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Class D Switching Power Amplifiers and Power D/A conversion

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Old 26th March 2013, 02:29 AM   #291
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HI
what about short circute protection jlester87 ?
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Old 26th March 2013, 02:32 AM   #292
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No short circuit protect. Output mosfets, IC and to92 totem poles are very cheap
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Old 26th March 2013, 03:51 AM   #293
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Quote:
Originally Posted by jlester87 View Post
I've created a layout for this one.

I added trigger for protection circuit and added gate resistor diode.
Also adjusted some values for slightly higher than +-50V operation.
You can opt for the original values if you want it to run it for lower voltages.

I added the fuse so I can easily route the GND trace haha.
you already have it armed?: D

Last edited by SERGIODS; 26th March 2013 at 03:53 AM.
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Old 26th March 2013, 03:55 AM   #294
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Quote:
Originally Posted by jlester87 View Post
Here's my compact layout based on original schem by ejtagle.
redesign your work.
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Old 26th March 2013, 10:02 AM   #295
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Quote:
Originally Posted by SERGIODS View Post
redesign your work.
Why? any suggestions?
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Old 27th March 2013, 02:59 AM   #296
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Quote:
Originally Posted by stewin View Post

but after hearing the clarity of this amplifier i decided to use the original version which has been simulated by norazmi . here is my layout and artwork .
After reading through this entire thread I've decided to jump in and try to etch my own pcb. There are many different versions of this amp in this thread, but Stewin's layout and artwork look good. I do have a beginner question though. Most of the amps that people are building here are one sided but it looks like Stewin's pcb artwork is two-sided. Is that right?

Tom
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File Type: jpg Class D 200 Wrms with 2 mosfet pcb artwork.jpg (692.8 KB, 500 views)
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Old 27th March 2013, 03:08 AM   #297
norazmi is offline norazmi  Malaysia
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yea, stewin always like double sided board, compact is good
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Old 27th March 2013, 03:18 AM   #298
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Thanks Norazmi, I was thinking maybe I should start out with a single sided board first. Is there a good, one-sided pcb of this ultra simple class D amp that you would recommend ? I have all the parts and would love to build it.

Tom
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Old 27th March 2013, 03:30 AM   #299
norazmi is offline norazmi  Malaysia
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yes its ok for this design because its not so sensitive like ucd. your design seems good to go, but always double check for the component placement with right value. OCP is possible for this module and i`ll give it a try when i have time.

And yes i have one which im always made it because this amp is so cheap and hifi quality, give me your email and i`ll send it to you. you can go with your version and just match the value for the parts or else.
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Old 27th March 2013, 05:25 AM   #300
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Hi Norazmi,

Regarding short circuit protect, is it ok to short the U1B output to ground to stop the gate drive? Or is there a better implementation?
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File Type: png gate drive.PNG (43.6 KB, 445 views)
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