biswaIITH
Full Member level 4
![Full Member level 4](/styles/images/ranks/flevel1.gif)
Hello All,
Currently working on a Synchronous Buck Converter
Vi= (40-60) V
Vo=14 V
Io=30A
Fs=130Khz
I have calculated the input capacitor rms current rating .to be around 14.5A.
I don't want to use only Electrolytic Cap(100V El Cap) as it will increase the BOM cost to put 4 or 5 of them to meet current requirement
I am planning to use a combination of both ceramic as well as Electrolytic capacitor..5 Ceramic capacitors with required ripple current rating(2.5 A each) + 1 Electrolytic Capacitor(~200uF & 2.5 A).
Will the ripple current rating by Ceramic cap Varry from its datasheet value due to any external conditions other than temp??
Currently working on a Synchronous Buck Converter
Vi= (40-60) V
Vo=14 V
Io=30A
Fs=130Khz
I have calculated the input capacitor rms current rating .to be around 14.5A.
I don't want to use only Electrolytic Cap(100V El Cap) as it will increase the BOM cost to put 4 or 5 of them to meet current requirement
I am planning to use a combination of both ceramic as well as Electrolytic capacitor..5 Ceramic capacitors with required ripple current rating(2.5 A each) + 1 Electrolytic Capacitor(~200uF & 2.5 A).
Will the ripple current rating by Ceramic cap Varry from its datasheet value due to any external conditions other than temp??