Cheap simple class D amp circuit to build.

[Aucosticraft]

What are the dimensions of the board?

 

[norazmi]

11cm x 6cm for the dimension

 

[portreathbeach]

How does this amp sound when using full range speakers?

 

[stewin]

hi nozrami kindly post the schematic you are using.

 

[SAEED JOON]

please post the schematic of this pcb design
how this amp work? i mean its good or ... heeey u know
i tried some simple d-class amp also this chip-d-class in the post (i can post my nice pcb)
but NO ONE works good😕
what about this one?

 

[marce]

Looking at the layout I would suggest not, it is not a very good layout for class D and layout for class D like SMPS's is critical

 

[stewin]

guys may be we should try the below before replies are made


http://www.diyaudio.com/forums/class-d/182900-class-d-amp-lm566-lm393-2xirf530-10.html#post3171297

diysmps
🙂 🙂

 

[Hadighorbani]

what about this one?

hi
what about output self?
core?
turn?
and ,,,?

 

[stewin]

hi all another cheap solution to go about it . thanks to detex audio

 

[PetruV]

i heard a lot of posts around the detex amp,but i may never know if it works,i am very curious.
i have heard about 70a mosfets at 100v with 14 miliohms which should be suitable since they are complementary ones,this way operation in 2 or 1 ohms is possible.
i am looking to build it with smps for 45v

 

[panos1]

hi guys..
i am going to make the this amp....
but instead of irf540 i want to use irf640 because i want to increase voltage in order to get more power....
if i use irf640 instead of irf540 what mosfet can i use instead of irf9540?

 

[richie00boy]

IRF9640

But I suggest you build it as it is supposed to be and get it working before you mess around.

 

[panos1]

richie than you for your reply...
yes i will make the nececcery changes..
i wiil change capacitors to 1μf and the 2k resistor to 1k...

 

[richie00boy]

I don't think that's right.

 

[stewin]

like the http://www.diyaudio.com/forums/class-d/205654-ultra-simple-class-d.html?highlight=ultra+simple+class it is not simple to just add voltage directly without modifying the circuit. fortunately fredos managed to do +/-90vlts in his damp 1200wts using irfp240&irfp9240

 

[stewin]

http://www.diyaudio.com/forums/class-d/240510-diy-good-class-d-amplifier.html

another simple high power d topology

 

[Hyper2283]

Some Problems after 60% volume

Hello everyone,

I just made this class D pcb, and it's work, but until 60% of input volume. After that the sound is very bad, and on scope the pwm dissapear. Distorsions are very high. I tried all kind of core including t106-26 and t106-2 (red one from micormetal), at 35uH, and same result. I used LM393 N. Vere is the problem?
+-35 volt, Rss 500R/1w, zenners at 1W, and I switch irf540/9540 with irf640/irf9640 with same result.

Maybe LM393 N is resposible for that. Should I use LM393AP witch is faster???

 

[STAGE4]

d class

 

[STAGE4]

d class

 

[Hyper2283]

Same problem

Hello everyone,

I just made this class D pcb, and it's work, but until 60% of input volume. After that the sound is very bad, and on scope the pwm dissapear. Distorsions are very high. I tried all kind of core including t106-26 and t106-2 (red one from micormetal), at 35uH, and same result. I used LM393 N. Vere is the problem?
+-35 volt, Rss 500R/1w, zenners at 1W, and I switch irf540/9540 with irf640/irf9640 with same result.

Maybe LM393 N is resposible for that. Should I use LM393AP witch is faster???

Anyone, any sugestions? I swith to LM393AP(faster than lm393n) with same result. Amp work very well until 60% input, and after that, the speaker cracking. I cant identify the problem.
Here's the scope video...https://www.dropbox.com/s/0ve1bfuajom50ps/VIDEO0016.mp4?dl=0