TPA3220: PIN 21"AVDD" and PIN 22 "GVDD" datasheet VS EVM

Giorgio Actis

Part Number: TPA3220

Hi,

in datasheet "AVDD" is connect to +5V and "GVDD" is connect to CRC filter (1uF-3R3-1uF) at +5V,
but in EVM "AVDD" is connect to CRC filter (1uF-3R3-1uF) at +5V and "GVDD" is connect to +5V

What is the correct layaut?

Thanks.

over 1 year ago

+1 Wei Qiu over 1 year ago

TI__Expert 5170 points

Hi Giorgio.

GVDD is supply voltage for gate-drive circuitry. So it will have some switching frequency ripple on GVDD.

If use the same power supply to power AVDD and GVDD, it is more recommend to use a CRC filter like first picture to avoid influence AVDD.

BR.

Wei Qiu.

0 Giorgio Actis over 1 year ago in reply to Wei Qiu

Prodigy 20 points

thanks.

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TPA3220: PIN 21"AVDD" and PIN 22 "GVDD" datasheet VS EVM