Choosing Decoupling Capacitors Values for TS482IDT audio amplifier.

[Kenny03]

Hello,

We have an audio amplifier circuit in our design using the TS482IDT chip. We're wondering if there's any guidance on what is a good value for decoupling capacitors for the chip? Is 0.01uF acceptable? Or Could we use 0.1uF?

Thanks, 

[Issamos]

Hello @Kenny03 

You can find her the values of the Input coupling capacitor (Cin):

And the values of the Output coupling capacitor (Cout):

 

Also, you have a typical application schematic that you can use:

For more details, refer to the this document .

Best regards.

II

[AScha.3]

decoupling ...power supply ? for audio, 10u minimum close to chip, and 470uF elko somewhere.

[AScha.3]

..he write: decoupling , not coupling.

[Issamos]

Thank you for the rectification. @AScha.3. It was careless mistake.

[Kenny03]

This helps thanks, could you please give some insight as to how you arrived at 10uF? I'd like to understand the calculation or rationale behind this number.

[AScha.3 · Accepted solution]

no calculation. :)

just : this is an audio amp, so you want a cap, thats effective at frequencies < 20 kHz, but also filtering/reducing high frequ. input (spikes, noise ) ; and cheap - matching the amp price range -> ceramic caps now cheap, even in "big" values (for decoupling caps) , so i use 10u /25V X7R in 0805 size (about 10ct ); if your supply is good for audio (low impedance, low noise ) this 10u is all you need. (close to chip )

[Kenny03]

Awesome thanks for the info. This helps.