dave wrote:

On 01/03/2014 07:33 PM, Phil Allison wrote:
"dave the pig ignorant autistic IDIOT"


The question was why is audio power spec is half that of DC on/off
capability.

** No it was not.


It is because the device stays on all the time and because the audio
waveform causes more heating.


** A maker's max dissipation spec for a semiconductor is not related to the
application.

It is only related to the device itself.

Normally, the figure given is for *ideal* operating conditions - like when
mounted on an infinite heatsink held at 20C.



.... Phil

Odd. I thought Maximum values were on the data sheet. Anyway, a MOSFET
used as a switch makes less heat so it can have a higher current rating
than one used class AB.


'Safe Operating Area' is more important than individual maximums.



--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.