM the best way to limit the ouput power?

-Is there a way from the GUI to see the associated limiter cmd and payload that are sent from GUI to the EVM board?
I have seen that there are some general examples in the view/examples configurations/script menu.

Br,

0 Ivan Salazar over 4 years ago in reply to AnBer

TI__Guru* 95335 points

Vlim senses VBAT and acts like an AGC. Ilim senses current from the boost and its a hard limiter.

You can use the "record" function from the command window in the GUI to save the register configurations based on GUI settings.

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

0 Henri PINEAU over 4 years ago in reply to Ivan Salazar

Prodigy 100 points

Hi,

The power limitation is ok. But, I would like to implement a gain limitation. There is always a saturation on the output with this power limitation. I need more explanation about :

Kind regards,

Mr. PINEAU

0 Ivan Salazar over 4 years ago in reply to Henri PINEAU

TI__Guru* 95335 points

Hi Mr, Pineau,

Welcome to e2e.

Perhaps you need to increase the attack rate. We have an AppNote with detailed information about limiter here: http://www.ti.com/lit/an/slaa899/slaa899.pdf
Please let me know if this provides the required information.

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

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TAS2552: setting for limiting output power?