UCD 25 watts to 1200 watts using 2 mosfets

[stewin]

Hi stewin,

for class d filter use ETD29 core with 1mm air gap( supply +75v -75v)

Regards
MANOJ

thanks manoj how many turns for 35uh ??



guyz the clear pdf artwork for the 4K5 have fun with real tested high power class d

 

[Ouroboros]

An ETD29 core with a 1mm gap in the centre leg only will have an inductance factor (Al) of close to 125nH.

The equation for the total inductance (where N is the number of turns) is N^2 * Al.
So 17 turns will give you roughly 35uH.
If you are adding a 1mm gap to an ungapped core set (so the gap is in all legs), the Al will be much lower of course.

 

[stewin]

An ETD29 core with a 1mm gap in the centre leg only will have an inductance factor (Al) of close to 125nH.

The equation for the total inductance (where N is the number of turns) is N^2 * Al.
So 17 turns will give you roughly 35uH.
If you are adding a 1mm gap to an ungapped core set (so the gap is in all legs), the Al will be much lower of course.

thanks ouroboros

so gap in all legs it will come to how many turns to make 35uh

 

[Ouroboros]

It is not a parameter that is defined in the data for the cores. This is the time to buy a low cost inductance meter perhaps?
When I get an unknown core, I wind a known number of turns on, measure the inductance and then determine Al. I then can use this value to calculate the mumber of turns needed for any required inductance on that particular core.

 

[jcoelhogsia]

An externally hosted image should be here but it was not working when we last tested it.

[/URL][/IMG]

 

[ravpreet420]

irs 3000 coil inductance(uh) ?

 

[manojtm]

Hi stewin,

i used 40T .85mm core 1mm gap all (@70uH) fsw=250KHz cap=2.5uF/250V, cool quite
MOSFET IRFP250N with resistor 39 Ohm.

Regards
MANOJ

 

[manojtm]

thanks manoj how many turns for 35uh ??

Hi stewin,

use 28T for 35uH

regards
MANOJ

 

[stewin]

Hi stewin,

i used 40T .85mm core 1mm gap all (@70uH) fsw=250KHz cap=2.5uF/250V, cool quite
MOSFET IRFP250N with resistor 39 Ohm.

Regards
MANOJ

what voltage? and speaker impedance? did you drive hard?


thanks for reply

 

[stewin]

the component side side of pcb

thanks to ht forum

Amplificador Classe-D - Página 74

have all the fun with high power amps



" seek and you shall find "

 

[manojtm]

what voltage? and speaker impedance? did you drive hard?

Hi stewin,

Voltage +75V -75V 10A
SPK = 8Ohms 300W tested
SPK = 4Ohms 600W tested
SPK = 3x 8Ohms(Parallel) 900W tested.

Input 1.3V p-p Audio signal from mixer @ max clip level (1hr tested)

Regards
MANOJ

 

[NMOS]

NANOS PCB for 3 pair

warm regards
andrew lebon

Hi andrewlebon

can I get schematic from this amp ?

have only chesthap/triell 3200 1 Ohm schematic

 

[stewin]

to add to the true spirit of diy

here is the inductance meter artwork, schematic and pic hex files have fun all

thanks to systemjol htforum.com

 

[andrewlebon]

schematic of irs3000

Hi andrewlebon

can I get schematic from this amp ?

have only chesthap/triell 3200 1 Ohm schematic

Hi Nmos
greetings no schematic exists just make the pcb and put components there are different variations all work power output depends on mosfet used trying to put dc protection clipping temprature cut off on one pcb

warm regards
andrew lebon

 

[stewin]

even i don't have the 4k5 schematic . please post the triel 3200at 1ohm schematic.

 

[exflaco]

Andrew,Stewin, the schem the same irs900 plus 555 and lm311 OCP with 2 1oms 2w paraleled at -v rail obvius more 2 totem pole,or irs2000 plus totem schem the same tl071 4049 and ir driver for all irs models

 

[stewin]

Andrew,Stewin, the schem the same irs900 plus 555 and lm311 OCP with 2 1oms 2w paraleled at -v rail obvius more 2 totem pole,or irs2000 plus totem schem the same tl071 4049 and ir driver for all irs models

hi exflaco thanks . pls post the correct irs correct schematic with ocp protection

 

[Hadighorbani]

thanks to stewin

to add to the true spirit of diy

here is the inductance meter artwork, schematic and pic hex files have fun all

thanks to systemjol htforum.com

thanks to much
this board is so much usefull
thanks stewin
you are a good boy

 

[stewin]

thanks to much
this board is so much usefull
thanks stewin
you are a good boy

we thank GOD

a more clearer schematic

 

[Hadighorbani]

thanks to stewin

we thank GOD

a more clearer schematic

sorry for my bad english
thanks for every thinks you do for all peopel in DIY site
and thanks for clear shematic
i was buy component for this LC meter today
i will try it tomarro morning