UCD 25 watts to 1200 watts using 2 mosfets

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#4,761
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
 
#4,762
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
 
#4,764
FULL BRIDGE CLASS D

Fullbridge completed for subwoofer with protection dc /overcurrent😉
 

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#4,774
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 😎 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 . 😡
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😕 any help some one??.😕 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 . 😕😕
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. 😕😕
 

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#4,776
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😕

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 <<
 
Last edited:
#4,777
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