How to feedback a Class D amplifier?

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paultwang

Joined Mar 8, 2006
80
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?
 

hgmjr

Joined Jan 28, 2005
9,029
Originally posted by paultwang@Apr 14 2006, 10:02 PM
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?
[post=16189]Quoted post[/post]​
Here is a fairly good article on "class d" amplifer theory.

Class "D" Amp Article

hgmjr
 

mozikluv

Joined Jan 22, 2004
1,437
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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