TAS5711PHPEVM: How to calculate the PVDD voltage

Edgar Lin1

Prodigy 180 points

Part Number: TAS5711PHPEVM

Hi TI Audio Team

We are using TAS5711 to design our smart speake.

Could you guide how to calculate the PVDD voltage with below speaker configuration?

SE x 2, 10W, 4 ohm

BTL x 1, 5W, 4 ohm

Thanks,

Edgar

over 4 years ago

0 Xiaolin Qin over 4 years ago

TI__Expert 6295 points

hello Edgar,

do you mean single TAS5711 to support 2.1Mode SE x 2, 10W, 4 ohm+ BTL x 1, 5W, 4 ohm?

if this is the case. what is THD 1% or 10% for this 10W and 5W case?

Regards

Linda

0 Edgar Lin1 over 4 years ago in reply to Xiaolin Qin

Prodigy 180 points

Hi Linda

Yes, I means single TAS5711 to support 2.1 Mode with SE x2 ,10W, 4 ohm + BTL x 1,5W,4 ohm.

The THD of both are 1%.

Please let mke know how to calculate the PVDD voltage and total power consumption.

Thanks,

Edgar

0 Matthew Miao over 4 years ago in reply to Edgar Lin1

TI__Expert 6720 points

Hi Edgar,

It's suggested to refer datasheet Output power vs Supply Voltage.

As below figure shows, SE output THD is worse than BTL, so 10W for 4ohm load @1% THD, PVDD need 20V.

Regards,
Matthew

0 Edgar Lin1 over 4 years ago in reply to Matthew Miao

Prodigy 180 points

Hi Mattew

1.If PVDD is 20V, the ouput power of BTL will over 20W.This is over our BTL speaker spec(5 W).

How to limite the output power of BTL to MAX 5W when the PVDD is 20V.

2.When PVDD is 20V, how to know the MAX output current?

I need the power consupumtion data to evaluate which POE type is suitable for our design. AT(25.5W) or BT( MIN 40W)??

Thanks,

Edgar

0 Matthew Miao over 4 years ago in reply to Edgar Lin1

TI__Expert 6720 points

Hi Edgar,

1. BTL 20W @20V is the max output power. You need to use DRC to limit audio output power for all channels (Includes SE channels).

2. Max peak output current is related to your DRC configuration peak output power. As for POE design, you can refer continues output power efficiency. For rough 80% efficiency, then POE needs at least 31.25W only for audio amp three channels output (10W*2 SE, 5W BTL).

Regards,

Matthew

0 Edgar Lin1 over 4 years ago in reply to Matthew Miao

Prodigy 180 points

Hi Matthew

Thanks for your reply.

I have a final question, could you please provide the layout file of TAS5711EVM to me??

Thanks,

Edgar

0 Matthew Miao over 4 years ago in reply to Edgar Lin1

TI__Expert 6720 points

Hi Edgar,

You can find TAS5711 EVM Gerber file with below product folder:

http://www.ti.com/tool/TAS5711PHPEVM?keyMatch=TAS5711%20EVM&tisearch=Search-EN-everything

Regards,

Matthew

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TAS5711PHPEVM: How to calculate the PVDD voltage