Sir,
i can't give any schematics without protection on open forum. many of them watching and downloading without any effort. I will give only those who are hardly trying/making the subject.
PM there is no attaching icon so pls provide it
Regards
MANOJ
manojtm , you still made no distorsion tests🙁 , it seems no one it is willing to make the effort, so i ask you to make it since you want it from others...😉
Thank for the reply Manoj. You could give me a proper full bridge amp schematic? I have very large speakers and is very hard to drive them, even with my 600w/8ohm amplifier.
ocp feedback
Hi
greetings how does OCP work in detex audio amp the one with LM311 NE555 and 10K preset i mean is it effective and working good feedback needed
warm regards
andrew lebon
Hi
greetings how does OCP work in detex audio amp the one with LM311 NE555 and 10K preset i mean is it effective and working good feedback needed
warm regards
andrew lebon
Hi CPX
my old design test result was i feel bad (THD 2.5%@mid level).I dn't check new design
i will post you shortly.
Regards
MANOJ
my old design test result was i feel bad (THD 2.5%@mid level).I dn't check new design
i will post you shortly.
Regards
MANOJ
??? I haven't check everything, but that part is correct. I have no idea what do you think to be wrong.
MANOJ,
Use my testing methodology to be able to compare results.
2.5% is normal for clipping only🙁.
Use my testing methodology to be able to compare results.
2.5% is normal for clipping only🙁.
Pafi, maybe you can help me with a better amp? I don't need protection scheme or something else, only a good and tested full bridge desing with ir2110/2113. Thanks.
Not mine. red_zone003 asked. And he asked a good and tested design. Did you test it?
stewin!
FDP2532, it's on the schematic. In my first bridged amp I used 8 pcs of FDP2552 (2552 is the half of a 2532), and it worked on 2 ohms, so there is a chance.
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thanks paffi .
i have seen FDP2552 datasheet it is similar to irf540n. meaning at +/- 40vlts with bjt buffer irf540n can used eight pieces per channel at bridge mode with a 2ohms load... please correct me if i am wrong.
>>>>can i take my chances with 8 pieces irfp250n per channel using output buffer at +/-75vlts?
>>>>if it cannot work how many pieces of irfb4227 do i need per channel to make it work full bridge +/- 85vlts 2ohms of course with a bjt buffer to parallel the output fets?
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Calculate maximum needed peak current, add at least 30% for safety and divide it to 100 degrees current of each mosfet.
In this case:75 volt peak in 1 ohm(2 ohm bridge)= 75 amp peak=>98 amp peak(with safety) =>irfb4227 has 46A at 100 degrees so you need 2.13 pairs😀, it will work with 2🙂, but for short circuit protection(or +-85 supply) you will need 3 pairs..
In this case:75 volt peak in 1 ohm(2 ohm bridge)= 75 amp peak=>98 amp peak(with safety) =>irfb4227 has 46A at 100 degrees so you need 2.13 pairs😀, it will work with 2🙂, but for short circuit protection(or +-85 supply) you will need 3 pairs..
thanks a lot cpx . in that case irfp250n/260n have to be like five pairs per channel t +/-75vlts and 2ohms bridge for irf540n at+/-40vlts 4pairs is that correct? and also
>>>which are the best pairs for output fet buffers among the below
2n5551/5401 , 2s/c2655/a1020 ,2s/a1013/c2229 , bc327/337 , bc368/369 , bc546/556 , bd139/140, mje 340/350
thanking you in advance
>>>which are the best pairs for output fet buffers among the below
2n5551/5401 , 2s/c2655/a1020 ,2s/a1013/c2229 , bc327/337 , bc368/369 , bc546/556 , bd139/140, mje 340/350
thanking you in advance
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