My class d IRS2092 project

[luka]

you have problems with IRS supply??
For Vaa and Vss I have 470uF for each
But I still don't understand why won't it work with 4227's and damn good gate drivers

[nigelwright7557]

Originally Posted by luka

But I still don't understand why won't it work with 4227's and damn good gate drivers

It will work with 4227 as that is what I am using.

The VCC supply also charges up the VB supply when vs is at zero volts.
This takes a chunk out of the vcc supply and resets the 2092.
Adding a 47uf to the vcc supply fixed this problem.

[luka]

Originally Posted by nigelwright7557

It will work with 4227 as that is what I am using.

The VCC supply also charges up the VB supply when vs is at zero volts.
This takes a chunk out of the vcc supply and resets the 2092.
Adding a 47uf to the vcc supply fixed this problem.

I don't understand, first it didn't work with 4227's, and now it does? And you just added 47uf?

[nigelwright7557]

Originally Posted by luka

I don't understand, first it didn't work with 4227's, and now it does? And you just added 47uf?

Yes. I can only guess there was something wrong with my 12 volt supply.
Adding 47uf instead of the 10uf was enough to get rid of the 12 volt glitches.

What was happening was the the first HO pulse reset the 2092.
This happened because the vb took power from the 12 volts through the diode and 22uf and this caused the 12 volts to drop out a volt or so and so resetting the 2092.

Might just have been my 12 volt supply was poor and wasnt decoupled enough.

[luka]

ok, so then tell me what resistors and caps you have to set 2092, so I can check what is diffrent from my

Also, what is your supply voltage? and you drive 4227 directly? What Rgate do you use?

[nigelwright7557]

Originally Posted by luka

ok, so then tell me what resistors and caps you have to set 2092, so I can check what is diffrent from my

Also, what is your supply voltage? and you drive 4227 directly? What Rgate do you use?

I have used the circuit in irs2092 datasheet.

Only difference is I have used maximum deadtime and changed the vcc 10uf to 47uf.

Rgate are 10R.

I use +/- 35 volts supply.

[luka]

same freq setting elements?
you are talking about elements as for IRAUDAMP5 reference design?
can you use higher voltage? I always had +/-60

[nigelwright7557]

Originally Posted by luka

same freq setting elements?
you are talking about elements as for IRAUDAMP5 reference design?
can you use higher voltage? I always had +/-60

Download the datasheet for the irs2092.

Not the application note or iraudamp5.

I use same freq elements.

I havent tried a higher voltage yet.

Due to the TO220 package I am having trouble getting more than 5 amps out of the pcb tracks, so currently I cant get more than 100 watts without using 2 oz copper. WIth 2 oz copper i can get 400 watts.

[nigelwright7557]

Originally Posted by luka

same freq setting elements?
you are talking about elements as for IRAUDAMP5 reference design?
can you use higher voltage? I always had +/-60

Give me your email address and I will send you the pdf for irs2092.

[luka]

Originally Posted by nigelwright7557

Give me your email address and I will send you the pdf for irs2092.

you can click icon down below for my email, but I have pdf of 2092 from IR, so I see datasheet