Class D Amp with LM566, LM393 and 2XIRF530

[apexaudio]

APEX D250

DIY friendly class D amp

 

[andrewlebon]

Hi Apexaudio
greetings this one has easy to get parts any pcb 2 share for this amp
warm regards
andrew lebon

 

[baga]

Stop using irfp250 , irfp 260 , irfp 460 , irf640 mosfets in class d amplifiers!!!These parts were designed some years ago and have poor performance. Only irf540n or better irf540z are adequate for class d from the older series.
Much more adequate are the newer irfb4xxx mosfets

 

[apexaudio]

Stop using irfp250 , irfp 260 , irfp 460 , irf640 mosfets in class d amplifiers!!!These parts were designed some years ago and have poor performance.
Much more adequate are the newer irfbxxxx mosfets

It's only for DIY, I use IXTQ88N30P instead IRFP350 for high power amps. IRFB33N15 can be use instead IRF540.
I suggest to use class D for subwoofer amp.

 

[QQ12e5k1]

Class D

DIY friendly class D amp

How to make the output inductor, Sir??

Regards

 

[apexaudio]

How to make the output inductor, Sir??

Regards

On 30mm red torus core 120 turns 1,5mm wire for 100uH or 35 turns for 30uH.

 

[apexaudio]

For 1uH 12 turns 1,5mm wire on 10mm air.

 

[apexaudio]

On 30mm red torus core 120 turns 1,5mm wire for 100uH or 35 turns for 30uH.

On 40mm red torus core 120 turns 1,5mm wire for 100uH or 35 turns for 30uH.
On 30mm red torus core 45 turns 1mm wire for 30uH.
Use 40mm core for over 500W amp power.

 

[Hari W]

Dear, Apex are you continue project the d500 amp?
Already test? because i wondering to make this d500 class d amp, your schematic and PCB not same, please advice, thanks.

 

[apexaudio]

Dear, Apex are you continue project the d500 amp?
Already test? because i wondering to make this d500 class d amp, your schematic and PCB not same, please advice, thanks.

Do you considering to start with D250 it's simple 'diy friendly' amp?

 

[Hari W]

Does you have pcb for d250, actually I am in pursuance of attempt the schematic Crest LT1000 by crest audio and this looks like of your project DIY d500?

For triangle pulse oscillator diode BAT85 can be changed with 1N4148? because hard to find BAT85 in my town?

Can you explaned regarding bridge diode BAT85 how to work?

Thankyou.
Hari Wibowo
Jambi-Indonesia.

 

[apexaudio]

Does you have pcb for d250, actually I am in pursuance of attempt the schematic Crest LT1000 by crest audio and this looks like of your project DIY d500?

For triangle pulse oscillator diode BAT85 can be changed with 1N4148? because hard to find BAT85 in my town?

Can you explaned regarding bridge diode BAT85 how to work?

Thankyou.
Hari Wibowo
Jambi-Indonesia.

Bridge diode BAT85 revert zener polarity for simetrical triangle pulse, use this circuit with meatched 5,1V zeners and without diode bridge.
Regards

 

[apexaudio]

D500 is similar to CREST LT amplifiers, I try to make it simple for DIY like D250 but not selfoscilating (UCD).

 

[QQ12e5k1]

can I use green torus or grey instead red???
Hard to find the red torus..

Regards

 

[apexaudio]

can I use green torus or grey instead red???
Hard to find the red torus..

Regards

You can decrease triangle oscillating frequency for your torus core and use amplifier only for subwoofer.

 

[Hari W]

Class D Amp with LM566,LM393 and 2XIRF530

Dear Apex-Audio,
Does you have pcb for d250 ?

Regards
Hari W

 

[mihailo]

Hi, Apex. I want to build your SMPS +/-50V. Can you tell me what is value grec circuit and inductors, that I mark you in the picture? Can I use 1N4007 instead of FR107? Do you have PCB or I need to draw it?

 

[stewin]

hi apex can your d amp push 2ohms hard comfortably

 

[don2007ksa]

hi Hari good day,any schematic of this apex D500 planning to build one for my FULL range application,thank's.

 

[exflaco]

schem and pcb

Hey apex sir please share the schem and pcb Apex d500 a lot people waiting for you