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Old 24th April 2011, 04:00 PM   #991
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Anyone ever used this amp for full range systems?

It's what I'm thinking of riding in small boxes active woofer with 12" and titanium driver

behaves in the order of 1KHz.. 5Khz..10Khz ..? good or bad?

in the case would mount a 400W into 8 ohms

Thanks
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Old 24th April 2011, 04:33 PM   #992
authlxl is offline authlxl  China
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Default 2000W/4ohm rms power UCD class D SMPS inteagrated

Quote:
Originally Posted by NMOS View Post
please check this russian UCD Bridge AMP

there is after LM311 a Quadruple 2-Input Positive-NAND Gates SN74AC00D IC for Phase invert....and rest of schematic looks like ours

is this a better solution for bridging with less devices and lower component count ?

have not so much experience
It is good circuit indeed ,we have developed some amp like this circuit,the concept same circuit not ,works well,powerful and stable,it is not perfect choose to select IRS2110 as driver,it is so hard to proper control the DT time.

2000W-4000W/40hm range behave uncommon.

Prototype pics below:
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File Type: jpg DSCF0606800600.JPG (127.2 KB, 1176 views)

Last edited by authlxl; 24th April 2011 at 04:45 PM.
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Old 24th April 2011, 04:39 PM   #993
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We found output inductor a bit heat when continuous 1Khz sine wave signal added.output mosfet heat also,we have to revised it once again.test and burn-in good now,last pics below:
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Old 24th April 2011, 04:42 PM   #994
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Quote:
Originally Posted by authlxl View Post
We found output inductor a bit heat when continuous 1Khz sine wave signal added.output mosfet heat also,we have to revised it once again.test and burn-in good now,last pics below:
Any datasheets?

Prices?

Dimentions
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Old 24th April 2011, 05:17 PM   #995
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Quote:
Originally Posted by authlxl View Post
We found output inductor a bit heat when continuous 1Khz sine wave signal added.output mosfet heat also,we have to revised it once again.test and burn-in good now,last pics below:
Nice amp

How did you solve the heat? or What was the problem??

regards!
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Old 25th April 2011, 12:58 AM   #996
authlxl is offline authlxl  China
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it is simple,we use 2pcs T130 coil in our inductor, heat down.For mosfet increase the drive voltage about 18Vdc should good method
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Old 25th April 2011, 04:30 AM   #997
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Quote:
Originally Posted by authlxl View Post
,it is not perfect choose to select IRS2110 as driver,it is so hard to proper control the DT time.

2000W-4000W/40hm range behave uncommon.

Prototype pics below:
which IC do you prefer for IR2110 replacement
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Old 25th April 2011, 02:27 PM   #998
authlxl is offline authlxl  China
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Quote:
Originally Posted by NMOS View Post
which IC do you prefer for IR2110 replacement

Two methodsne is IR series DT control Floating Driver(irs20124/irs2092/irs20955 etc.),the other is high speed optocupler + mosfet diver+mosfet body diode unavailable circuit +RC delay circuit.

It is only ourselves experiences,maybe friends have good methods on it.
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Old 25th April 2011, 04:24 PM   #999
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Quote:
Originally Posted by electroconico View Post
Gate signal is closest to mosfet.
Power supply line is direct on mosfet pins.
Capacitors are closest to Drain and Source pins.

What do you think about this new pcb routing?

Is there anything to change ?

Ill apreciate your comments and tips.

ty
regards!

P.D. Ill add some test points to pcb.
PCB seems nice. C9 is not necessary, instead increase C6 to 1u ceramic. Then you can make gate drive path shorter.
What does the opocoupler do? Only MUTE function?
Use the normal connection of the comparator. I reccomend to redesign the input to be balanced. Then the 47k trimmer is not necessary, (if you decresease R5 to 10k then the offset is also smaller, or put a series capacitor with R2 to ground)
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Old 25th April 2011, 04:27 PM   #1000
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Quote:
Originally Posted by Rafael S. M. View Post
Anyone ever used this amp for full range systems?

It's what I'm thinking of riding in small boxes active woofer with 12" and titanium driver

behaves in the order of 1KHz.. 5Khz..10Khz ..? good or bad?

in the case would mount a 400W into 8 ohms

Thanks
This weekend I made an amp with this (with modifications) for sound reinforcement in a church. It is very nice. The 250W @ 4 Ohm amp, with SMPS, and preamplifier with into a 20x10x6 cm box.

I reccomend you do biamping. It is much safer for the tweeter, and you can even push it much harder.
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