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Old 28th January 2006, 02:25 PM   #1
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Lightbulb IC version of UCD

How can i improve this amp, can i use IR2110 in place of 2011 ?. The present schematic simulates well, but how will this be in real life ?.

I have attached the schematic in LTSPICE format.

- Anantha
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Old 28th January 2006, 04:51 PM   #2
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I'm afraid but you failed to attach the schematic.
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Old 29th January 2006, 01:24 AM   #3
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Sorry, the attachment was lost, here i am reposting it
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File Type: zip pwm_amp_comp2.zip (3.8 KB, 1357 views)
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Old 29th January 2006, 03:04 AM   #4
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And the schematic
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File Type: jpg pwm_amp_comp2.jpg (40.1 KB, 3654 views)
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Old 29th January 2006, 09:54 AM   #5
SSassen is offline SSassen  Netherlands
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Hmm, it looks like everybody is using my schematics and ideas these days, so for what it is worth I suggest you try something original, as really what is new about this?

Best regards,

Sander Sassen
http://www.hardwareanalysis.com
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Old 29th January 2006, 06:34 PM   #6
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You are getting famous Sander

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Old 29th January 2006, 11:32 PM   #7
kartino is offline kartino  Indonesia
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Hi Sander,

Today, If someone don't know UcD schematic, and they find and N-Fets and some transistors,and they create and self oscillatings class-d, then the result of course an UcD.

If someone don't know your schematic, and they find and N-Fets and Op Amp, and mosfet driver,and they create and self oscillatings class-d, then the result of course like yours.

The point is thanks to the people to the brilliant concept. They tell us the concept then suddenly we make lots of clones!
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Old 30th January 2006, 12:26 AM   #8
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Good point Kartino.

Additionaly it is such a solide and simple concept that it's virtually ideal for people to begin experimenting with, who may not have the money to buy the real thing or perhaps just want to try and learn what it's all about.

If that's the case it's absolutely the best to start with a proven concept.

That said, Anantha, start doing some research, build it, listen to it, try and find where it's deficiencies lie and then work on improving it. All you've got there is a very preliminary simulation, and still have a long way to go.

The kind of question you asked shows a lack of effort on your part, dig up the gate drivers respective data sheets, compare their specs, and make yourself an informed decision as to which would work best and then make it happen.

Regards,
Chris
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Old 30th January 2006, 03:07 AM   #9
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Thanks everybody, special thanks to SSassen i followed his thread to identify the comparator with logic outputs (LT1016) and
any way these gate drivers are same as in the IRAUDIO1 amplifier. I have no time now to construct this amp, probably will start from next week.
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Old 30th January 2006, 02:37 PM   #10
zilog is offline zilog  Sweden
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Quote:
Originally posted by anant_narayan
Thanks everybody, special thanks to SSassen i followed his thread to identify the comparator with logic outputs (LT1016) and
any way these gate drivers are same as in the IRAUDIO1 amplifier. I have no time now to construct this amp, probably will start from next week.

Depending on your rail voltage levels, you will run into problems with the comparator (the ideal gain of UcD lies somewhere around 4.5), and you will therefore quite early hit the maximum/minimum input voltage for the 1016-inputs.
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