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Old 5th March 2013, 01:54 PM   #1
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Default Tekko builds a smaller version of the BIG class D

I started another project today, a smaller version of the BIG class D amp, the modulator will use a NE555 based triangular wave oscillator posted in another thread.

The output module: http://i.imgur.com/aW3V5jx.png

Output devices are two IRFP150 pulled from an old UPS and gate drive is a FAN7392.

For the output module board im testing out this iTead PCB prototyping service.


If this works out, i might think of selling the excess boards as i will get 10pcs.
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Old 13th March 2013, 10:29 PM   #2
PetruV is offline PetruV  Romania
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Do you have any simple ish class d designs which work at 90v
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Old 14th March 2013, 05:51 PM   #3
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There are plenty of such designs on the forum, just pick one.

I would prefer if noone built any of the "designs" i've posted.
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Old 14th March 2013, 07:49 PM   #4
UrSv is offline UrSv  Sweden
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Quote:
Originally Posted by Tekko View Post
I would prefer if noone built any of the "designs" i've posted.
And the boards you'd be selling what would the use be?
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Old 14th March 2013, 08:41 PM   #5
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As they are just straight power module boards, u could do anything u want for the frontend, clocked, delta sigma, UcD, Hysteresis. They do include the level shifting transistors, but if you wish to use other means of level shifting, just bridge them with jumpers.

I will know in about 4-5 weeks wethever the boards even work at all and what undiscovered errors i made.
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Old 15th March 2013, 06:39 PM   #6
PetruV is offline PetruV  Romania
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Quote:
Originally Posted by Tekko View Post
There are plenty of such designs on the forum, just pick one.

I would prefer if noone built any of the "designs" i've posted.
I ve been searching but i havent found any that are very special but i think im going to build the d200 from apex but i need pdf file
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Old 15th March 2013, 07:03 PM   #7
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Also when getting into class d, start small like a LM311 comparator and a TC4422 gate drive ic as an output stage, then as you gain knowlege u can scale it up.
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