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Old 30th April 2010, 04:44 AM   #1
larryB is offline larryB  Canada
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Default Rate/comment my power amp

Here is my attempt at making a power amp , I am better at making pcb than making drawings of circuits , I understand good layoud is very important and very short noding and far away noding from important areas .

This is to be used as +-15 v regulated transformer type power supply with outside battery.

Will be using op amp lm7322 for driving mosfets in bias mode , will be using probably the class d lateral mosfets .

Load is yet to be determined , much higher impedance than 8 ohm and not much current .

I await all of your comments with impatience

Regards , LarryB
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Old 30th April 2010, 08:09 AM   #2
Nrik is offline Nrik  Denmark
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Won't work. The output curve for the lower opamp is not shown in correct phase, and the current in the transformer will outbalance eachother leaving you with zero output, a hot transfromer if the MOSFETs survive it.

You should check out Eva's Zeus amp - looks a bit like this, is simpler, and can be made to work with good support in the forum.
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Old 30th April 2010, 09:00 AM   #3
ontoaba is offline ontoaba  Indonesia
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Hi Larry.
You creating another one, but this one better than before, good job. You need to learn about MOSFET driving. Download some mosfet datasheets and read all the Vgs graphs, it will helpful.
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Old 30th April 2010, 10:38 AM   #4
Mooly is offline Mooly  United Kingdom
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OK, this is never going to work in a million years... but don't let that put you off.

What sort of load are you trying to drive ?
Does it have to use an output transformer ?
Why the discrete phase splitter... it can all be done with those opamps.
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