How I reduce Tantal capacitor ESR ?

[elcielo]

capacitor esr in parallel

Can I reduce parallel connection ?

 

[arturt134]

tantal esr

Better, try to use low ESR caps.

 

[elcielo]

capacitor esr parallel

How I calculate parallel connection ESR ?

also, I use POSCAP(SANYO).

 

[arturt134]

how to reduce esr

I'm not sure - I've never do it. But I think, ESR is resistance, so you can calculate ESR as normal parallel conection of two resistances.

 

[misley]

esr capacitor parallel

Just as someone said above... You can try to paralell a few tant capacitors with lower capacity to decrease ESR and leave capacity (C=C1+C2+C3... & R=R1||R2||R3...)you need. What do you try to make? Rectifier, amplifier?

 

[elcielo]

how to reduce capacitor esr

I designed power supply using EL7566(intersil).

It is request low ESR capacitor.

I used POSCAP(sanyo).

But, I design using general Tantal capacitor to it.

 

[mrm]

impedance parallel capacitor esr

pay attention with ESR: apply thevenin theorem to the network made with two parallel branches each one made with a Cap and a series R: the real part of the equivalent impedance is the total ESR, the complex is the total cap.

 

[mkbtam]

esr parallel connected capacitor

I think the common practice in the industry is parallel connection but be careful of matching.

 

[VVV]

reduce esr

You parallel two or more capacitors. If the connections are short, you will lower the total ESR. The total ESR is calculated simply as the parallel equivalent of the individual ESR's.
This is easy to see in the case of equal caps with equal ESRs. You have two or more identical series RC networks, all in parallel. Since the R and the C portions are equal, the junction points (where the C and the R are connected together) will be at the same potential for all networks, since they are in parallel and the elements are identical. Since all those nodes are all at the same potential, you can short them together.
But when you short those points together, the C's are all in parallel and so are the R's. Therefore, the total capacitance is the sum of the individual capacitances and the total ESR is the individual EST divided by the number of caps in parallel.