Electrolytic capacitors versus ceramic capacitor

[Gaber Mohamed Boraey]

Hello every

I’m trying to use this circuit for SG3225 ic testing

Can I replace the ceramic capacitor 33 uf with electrolytic capacitor?, if so how connect positive and negative terminals?

Also the 100uf?

Regards

 

[betwixt]

Look at the data sheet.
It clearly shows the capacitor on pin 8 is polarized (= electrolytic) and the one on pin 15 is 100nF although adding 100uF electrolytic across it wont hurt. Both have negative side to ground.

Brian.

 

[Gaber Mohamed Boraey]

okay, thank you brian , you are right

 

[danadakk]

I would compare, at 40 Khz, the ESR values of the two capacitor technologies,
and substitute on that basis as well. Do a test bed and try them as well, monitoring
their respective pin voltages with scope.


Regards, Dana.

 

[Gaber Mohamed Boraey]

I would compare, at 40 Khz, the ESR values of the two capacitor technologies,
and substitute on that basis as well. Do a test bed and try them as well, monitoring
their respective pin voltages with scope.


Regards, Dana.

I don’t understand your point of view
Sorry

 

[danadakk]

Capacitor esr comparison :

The lower the ESR the more effective it is as a bypass cap to suppress noise
and stabilize V at a node.

 

[betwixt]

ESR on the supply capacitor is important and some bulk capacitance is needed as well as a ceramic cap but the 33uF is only to provide soft start so its properties are not that important.

Brian.