LM7815 capacitor value

vinu gopalakrishnan · Mar 6, 2013

Hey friends,..Can i use 470nf in place of the 330nf capacitor in this circuit???
Please tell me what is the use of these capacitors..

amayilsamy · Mar 6, 2013

Input capacitors is to reduce the ripple voltage amplitude seen at the input
of the module.

As the output voltage is sensed across both the filter and load impedance,

The impedance of the output capacitance affects the damping of the output filter and has a major affect on
the transient response of the supply.

https://www.ti.com/lit/an/slta055/slta055.pdf

I hope this will helps you..

vinu gopalakrishnan · Mar 7, 2013

so small ceramic capacitors will be enough ,right?

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so small ceramic capacitors will be enough ,right?

amayilsamy · Mar 7, 2013

We can use both capacitors like aluminium ,ceramic capacitors .

Ceramic capacitors with high stability and low losses for resonant circuit application.

vinu gopalakrishnan · Mar 9, 2013

What happens if i use 470nf in place of 330nf? Any problems?

Nick_F · Mar 9, 2013

You can use larger value capacitors without any problems, so it's totally acceptable to use a 470nF instead of 330nF.

vinu gopalakrishnan · Mar 9, 2013

Anybody please tell me what is this ceramic capacitor value, its written .047 AEC??

Nick_F · Mar 9, 2013

That's a 0.047uF (microfarad) or 47nF.

LM7815 capacitor value

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