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Tapping power for I2S amp card / speaker

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Tapping power for I2S amp card / speaker 5 years 9 months ago #32346

  • kotani
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Hello! I'm thinking about using a I2S input class D amp to power a speaker from the output of the UMA-8. I have a question about the power supply.

The amp module I'll be using is a MAX98357A. It can take any input from 2.7v to 5.5v.

Can I tap the J2.2 or J2.4 pin for 3.3v power? How much current can I draw from this pin?

Otherwise, I would prefer drawing 5v from the USB input, if possible. Is there a convenient location for this, or is it not recommended.

Please let me know. Thank you!

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Tapping power for I2S amp card / speaker