TAS5825M: TAS5825M PVDD cap selection

Bo Xian Yeh

Intellectual 1425 points

Part Number: TAS5825M

Hi Expert,

Want to check that if I use two TAS5825M for 2.2ch design, for PVDD cap selection, what's minimum cap I can use?

Because we have board size concern. From datasheet and EVM, use 390uF but the size is too big.

Thanks.

over 1 year ago

+1 Shadow He over 1 year ago

TI__Guru 51860 points

Hi Bo

For simplify, when there's 1A PVDD current needed, and the capacitor using 100uF, you'll get around 1V ripple voltage with audio frequency. The ripple voltage ratio to the PVDD current, and inverse to the capacitance. Usually suggest to keep PVDD-1/2ripple voltage still higher than your output power requirement, otherwise the output THD will decrease from clipping.

0 Bo Xian Yeh over 1 year ago in reply to Shadow He

TI__Intellectual 1425 points

Hi Shadow,

Noticed with thanks.

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TAS5825M: TAS5825M PVDD cap selection