Resonant capacitor for LLC converter

[cupoftea]

Hi,
We wish to use 5 ECWHA3C223 (22nF) film capacitors in parallel as a resonant capacitance in an LLC converter.
The total current is 6Arms (100kHz sine) and voltage is +/-110V again sine 100kHz.

ECWHA3C223 22nF capacitor

https://industrial.panasonic.com/cdbs/www-data/pdf/RDI0000/ABD0000C187.pdf

Do you think it'll be ok?...i dont see an actual ripple current rating in the datasheet.

 

[byjuncal]

Why you are not using MLCC NP0?

 

[Easy peasy]

keep reading the data sheet - it has all the information required to determine sensible current ratings, voltage ratings etc ...

 

[FvM]

keep reading the data sheet - it has all the information required to determine sensible current ratings, voltage ratings etc ...

Learn how to locate the correct technical information at manufacture site. Link in post #1 is a general data sheet, there's also specific data for the respective capacitor series. https://industrial.panasonic.com/cdbs/www-data/pdf/RDI0000/ABD0000COS44.pdf

 

[Easy peasy]

For starters, 5 x 22nF = 110nF, @ 100kHz = 14.5 ohm, x 6A total = 87 Vrms = 123Vp.

--- Updated Apr 4, 2022 ---

D.F. = dissipation factor, Vrms * Irms * DF = watts ...

for a small cap, say 1-2cm^3, 300mW is about tops - unless you are direct force cooling ...

 

[cupoftea]

For starters, 5 x 22nF = 110nF, @ 100kHz = 14.5 ohm, x 6A total = 87 Vrms = 123Vp.
--- Updated Today at 10:34 AM ---

D.F. = dissipation factor, Vrms * Irms * DF = watts ...

for a small cap, say 1-2cm^3, 300mW is about tops - unless you are direct force cooling ...

Thanks, from datasheet kindly supplied by FvM, i see DF = 0.1% at 100kHz for the 22nF.
So from your kindly given equation i am getting 87 * 1.2 * 0.001 = 100mW per cap.
This seems to be OK.

 

[Easy peasy]

The DF was in the data sheet posted in the 1st instance too - just needed a close look - be careful that caps are suitably de-rated for voltage - if you want them to last...

--- Updated Apr 4, 2022 ---

Which - at 1600V part - you appear to have done ...