PCM6260-Q1: 6MHz boost converter clock EMC reference

Amelie Zheng

Genius 10865 points

Part Number: PCM6260-Q1

Hi team,

The internal boost converter clock is 6MHz, do you have some experience about this EMC design reference?

As you could see, here are some harmonic in 6MHz...

0 Carson Allen over 4 years ago

Hello,

Thanks for reaching out to TI E2E.

Could you clarify if you know that the 6MHz is separate from the all the other harmonics I can see on the frequency sweep?

I do not have design reference or data related to frequency harmonics past 20kHz.

Is the 6MHz causing more issues than all those other spikes?

And what are you inputting in this case?

Best Regards,

Carson

0 wei wu over 4 years ago

I test the signal on pcm6260 pin4（BSTSW），you can see the 6MHz clock.

0 Carson Allen over 4 years ago in reply to wei wu

Hello,

What are all the other peaks?

Best,

Carson

0 wei wu over 4 years ago in reply to Carson Allen

The other peaks are the harmonic frequency of 6MHz。

0 Carson Allen over 4 years ago in reply to wei wu

Hello,

Is this negatively impacting performance?

If it is we would need to see circuit and layout to help mitigate.

Best Regards,

Carson

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