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Class D Switching Power Amplifiers and Power D/A conversion

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Old 16th April 2008, 11:02 PM   #11
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Quote:
Originally posted by darkfenriz
I've got only top and bottom in "light" edition
Unless they changed something...you have TRestrict in Light (layer 41). The polygon feature is there, too. Light only restricts you to two signal layers - you can have as many mechanical layers as you want!
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Old 17th April 2008, 08:53 PM   #12
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May we see the EAGLE files please?

Having the EAGLE files will allow us to have a better understanding of the layout.

Thanks,

vb
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Old 18th April 2008, 07:22 AM   #13
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ok
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Old 18th April 2008, 03:13 PM   #14
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Started experimenting a little bit...
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Old 18th April 2008, 03:14 PM   #15
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continued
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Old 18th April 2008, 03:21 PM   #16
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Waveforms after dead time generator (ir2110 inputs) driven by low level sine. Dead time set to maximum, around 120ns.
Little overshooting and jittery, but still with nice slopes, so I don't think it is much a problem.

Regards
Adam
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Old 18th April 2008, 04:57 PM   #17
Eva is offline Eva  Spain
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Remember that a good old 100Mhz CRT analog oscilloscope will tell you more truth about class D switching waveforms...
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Old 20th April 2008, 07:22 AM   #18
zilog is offline zilog  Sweden
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Quote:
Originally posted by Eva
Remember that a good old 100Mhz CRT analog oscilloscope will tell you more truth about class D switching waveforms...
I have thought about upgrading myself to some kind of DSO, what are the pros and cons when it comes to class d and smps?
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Old 20th April 2008, 08:04 AM   #19
Pafi is offline Pafi  Hungary
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darkfenriz!

It's not about PCB, but why do you use 2 RC delay network and 2 potentiometers?
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Old 20th April 2008, 10:08 AM   #20
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I was not sure about symmetry of the dead time, so I can adjust it separately for high side and low side dead time.
Probably I was over-worried about that, one RC should be OK.

Regards
Adam

P.S. another issue is I had six inverters in one package, so why not?
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