0
\$\begingroup\$

We are a design using 3 decoupling capacitors the value are 47 uF 16 V X5R, but we are having trouble with the supplier.

I have an idea to replace them with 1 capacitor 100 uF, 1 10 uF and 0.1 uF. This value is common to find them. Anyone has a better value to be replaced this 3 decoupling caps?

Thanks

\$\endgroup\$
  • 1
    \$\begingroup\$ Replace it with the same value (or nearby value) and or different dielectric, max voltage rating. Try to use the same 3 caps, or something like this will occur i.stack.imgur.com/DHSyV.png you can see the 3 different caps ( the solid line with 3 anti resonance peaks) is mostly worse than the dotted (3 same value caps line). If no-one answers this by tonight I will write better answer. For now: electronics.stackexchange.com/questions/320363/… \$\endgroup\$ – Remco Vink Dec 10 '18 at 16:15
0
\$\begingroup\$

Using different value capacitors filters different frequencies. So using different values for decoupling generally better. Basicly, bigger capacitors filters low frequencies, smaller capacitors filters high frequencies. Your values looks OK. I think there is no problem, but to be sure i need to see schematic.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.