UCD 25 watts to 1200 watts using 2 mosfets

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stewin

Member
Joined 2007
badboy6120 said:
Hey guys
So looks like nobody's here
I'll appriciate if anybody could help me with this amp

I manage to run this amp after a lot of mosfet failures and now the sound is kind of good but not great
I noticed that the negative rail draws way more current than positive one. when I increase the output power to about 100w, the current draws from negative rail is about 2 A while the positive one only consume 0.6 A
is this normal due to the supply of IR2110 by negitive rail?
Also I can't get a clear upper wave form in the output as you could see in the video below:
YouTube

PS: I'm using this schematic
image.png - Google Drive

Thanks in advance
Click to expand...

your answer is in the previous posts.by those who made this amp before , please scroll way ,way upwards
 
D

Dinithm

Member
Joined 2010
badboy6120 said:
Hey guys
So looks like nobody's here
I'll appriciate if anybody could help me with this amp

I manage to run this amp after a lot of mosfet failures and now the sound is kind of good but not great
I noticed that the negative rail draws way more current than positive one. when I increase the output power to about 100w, the current draws from negative rail is about 2 A while the positive one only consume 0.6 A
is this normal due to the supply of IR2110 by negitive rail?
Also I can't get a clear upper wave form in the output as you could see in the video below:
YouTube

PS: I'm using this schematic
image.png - Google Drive

Thanks in advance
Click to expand...

Simple, problem on C3 (1uf) bootstrap of ir2110 ,just replase 1uf to 10uf capacitor or add another 4.7uf
 
andrewlebon

andrewlebon

R.I.P.
Joined 2008
FULL BRIDGE CLASS D

Fullbridge completed for subwoofer with protection dc /overcurrent;)
 

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S

stewin

Member
Joined 2007
stewin said:
hi all busy perfecting smps and ucd semi discreet .that is lm 311 and ir2110 in ucd amp. all is well the amp is o.k and cool even at 2 ohms :cool: but ocp protections are the ones holding me back .i have made lorylaci ucd version with protection ,it works well but trips very soon / early. i think when the amp is 60% loud . :mad:
i wanted it to reach about 92% at 2ohm per channel because i wanted to use full bridge +/-70vlts fets used are a pair of irfb4227 per channel:confused: any help some one??.:confused: the schematic ic below and my layouts are below.
Click to expand...

it has been over three years and this amp is powerful but has major stability issues,
i used different layout designs and components , through hole or smd components failure is a must after long term usage . :confused::confused:
worst failure is when you use more than 1 channel in one casing , all channels will fail and only one will remain.

with or without protection the results are the same.

any way the good side of this amp is when bridged at +/-85 volts it is :hot::redhot:insanely powerful :hot: and just warms no high heating of output fet devices a moderate sink with a small fan is more than enough .tried at 4ohms and 8ohms . but it is not stable , after working well and with good connections , it will just fail for no good reason at all. :confused::confused:
 

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S

stewin

Member
Joined 2007
manojtm said:
Hi stewin,

11CH Sigma delta class D with @+/-60V rail (pioneer SC-LX901):):)

Regards
MANOJ
Click to expand...

hello too sir
wow wonderful , how do they deal with interference which causes failure:confused:

i also made sigma delta which is class d 200w using tl074 . i made up to six channels with two smps Offline full-bridge SMPS....need help and had no issues . but my voltage used was +/-38 volts photos >> diysmps <<
 
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Boris535

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Joined 2019
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