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Class D Switching Power Amplifiers and Power D/A conversion

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Old 19th November 2009, 12:44 AM   #21
sexya is offline sexya  India
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hii the pcb loookks yummy, could you email that file i also have the same chips ,but not enough time to dot he pcb,i dont know how much space is there in that 470 on output side but some time wiht a 8ohms for lower low limit like 1000ufd or 2200ufd calulate f=root of ( 2* 22/7 * R* C) where r is speaker and c is caps and f is the frequency wanted,
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Old 19th November 2009, 05:16 PM   #22
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I will make the board now and test it if it works good. If it does work good I send you the pcb layout file.

Regards,

Simon H.A.
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Old 19th November 2009, 09:10 PM   #23
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Update on the board.
It works perfectly, no clicking and hizzing sound on high volume, no noise at all when not playing. It plays very loud of such a little chip.
I took some pictures of the board.

Regards,

Simon H.A.
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Old 20th November 2009, 03:41 PM   #24
sexya is offline sexya  India
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Quote:
Originally Posted by Cyberzim View Post
Update on the board.
It works perfectly, no clicking and hizzing sound on high volume, no noise at all when not playing. It plays very loud of such a little chip.
I took some pictures of the board.

Regards,

Simon H.A.
hiii
hows the amp working, does it feel like 15 + 15 or if you bridge it does it fell like 30W ... i m waiting for the pcb
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Old 20th November 2009, 04:56 PM   #25
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the amp works great. I feel it's really putting some power out. At my school we used it for music and it got good bass and can play our whole classroom up with loud music, and that is only one channel.
I haven't tried it in bridged mode yet, I just need to be sure of how you do it. Isn't it where you use a opamp to make an inverted and non-inverted input for each channel?

Regards,

Simon H.A.
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Old 21st November 2009, 12:19 AM   #26
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Quote:
Originally Posted by Cyberzim View Post
Isn't it where you use a opamp to make an inverted and non-inverted input for each channel?
Basically, yes. Take a look at the link below for a circuit and good description.....

Bridging Adapter For Power Amps

I used a DRV134, but a good FET input opamp probably would have been a better choice.
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Old 21st November 2009, 01:15 AM   #27
Eva is offline Eva  Spain
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Nice layout!
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I use to feel like the small child in The Emperor's New Clothes tale
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Old 21st November 2009, 01:56 AM   #28
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Nice layout!
It almost looks like I knew what I was doing huh? I can assure you I really don't have a clue.

My understanding of electronics is very rudimentary (at best). I would compare it to how a young child can talk, but doesn't really understand how language works.
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Old 22nd November 2009, 02:30 PM   #29
sexya is offline sexya  India
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hey how about sharring the pcb file...looks cool
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Old 24th November 2009, 11:04 AM   #30
81bas is offline 81bas  Germany
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Nice layout!
Yeah, groundplane = nice layout
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