My class D amp

Jump to Latest
#101
manojtm said:
My AUD600 Rev3.0 is suitable for any type of filter core like T106-2,ETD,EE & EI core with gap and supply voltage range will support like +/-35V to +/-85V and IRFP250N will support fsw up to @500KHz range with cool.my only problem was HF little low (using ETD,EE,EI with gap)compare to LOW and MID,but it is satisfactory.I am not started the PCB yet.

Regards
MANOJ
Click to expand...

Hi Manoj,

This sounds very promising...guess I'll have to wait for rev. 3.0 then, but please let us know if it will be shared for DIY'ers in the forum.😉

Thank You!
🙂
 
#102
Hi ALL,

My AUD600 Rev 1.1 change to Rev 3.0
First test fsw @460KHz with IRFP250 MOSFET run cool with Mid Volume temp 50 deg. with full drive @ 4 Ohms load.🙂🙂

Regards
MANOJ
 

Attachments

  • AUD600Rev1.1change2Rev3.0-2 copy.jpg
    AUD600Rev1.1change2Rev3.0-2 copy.jpg
    833 KB · Views: 1,949
  • AUD600Rev1.1Change2Rev3.0-3.jpg
    AUD600Rev1.1Change2Rev3.0-3.jpg
    687.4 KB · Views: 1,778
  • AUD600Rev1.1 IRFP250 small H.sink copy.jpg
    AUD600Rev1.1 IRFP250 small H.sink copy.jpg
    696.2 KB · Views: 1,632
  • AUD600 fsw copy.jpg
    AUD600 fsw copy.jpg
    746.5 KB · Views: 1,438
#105
Nice work Manoj..

what is the main difference with your prevision designs ?
if it's possible , please give schematic to me. i'm working lots of month on class-d , still don't find a reliable design to improve and pcb designing.

Regards
 
#107
Hi Manoj,
use accurate LCR meter to measure the value of your inductor. maybe your ee type filters don't have enough inductance to reach a good cut-off freq. also as i calculated before , in lower loads , we lost some higher frequency and we should increase cut-off freq.
Click to expand...

Hi IR,

Thanks. I changed cut-off freq. settings ; add a 474/400v capacitor now HF is good.

Regards
MANOJ
 
You must log in or register to reply here.
Top Bottom