TPA3244: 18W at PVDD 12V

[FAE] Andrew Wang

Genius 10685 points

Part Number: TPA3244

Hi Team,

Can this device achieve 18W at PVDD 12V with THD 1% & load of 4 ohms?

Thanks!

Amdrew

over 5 years ago

0 Sam(MPAA) Zhang over 5 years ago

TI__Mastermind 19080 points

Hi Andrew,

Given your condition, 18W is just on the boundary of voltage clipping. 12*12/2/4=18W. In this case, it's not limited by the device capability but the PVDD voltage.

To make sure you can meet the spec, I think you need to increase PVDD voltage or use lower resistance speakers.

Thanks!

Regards,

Sam

0 [FAE] Andrew Wang over 5 years ago in reply to Sam(MPAA) Zhang

TI__Genius 10685 points

Hi Sam,

May I know your quick way of calculating this?

I can understand V^2 = 12*12, and load is4 ohms.

but I cannot understand your formula, what is '2' mean?

Thanks!

Andrew

0 Sam(MPAA) Zhang over 5 years ago in reply to [FAE] Andrew Wang

TI__Mastermind 19080 points

Hi Andrew,

It comes from the Vrms^2 = Vp^2/2. In BTL, the Vp=PVDD.

Thanks!

Regards,

Sam

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TPA3244: 18W at PVDD 12V