Class D Amp with LM566, LM393 and 2XIRF530

[thienchay]

Nice work, but there is mistake.

Oh , that my mistake thanks you so much for checking .
I've edited .
Regards .

 

[DC sound]

Oh , that my mistake thanks you so much for checking .
I've edited .
Regards .

hello thienchay..
great job!! I would like to ask..
what the rail voltage for 2 Ohms, 4 Ohms & 8 ohms?
what mosfet use?
what value of filter inductors?
how many watt in 2ohms, 4ohms & 8ohms?

hope to hear you soon... thanks for the lay-out..

 

[thienchay]

the Zobel resistor located on the 0.22 ohm resistor like this pic

 

[thienchay]

hello thienchay..
great job!! I would like to ask..
what the rail voltage for 2 Ohms, 4 Ohms & 8 ohms?
what mosfet use?
what value of filter inductors?
how many watt in 2ohms, 4ohms & 8ohms?

hope to hear you soon... thanks for the lay-out..

hihi , i'm not yet try it the value of filter inductors is around 22uH -> 47uH for 2 ohm -> 8 ohm load .
you can rail around +/-55V -> 65V for 2 ohm load (i think it can work with +/-75V) , i have IRFP450, IRFP460 so i'll use it . You can use another MOSFET with the same datasheet .
Regards

 

[DC sound]

hihi , i'm not yet try it the value of filter inductors is around 22uH -> 47uH for 2 ohm -> 8 ohm load .
you can rail around +/-55V -> 65V for 2 ohm load (i think it can work with +/-75V) , i have IRFP450, IRFP460 so i'll use it . You can use another MOSFET with the same datasheet .
Regards

thanks thienchay!!
nice to hear you.. I have IRFP460 on hands.. so then I will use those mosfet..

 

[apexaudio]

Oh , that my mistake thanks you so much for checking .
I've edited .
Regards .

Use BD241C or TIP31C... instead IRF640 in 12V bias circuit.

 

[thienchay]

Use BD241C or TIP31C... instead IRF640 in 12V bias circuit.

ok sir
Thanks a lot

 

[ravslanka]

hi thienchay

how about adding limiter and clipping indicator on board

thanks

ravs

 

[ravslanka]

hi apex

can i use this limiter in your class d amp

thank you

regards

ravs..........

 

[apexaudio]

hi apex

can i use this limiter in your class d amp

thank you

regards

ravs..........

Yes this limiter will be ok,
Regards

 

[thienchay]

Hi Apex
Are you propose what speaker protection for this amp ?

 

[apexaudio]

Hi Apex
Are you propose what speaker protection for this amp ?

Use 'speaker terminal' DC protect with triac from SR200 thread

 

[arasuk]

Hi thienchay,

Nice PCB, Thanks
Is't IRFp460 Qg (210Nc) quite high for 2 pairs O/P, even for 200 - 250Khz.


Mr.Mile I still have the same problem, now I have 17.5v Dc on the O/P ,, will look at any other fault in the PCB.

I will make thienchay PCB and Build the amp.

regards

 

[DC sound]

ok sir
Thanks a lot

hello ravslanka,,

what kind of core for inductors you use?

 

[DC sound]

Hi Apex..\ Thienchay..

I'm Planning to build this amps that lay-out from thienchay..
before make this project I want to make things clear as my project plan..
I will use +/-63v my target load is 4ohms.. I will use inductors coil from Coilcraft VER2923-223KL
http://ph.element14.com/coilcraft/ver2923-223kl/inductor-pwr-22uh-26a-0-1-12-2mhz/dp/2289007
kindly check my attach photo..

 

[DC sound]

Hi Apex..\ Thienchay..

I'm Planning to build this amps that lay-out from thienchay..
before make this project I want to make things clear as my project plan..
I will use +/-63v my target load is 4ohms.. I will use inductors coil from Coilcraft VER2923-223KL
VER2923-223KL - COILCRAFT - INDUCTOR, PWR, 22UH,26A,0.1, 12 | element14 Philippines
kindly check my attach photo..

 

[ravslanka]

hello ravslanka,,

what kind of core for inductors you use?

hi dc sound

this board is not mine.thats a u core salvaged from
flyback eht of monitor.

regards

ravs.....

 

[KidDamn]

Hi, Thien Vegetarian
You can send your Sprint Layout original file for me?
my email: uidanoob@gmail.com
Thank you

 

[DC sound]

Hi Thienchay/ Apex,

the caps 100uf/100v in the positive rail is wrong polarity.

here's my PCB of Apex turbo.. kindli check for any error..

 

[thienchay]

Hi Thienchay/ Apex,

the caps 100uf/100v in the positive rail is wrong polarity.

here's my PCB of Apex turbo.. kindli check for any error..

yeah , you are right . that my mistake , so sorry , the capacitor in your redraw pictures is right , my original is wrong , thanks for check
Regards