UCD 25 watts to 1200 watts using 2 mosfets

[andrewlebon]

limiter for class d

SIMPLE LIMITER trying it out

 

[andrewlebon]

limiter for class d

Finally tested limiter on class d amp
warm regards
Andrew

 

[BaRuaDongNai]

Hi andrewlebon, can you share project limiter for everyone?

 

[andrewlebon]

Beringer limiter

Limiter for class d amps

 

[Dimonis]

Finally tested limiter on class d amp

Hi ,
but I cannot see any optocouplers on your pcb ? :eek What is the regulator element of the limiter ?
PS can you show a video how the limiter works ? I mean from a oscilloscope....

 

[yangjones1368]

it seems there is no heatsink which will limit your real output power.

 

[fra]

car3000d

And my product + - 80v at 1 ohm with LPF filter, OC, DC protection, vu meter.

 

[manojtm]

Hi All,

1500W SMPS +/-76V DC. MOSFET SPW47N60 and IR2153

Regards
MANOJ

 

[stewin]

hi manoj plans for the smps please . also have you included protection.?

 

[luka]

And my product + - 80v at 1 ohm with LPF filter, OC, DC protection, vu meter.

Interesting... was it tested on 1R yet?
look great... what was final price for all?

 

[stewin]

merry CHRISTmass to you all

 

[Dinithm]

thanks friend,your PCB works perfect.

regards

 

[Dinithm]

https://www.youtube.com/watch?feature=player_detailpage&v=vyP_6LfNpjE

 

[robson132]

Hi.
I want to build irs900d +/- 80V. I have a problem I do not know what to use for the reactor core. What do you recommend for the core of the amplifier?

 

[andrewlebon]

T106-2 T157-2 material 2 core

 

[Dinithm]

Hi.
I want to build irs900d +/- 80V. I have a problem I do not know what to use for the reactor core. What do you recommend for the core of the amplifier?

what is the load impedence and switching freaquncy

300khz>Fs>250khz
8 ohms speaker 80v/8ohm =10A (T106-2 is ok,T130-2 good)
4 ohms 20A need high currunt inductor (T157-2,T187-2,T200-2 best)
2 ohms 40A not possible for us(diy level)

Fs>300khz
8 matirial 6 matirial OK


http://www.micrometals.com/downloads/MicroRelease_March2010.exe

 

[robson132]

Many thanks for your reply..
The original frequency is 270-280khz. My smps has only 1,2kW and overload protection so load impedance is 8 ohms.
I decided to buy T157-2 core.

I have a problem irfp4772 are not available, what is replacement?

 

[Dinithm]

IRFB4227
IXTP50N20P - ideal
IRFP250n - OK

 

[Dimonis]

I decided to buy T157-2 core.

Better use ferrite core , it requires less turns and so less copper . The difference in losses is huge .

 

[robson132]

I already bought T157-2 if the council can not look for another..
What to look for when running this amp?