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Class D Switching Power Amplifiers and Power D/A conversion

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Old 12th May 2013, 08:16 AM   #291
akraj is offline akraj  Bangladesh
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Quote:
Originally Posted by stewin View Post
thanks akraj for the spirit of diy .

have you managed to test it?
PCB may come to hand by this week.
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Old 17th May 2013, 08:20 AM   #292
manojtm is offline manojtm  India
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Hi All,

AUD600 Rev1.1 with IRF540 MOSFET and Coilcraft filter, Supply rail +/-45V amazing power
i feel proud on AUD600 and it will give same power (my feel) on 45v supply no need 75V rail

Regards
MANOJ
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File Type: jpg AUD600 using coilcraf.jpg (769.0 KB, 716 views)
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Old 17th May 2013, 09:51 AM   #293
stewin is offline stewin  Kenya
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wow nice work. i am working on combining the main amp and protection in one board. i will use double sided board to reduce emi.
i will post the development later.
i will use irfb4227 as outputs.
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Old 17th May 2013, 10:04 AM   #294
akraj is offline akraj  Bangladesh
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Quote:
Originally Posted by manojtm View Post
Hi All,

AUD600 Rev1.1 with IRF540 MOSFET and Coilcraft filter, Supply rail +/-45V amazing power
i feel proud on AUD600 and it will give same power (my feel) on 45v supply no need 75V rail

Regards
MANOJ
Hi Manoj: how come coil can contribute for power outpost? I mean that huge difference? 45v and 75v is huge dirrerence.

What is the fsw?

Thanks
Raj
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Old 18th May 2013, 12:48 AM   #295
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Hi Manojtm
greetings #292 nice coilcraft filter any part no how does it compare to T157-2
filter nice work
warm regards
andrew lebon
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Old 20th May 2013, 07:09 AM   #296
manojtm is offline manojtm  India
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Quote:
What is the fsw?
Hi Raj,

using coilcraft filter with IC7404 fsw= 325KHz;IC 4069 fsw=205KHz and IC7414 fsw=110KHz
i want fsw=400KHz so i will change MOSFET IRF540 to other one
Quote:
I mean that huge difference? 45v and 75v is huge dirrerence
not actual watt, i said it was my feel

Regards
MANOJ
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Old 20th May 2013, 07:15 AM   #297
manojtm is offline manojtm  India
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Quote:
Hi Manojtm
greetings #292 nice coilcraft filter any part no how does it compare to T157-2
Hi andrew,

thanks. sound quality and power is good compare with T157-2 and very very low RF noise
Disadvantage is it will warm like 55/65 deg. temp with in 25 min. run and fsw will reduced to 280KHz(recheck again due to coil OR 74hc04)

can you tell me where i can get IRFP4227 MOSFET???

Regards
MANOJ

Last edited by manojtm; 20th May 2013 at 07:19 AM.
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Old 20th May 2013, 07:21 AM   #298
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Hi Manojtm
greetings thanks for replying
warm regards
andrew lebon
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Old 20th May 2013, 12:22 PM   #299
exflaco is offline exflaco  Armenia
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Please post the exec from pic thanks
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Old 23rd May 2013, 04:07 AM   #300
manojtm is offline manojtm  India
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Hi,

any one tested Fairchild FDP075N15A_F102 MOSFET

Regards
MANOJ
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