TPA2008D2: Standard deviation of Switching frequency

Kuramochi Tadahiko

Part Number: TPA2008D2

Hi,

How much is standard deviation of switching frequency?

My customer is considering that switching frequency set 225kHz and 275kHz for two ICs to avoid audible noise by frequency interference.

Best Regards,

Kuramochi

over 5 years ago

0 Ivan Salazar over 5 years ago

TI__Guru** 102795 points

Hi Kuramochi,

If oscillator components Rosc/Cosc have low tolerance, I think you could consider the set frequency as a typical value, so standard deviation would be 1 sigma.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Kuramochi Tadahiko over 5 years ago in reply to Ivan Salazar

Guru 28715 points

Hi,

Thank you for your help.

Does it mean that dispersion of switching frequency is small if frequency is set to recommended range?

Best Regards,

Kuramochi

0 Ivan Salazar over 5 years ago in reply to Kuramochi Tadahiko

TI__Guru** 102795 points

Kuramochi-san,

Yes, it should follow the performance of other devices with internal oscillator. Take into account that precision (low tolerance) components should be used.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

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TPA2008D2: Standard deviation of Switching frequency