Hi everyone,
I'm interested in making a class D power amplifier, I've searched for information in many websites, but I've only found block diagrams, I don't know which components I should use, I'm not interested in class d chipamps, I want to make a discrete design, but at IC level not at transistor level, I also want to know which are the best output mosfet models to use, it's better to use negative feedback or not.
I also don't know how to implement the switching controller, because if I have shoot thru I can destroy the output devices.
Thank you very much for your atention,
Best regards,
Daniel Almeida
I'm interested in making a class D power amplifier, I've searched for information in many websites, but I've only found block diagrams, I don't know which components I should use, I'm not interested in class d chipamps, I want to make a discrete design, but at IC level not at transistor level, I also want to know which are the best output mosfet models to use, it's better to use negative feedback or not.
I also don't know how to implement the switching controller, because if I have shoot thru I can destroy the output devices.
Thank you very much for your atention,
Best regards,
Daniel Almeida
It is usually done with triangle wave generator and input signal both going into a comparator.
Next is the level translator for the ir2113.
You can take care of shoot through by discharging the mosfet gates with a diode but charging them up through 10 ohms.
This was my approach.
Do a search on DIYAUDIO for class d amplifiers and you will find a few examples.
Next is the level translator for the ir2113.
You can take care of shoot through by discharging the mosfet gates with a diode but charging them up through 10 ohms.
This was my approach.
Do a search on DIYAUDIO for class d amplifiers and you will find a few examples.
Excuse me can you give me a link to some schematic, or example,
I don't know, but something simple, just to start,
Did you know a good switching controller IC?
Thank you for your help,
Best regards,
Daniel Almeida
I don't know, but something simple, just to start,
Did you know a good switching controller IC?
Thank you for your help,
Best regards,
Daniel Almeida
Hello everyone,
Does anyone have tried to reproduce this project from International Rectifier?
This circuit works?
It is a good circuit?
Thank you very much for your attention,
Best regards,
Daniel Almeida
http://www.irf.com/technical-info/refdesigns/iraudamp1.pdf
Does anyone have tried to reproduce this project from International Rectifier?
This circuit works?
It is a good circuit?
Thank you very much for your attention,
Best regards,
Daniel Almeida
http://www.irf.com/technical-info/refdesigns/iraudamp1.pdf
I have used the circuit from the application notes.
I had a few problems.
The 2092 is fussy about decoupling.
PCB layout needs to be short and fat.
The basic circuit causes the 2092 to reset itself on high power output, so I used potential dividers on the inputs for measuring mosfet DS.
I didn't use any protection except for fuses.
I found for getting 1000watts I needed mosfet gate drivers IC's (TC4420) for driving 4 off irfb4227.
I had a few problems.
The 2092 is fussy about decoupling.
PCB layout needs to be short and fat.
The basic circuit causes the 2092 to reset itself on high power output, so I used potential dividers on the inputs for measuring mosfet DS.
I didn't use any protection except for fuses.
I found for getting 1000watts I needed mosfet gate drivers IC's (TC4420) for driving 4 off irfb4227.
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