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TAS5720L: PVDD selection for TAS5720L

Part Number: TAS5720L

Hi,

I am fairly new to designing audio hardware. This post is to just reassure that my understanding is correct. Initially I was confused regarding what my ideal PVDD value should be.

We are planning to use the following speaker with a rated power of 3W and maximum power of 5W.

www.digikey.com/.../1745572

My understanding now is that PVDD does not have any direct relation to the output audio signal amplitude, but if the signal is above PVDD, it will be clipped.

So to get the speaker working output power in the 3W-5W range, I need around 6.5V PVDD atleast as per Ohm's law. Maybe around 8-10V just to be safe.

Now if I have a PVDD that can potentially drive more power than the speaker can tolerate, I need to limit the signal amplitude using amplitude control and/or digital clipper so that the maximum power ratings of the speaker is no exceeded.

Please point out if my understanding is wrong.

  • Hello Sreedev,

    For the PVDD you can refer to the Output power vs supply voltage graph plots we have in the datasheet to help determine what supply voltage you want to use for what load and output power. 

    Also you are correct that you would need to limit the signal amplitude if you don't want to exceed the maximum power rating if you have a PVDD can drive more power than your speaker is rated for.

    Best regards,

    Luis