How to feedback a Class D amplifier?

Discussion in 'The Projects Forum' started by paultwang, Apr 14, 2006.

  1. paultwang

    Thread Starter Well-Known Member

    Mar 8, 2006
    80
    0
    For a Class D PWM audio amplifier (differential stage and power stage), what is the easiest feedback scheme?

    Since the output of the power stage is a modulated pulse waveform, where should I feed this into?
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Here is a fairly good article on "class d" amplifer theory.

    Class "D" Amp Article

    hgmjr
     
  3. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    hi paul,

    you didn't post the schem of your class D amp, however it is usually done this way. am posting this 2w class D amp i have designed way back. just take note how the neg. fdbk is connected.

    moz
     
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