Ultra Simple Class D

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aspringv

Member
Joined 2010
Paid Member
Appropriate inductors

Hi All,

I've gotten quite intrigued by this thread - I've never built a class D amp and this seems like a pretty good way to learn about them.

I've started collecting components, but I don't adequately understand the requirements of the inductor.

Firstly - which is better getting a torroid of some description or a 'EE' style inductor and introducing an air gap by some means.

Secondly - what core color for a torroid is best? I don't understand what the color denotes, but I assume that it means the core materiel is different. I have no understanding of the differing materiels and their effects, and what is best. I'll be sourcing the torroids off ebay, so knowing what I should be looking for would help! Or can I just buy a particular inductance and current rating and go from there?

Cheers for any help folks!
 
H

Hadighorbani

Member
Joined 2010
stewin
dear friend
your amp is so cool and so simple
this amp have good sound
this amp is best for my car
but it have a big vicnes
if output short then output mosfet was damage in afue micro secent
it realy need protection circut
this amp is compelet when have a good protection for protect it.
sory for my bad
you are one of the best my friend in net.
thanks for all thing you do for me and this good site.
 
T

TargetAmplificadores

Member
Joined 2011
Hadighorbani said:
guys
this amp not usefull without overcurent protection
how can i make a protection for it?
Click to expand...

i have this circuit, that used in various amplifiers Class D, these circuit work with 200V from supply, but i have calculate the values from your necessity.

i hope thats this help you
 

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A

abarth92

Member
Joined 2011
Hi Hadighorbani, you can try this protection that has anti-bump and then controls the output in the speaker in case there is a DC voltage caused by the mosfet, the relay will trip and save the speakers from fault.

This circuit come from a magazine of electronics and this circuit is tested.
 

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S

stewin

Member
Joined 2007
Hadighorbani said:
stewin
dear friend
your amp is so cool and so simple
this amp have good sound
this amp is best for my car
but it have a big vicnes
if output short then output mosfet was damage in afue micro secent
it realy need protection circut
this amp is compelet when have a good protection for protect it.
sory for my bad
you are one of the best my friend in net.
thanks for all thing you do for me and this good site.
Click to expand...

also try this link diysmps
 
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