Audio LP filter

Archived from groups: rec.audio.pro (More info?)

"David Grant" <NO_SPAM_PLEASE_jmd_2003@msn.com> wrote:

>I require a .47uF capacitor rated at 100V for use in a LC filter at the
>output stage of a class D power amp. I'm assuming this capacitor needs to be
>bipolar, but most bipolar caps don't seem to be rated past 50V for this
>capacitance. Is there anything wrong with using two 50V 1uF caps in series
>instead?

The LC filter of a class D power amp has to deal with high frequency
currents so you need a condensor suited for that application. Most
likely you need a condensor with specified loss factor apart from
capacitance, voltage, and temperatur range.

There is some chance that connecting two 1 uF in series will work -
sort of, but the amp may emit more high frequency hash than specified
or it may run hotter than normal.

Norbert