2023-09-14 01:52 PM
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,
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2023-09-15 10:47 AM - edited 2023-09-15 11:04 AM
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 )
2023-09-14 02:25 PM
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
2023-09-14 02:28 PM
decoupling ...power supply ? for audio, 10u minimum close to chip, and 470uF elko somewhere.
2023-09-14 02:30 PM
..he write: decoupling , not coupling.
2023-09-14 02:51 PM
Thank you for the rectification. @AScha.3. It was careless mistake.
2023-09-15 09:52 AM
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.
2023-09-15 10:47 AM - edited 2023-09-15 11:04 AM
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 )
2023-09-19 10:05 AM
Awesome thanks for the info. This helps.