My class D amp

Hi Raj,

yes ver 1.2 PCB and modified to ver 3.0
you can go up to 480KHz for this you need a good mosfet. i like 200-250KHz range it is good for old generation MOSFETs without any problem.

Regards
MANOJ

Hi Manoj:

Can I use TL074 instead if 072&071? It will save pcb space and another free opamp can be used for protection.

Another issue, is it possible to replace 7404 & 555 with a micro controller?

Your comments are highly appreciated.

Thanks
Raj
 
Hi raj
i think micro controler is not fast enofe for porotection
CPX say to me this before
in class D amp we need a way that must be very fast to shutdown the mosfet driver IC and mosfets
sir manoj can help to you beter
have nice time my friend

After a long time Hadi!

Thanks for your reply. I was just wondering why an uC running @20MHz is not fast enough! to protect / trigger OC?

Besides, uC can also detect DC volts at Spk line without much component. This can be very good if uC is able to serve those purposes.

Thanks
Raj
 
hi my friend
i am so busy and i have many work for doing in my factory in last days off year
i am not electronic man
my best net friend CPX sayed to me the micro controler can not be fast enofe for doing protected
the dc voltage in amp out put is diferent voltage
some time 1 volt and some time 15 volt
new xmega can work with 3 volts and old 5 volts
what about AC volt in output of amp?
micro maybe damage
i dont test this before
i say before sir manoj can help you beter than me
have good day and do your job good and dont search the net bad boy when you are in work:)
 
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Hi ALL

AUD600 wired for SUB WOOFER RMS1400W@4R:):)

EQ for aud600 wired 100Hz sub filter:):)

Regards
MANOJ
 

Attachments

  • AUD600 used for SUB1400W.jpg
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Hi Raj,

Transfomer AC Voltage is 53.1V and DC supply rail +/-71.5V current 10A volume level is up to clip indicator blinking point; check speaker voltage @27VAC. Clip indicator steady and bright point; speaker voltage @31.6VAC {speaker point connected 5R 50W resistor and it is too hot and burning smell coming tested @5min.}
from this you can calculate the out put watt

@27V AC means 27pp = 729W RMS @ clip point
@31.6V = 998W RMS

Regards
MANOJ
 
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Class D amplifier with high performance and crystal oscillator

:) Good morning everyone.
My contribution to the forum.
Have ridden with separate PCBs (clock / PWM audio input, power and protection).
I am now making a single PCB to finalize the project.
OK testing and operation.
Regards to all.
 

Attachments

  • Amplificador de potência classe D com oscilador à cristal V2.jpg
    Amplificador de potência classe D com oscilador à cristal V2.jpg
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Hi luizcpimenta,

this is similar AUD1000C, thanks for new design. i will give you little correction for your design
1. Remove R129(1K5)
2. separate +15v supply for CD4060 for 12MHz switching it will take more current.
3. Re adjust R127 & R128 for PWM signal 3.3V level otherwise your Q103 will damage on long run(+B=75V or more)

Regards
MANOJ
 
Hi ALL

AUD600 wired for SUB WOOFER RMS1400W@4R:):)

EQ for aud600 wired 100Hz sub filter:):)

Regards
MANOJ


Hi Manoj:

I am trying to make a new PCB (AUD Ver3.0) with overload, DC protect and thermal protection. Basic AMP is taken from your schematic and protection will be controlled by micro-controller.

I need help for design the protection:

1. How much voltage needed to SD pin (IR2110) to trigger.
2. What will be the easier process to detect +ve over current as my micro will have +ve as its groound.
3. How to design/logic circuit to detect DC voltage at speaker line.
4. Can I use 12V BIAS voltage for relay and micro controller (5V with a regulator)

Thanks
Raj
 

Attachments

  • AUD_Ver_3.0.PNG
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Hi luizcpimenta,

this is similar AUD1000C, thanks for new design. i will give you little correction for your design
1. Remove R129(1K5)
2. separate +15v supply for CD4060 for 12MHz switching it will take more current.
3. Re adjust R127 & R128 for PWM signal 3.3V level otherwise your Q103 will damage on long run(+B=75V or more)

Regards
MANOJ

Hi Manojtm.
I really relied on AUD1000 you sent me.
Thanks for the tips for my amplifier.
You have the files from AUD600 to send me?
Thank you again.
luizcpimenta@gmail.com
luizcpimenta@yahoo.com.br