Class D Amp with LM566, LM393 and 2XIRF530

[apexaudio]

I think i've spoted some mistakes on the left LM311:
out(7) is not connected to emiter 5401,
missing connection left LM311 IN-(3) to OUT2(7) of right mc33078,
pins inverted on schematic, OUT2(7) of U1B it's connected to IN+ of LM311(2) but shows pin 3, and IN- (3) show 2, so maybe connections wrong, mr, Mile could tell us.


Good job for first try, keep practice, use zone instead of track when you want to fill area, route tracks between pins and can ditch straps

D2000

 

[ravpreet420]

Can i use output inductor 33uh 16A from brand coilcraft..???
What i can change?

 

[stewin]

the amp is switching at low frequency , you,ll need a higher value inductor

 

[khalsa]

class d

very help full circuit

 

[lycanlk]

very help full circuit

Yes, It has many things to learn for DIYers . Thanks for sharing. Anyway D2000 is still more DIY friendly and still a mono block which can be bridged later 🙂 Only drawback is the big output inductor. I think I have to use 2x150uH in Series 🙂

 

[andrewlebon]

LM311 feedback resistor 12K from pin2 to pin 7 corrected on lay file

 

[andrewlebon]

LM311 MC33078 pin 3 and pin 5 connected to power ground through 470 ohms resistor
another correction please tell me if i am wrong

 

[andrewlebon]

D2000

Hello apexaudio
greetings please can you check pcb layout for any mistakes
warm regards
Andrew😕

 

[andrewlebon]

D2000

jpg D2000

 

[c08bm]

Ok, I guess I figureD it out.

 

[andrewlebon]

Hello c08bm
greetings your pcb design is looking cool did you find anymore errors
please can you post SPRINT LAY file
warm regards
Andrew

 

[Pafi]

D2000

I like the idea of mudulating the switching frequency, but I dont understand why asymmetrically. Is it intentional?

And why so high low freq cutoff? 100 nF and 10k gives 160 Hz limit.

 

[c08bm]

I hope it's ok now

For toner transfer you need to mirror only TOP side

 

[Hadighorbani]

hi
good day
any one test D2000 amp?
what is this amp?

 

[zoky2]

My Apex D200 powered with +-70V SMPS. Some resistors are very hot ,the fets and coil are just warm.Sound is good ,no hiss,no nois from SMPS.Very good amplifier,I will use it for small partys at home🙂🙂.

Regards
zoky2

 

[apexaudio]

My Apex D200 powered with +-70V SMPS. Some resistors are very hot ,the fets and coil are just warm.Sound is good ,no hiss,no nois from SMPS.Very good amplifier,I will use it for small partys at home🙂🙂.

Regards
zoky2

Nice work.
Regards

 

[ChingTan]

apex what is the maximum i can supply to my d200 with output mosfet irf640 with tip31 in bias regulator ?

 

[apexaudio]

apex what is the maximum i can supply to my d200 with output mosfet irf640 with tip31 in bias regulator ?

+/-55V

 

[zoky2]

When I was testing D200,i was discover that the zobel resistor is very hot,so I take some measurement with osciloscop at output. I discovered oscilation , around 245 khz and 2,24Vpp.Changing SMPS with linear power supply make no diferents.Any suggest how to fix it?

Regards
zoky2

 

[Pafi]

When I was testing D200,i was discover that the zobel resistor is very hot,so I take some measurement with osciloscop at output. I discovered oscilation , around 245 khz and 2,24Vpp.Changing SMPS with linear power supply make no diferents.Any suggest how to fix it?

Regards
zoky2

Link to the schematic?

This voltage doesnt seem to be a bug. Its a feature due to the nature of ClassD. Heat is a different thing. But need to know the values to optimise.