For a bi-polar D class amp ( 2 n-channel mosfets) being powered from +38V and -38V what would be the ball-park maximum instantaneous and continuous RMS wattage driving into 8 ohms and not demanding THD requirements and only
40Hz to 18KHz handling.?
Class D audio amp power rating
Jun 22, 2007
2 Replies
40Hz to 18KHz handling.?
At the 40Hz end, you can have a huge THD and get nearly a 38V peak square wave. Ignoring the drop in the output devices:
P = 38^2 / 8 = 180W RMS
For a not very distorted signal it will be
180W / sqrt(2) = 127W+38V
continuous
only
Thanks for that. What would it be for say 10 percent THD
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