UCD 25 watts to 1200 watts using 2 mosfets

stewin · 2013-01-05 6:18 pm

hi akraj, i haven't made the power supply side , but the amp side is o.k. . i am suspecting the issue is like mine .

the 7404 is the issue .

please use the 74hc04 that is the only one which works the dm7404 never worked in my case.
also connect the -ve side of the aux and ir2110 with the main -ve side

akraj · 2013-01-05 6:42 pm

stewin said:
hi akraj, i haven't made the power supply side , but the amp side is o.k. . i am suspecting the issue is like mine .

the 7404 is the issue .

please use the 74hc04 that is the only one which works the dm7404 never worked in my case.
also connect the -ve side of the aux and ir2110 with the main -ve side

HI Stewin:

I am using 74HC04. Okay....how to power up the amp board without power board? There is 3 PIN for BIAS

1. 12 +ve with respect to -ve
2. I don know, what is that for
3. -ve

I can arrange 12+ transfomer for BIAS supply, will connect the "0" to -ve rail. then what?

Please help me out.

stewin · 2013-01-05 8:42 pm

akraj said:
HI Stewin:

I can arrange 12+ transfomer for BIAS supply, will connect the "0" to -ve rail. then what?

Please help me out.

it is+12 and the -12 connect to -ve of main powersupply of the amp not 0vlts

also leave the center pin leave it not connected. because it is for protection if you connect it to -ve it will trigger the protection.

lastly change the led light pins it is drawn opposite.

aman khalsa · 2013-01-06 5:40 am

akraj said:
HI Stewin:

I am using 74HC04. Okay....how to power up the amp board without power board? There is 3 PIN for BIAS

1. 12 +ve with respect to -ve
2. I don know, what is that for
3. -ve

I can arrange 12+ transfomer for BIAS supply, will connect the "0" to -ve rail. then what?

Please help me out.

pls post some pic's may b that can help... thanku

akraj · 2013-01-06 5:47 am

stewin said:
it is+12 and the -12 connect to -ve of main powersupply of the amp not 0vlts

also leave the center pin leave it not connected. because it is for protection if you connect it to -ve it will trigger the protection.

lastly change the led light pins it is drawn opposite.

Hi Stewin: thanks for stepping forward.

Just to cross check, do I need a aux power with 12-0-12? Split supply? Or 12-0 is okay? Is it possible to share a drawing?

stewin · 2013-01-06 7:15 am

akraj said:
Hi Stewin: thanks for stepping forward.

Just to cross check, do I need a aux power with 12-0-12? Split supply? Or 12-0 is okay? Is it possible to share a drawing?

you only need a supply with sinngle rail that is +12 & - 0vlts
but the 0vlts of 12vlts power supply connect it to -ve of amp power supply.

hope the below photos by manoj will help

akraj · 2013-01-06 7:55 am

stewin said:
you only need a supply with sinngle rail that is +12 & - 0vlts
but the 0vlts of 12vlts power supply connect it to -ve of amp power supply.

hope the below photos by manoj will help

Okay, good. I assume the same. Is there any other modification needed if I do not use power board?

akraj · 2013-01-06 3:20 pm

akraj said:
Okay, good. I assume the same. Is there any other modification needed if I do not use power board?

Hi Stewin & Manoj:

Today I managed to run the amp, but there are some issues.

I gave input at PIN-2 (TL072) and then audio comes out from the spk line. But I cannot turn the volume high as the LED lits and goes in to protection mode and immediately releases. But if I use low volume then it is okay.

However, if I give input at -+ (10uF caps) then nothing in spk line.

Looking forward for your help.

Thanks
Raj

akraj · 2013-01-07 4:40 am

akraj said:
Hi Stewin & Manoj:

Today I managed to run the amp, but there are some issues.

I gave input at PIN-2 (TL072) and then audio comes out from the spk line. But I cannot turn the volume high as the LED lits and goes in to protection mode and immediately releases. But if I use low volume then it is okay.

However, if I give input at -+ (10uF caps) then nothing in spk line.

Looking forward for your help.

Thanks
Raj

Besides, 47ohms resistor are becoming too hot, actually bunrns immediately. why this is happening?

akraj · 2013-01-07 8:39 am

aman khalsa said:
pls post some pic's may b that can help... thanku

Here are some PIC's

manojtm · 2013-01-07 8:44 am

Besides, 47ohms resistor are becoming too hot, actually bunrns immediately. why this is happening?

Hi raj

may be your filter coil not good.EE core with 24Turns 1mm gap(all) or use T106-2 with 59Turns. HF noise is High that's why 47 Ohm resistor burns.

Regards
MANOJ

manojtm · 2013-01-07 9:20 am

Hi Stewin & Manoj:

Today I managed to run the amp, but there are some issues.

I gave input at PIN-2 (TL072) and then audio comes out from the spk line. But I cannot turn the volume high as the LED lits and goes in to protection mode and immediately releases. But if I use low volume then it is okay.

However, if I give input at -+ (10uF caps) then nothing in spk line.

Looking forward for your help.

Hi Raj,

use BAL IN for input or you can use as unbalanced mode
UN Balanced Mode:
(+) sign connected to GND(marking shows wrongly)
(-) sign as input with respect to GND

Regards
MANOJ

akraj · 2013-01-07 9:20 am

manojtm said:
Hi raj

may be your filter coil not good.EE core with 24Turns 1mm gap(all) or use T106-2 with 59Turns. HF noise is High that's why 47 Ohm resistor burns.

Regards
MANOJ

Hi Manoj: I will try to improve filter coil, I won't be able to manage T106-2 cores.

How to solve input issue?

Thanks
Raj

akraj · 2013-01-07 9:23 am

manojtm said:
Hi Raj,

use BAL IN for input or you can use as unbalanced mode
UN Balanced Mode:
(+) sign connected to GND(marking shows wrongly)
(-) sign as input with respect to GND

Regards
MANOJ

Thanks a lot

akraj · 2013-01-07 9:25 am

manojtm said:
Hi raj

may be your filter coil not good.EE core with 24Turns 1mm gap(all) or use T106-2 with 59Turns. HF noise is High that's why 47 Ohm resistor burns.

Regards
MANOJ

All the legs will have 1mm gap or only middle one?

manojtm · 2013-01-07 9:28 am

All the legs will have 1mm gap or only middle one?

Hi Raj

All legs

regards
MANOJ

akraj · 2013-01-07 9:33 am

manojtm said:
Hi Raj

All legs

regards
MANOJ

Another question, which wire size to use? For EE core, used in pc psu.

manojtm · 2013-01-07 11:52 am

Another question, which wire size to use? For EE core, used in pc psu.

Hi raj

0.8mm wire or 1mm wire

Regards
MANOJ

Deleted member 148505 · 2013-01-08 2:25 pm

manojtm said:
Hi stewin,

do not need for three inverter buffer stage(IRS900),when you apply high voltage the buffer and level shift(2n5401) should be aligned properly.i mean you change resistor collector and emitter side of 2n5401 then it will work(10K & 8K2)for higher voltage.

Regards
MANOJ

Hi Stewin,

Did you try this on your IRS900?

Hadighorbani · 2013-01-08 7:27 pm

any one have the corect picthure for IRS1500 and 900 ?
i mean bottome and layout PIC
stewin ...

UCD 25 watts to 1200 watts using 2 mosfets

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