Hmm...  I have a sample here of a National LM4651/LM4652 pair.  You could
low-pass filter your PWM output, then this pair (170W audio subwoofer amp)
will happily convert it back to PWM and drive the load for you...  8-)

Dale
(BTW, anyone know a good source of transformers?  I could use a 20V/6A or
so for when I get around to using this!)
--
"Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only the cat died nobly."
          - Arnold Edinborough

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