TPA3137D2: About No ferrite bead (or C) filter (Filter less)

Tao_2199

Genius 5660 points

Part Number: TPA3137D2

Hello,

When ferrite bead (or C) filter is not used (filter less), is there any impact on device?

Of cause, we think EMC requirements can't meet without output filter.

In others, is there any possible other impact on device?

Regards,

Tao_2199

over 1 year ago

0 Yanming Gong over 1 year ago

TI__Mastermind 19030 points

Hi Tao,

If no LC filter and bead, there is no impact for audio performance, but it will affect EMI and thermal performance.

Regards,

Derek

0 Tao_2199 over 1 year ago in reply to Yanming Gong

Genius 5660 points

Hello Derek,

Thank you for reply.

> but it will affect EMI and thermal performance.

What is mean " thermal performance"?

Is it mean to increasing thermal on device? Or increasing thermal on speaker?

In this case, could please you tell me about reason of the increasing thermal without output filter?

Regards,

Tao_2199

0 Yanming Gong over 1 year ago in reply to Tao_2199

TI__Mastermind 19030 points

Hi Tao,

Because of switching noise, there will be high frequency noise on output without LC filter. So it will increase power dissipation on device and speaker.

Regards,

Derek

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TPA3137D2: About No ferrite bead (or C) filter (Filter less)