TAS5825M: Audio system with long wires, EMI?

Scutarius

Part Number: TAS5825M
Other Parts Discussed in Thread: TPA3110D2

Tool/software:

Hi,

I am using the amplifier TAS5825M in PBTL mode to drive a sub-woofer, using a long cable (3meters) I know is a good idea to have the pair twisted with audio and as this is Class-D (PWM) should I include shielding too?

This is for a product that has Bluetooth and is going to be certified and sold in the US.

Thank you.

4 months ago

0 Sydney Northcutt 4 months ago

TI__Mastermind 18020 points

Hello,

Shielding would definitely improve the EMI performance. I recommend testing without the shielding to see if you already meet your EMI requirements. If so shielding will not be necessary.

Regards,
Sydney Northcutt

0 Scutarius 4 months ago in reply to Sydney Northcutt

Prodigy 90 points

Would you please explain why a twisted wire was used for the TPA3110D2
Thanks

+1 Sydney Northcutt 4 months ago in reply to Scutarius

TI__Mastermind 18020 points

Hello,

The speaker wires were twisted to help EMI performance, the same way that you are twisting your speaker wires. Twisting the wires helps protect signal integrity and reduce chances of interferences.

Regards,
Sydney Northcutt

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TAS5825M: Audio system with long wires, EMI?