Class D Amp with LM566, LM393 and 2XIRF530

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#822
vargasmongo3435 said:
Hello guys

this is I think the last layout if any more options needed let me know, this is just a redrawing of the original file that mister Mile already post long time ago I think is a great project to do and I want it to learn class D from this design maybe later I will order a few PCB to try out, the only thing I want to have a more space so the mosfets can be screw them into the heat sink more easily and also I add the heat sink option so it will secure TIP31C better, also as you can see I have a bit more space on the PCB I add two 0R1 3W resistors in case you don't want to install upright way those resistors, and lastly I add a European type terminal and I leave the the original input if you want just to solder the input wire to that area, the coil I decide to leave the original dona "O" type and add the "fancy" too part number VER2923-333KL 33uH 100 amps here are an image of the coil been use, like this Class D amplifier, the PCB size is now 144 mm x 64 mm

I just put my ideas here I'm not an expert but I like to share PCB ideas 🙂

Best Regards
Juan
Click to expand...

Coilcraft VER2923 is good, I'm using it for my jlaudiophile-250D and 900D. Was able to get 450W 2 ohms +/-65V DC rails (VER2923-153KL). Amp also survived when stress tested at 150W output in 1.5 hours (no fan or forced cooling). At 500khz and above operating frequency, the inductor is very cool to touch.
 

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#824
Pafi said:
Yes, you made a mistake. Transformers with voltage doubler rectifiers must not loaded asymmetrically, because it makes your transformer saturated. And your amplifier does this in every moment. (Not only the average must be symmetrical.) 1st step: make 2 (symmetrical) secondary, and a full bridge rectifier. Maybe other modifications will also be needed to get optimal results.
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thank you a lot
 
#837
SHALOM .... APEX AUDIO THANK YOU IN ADVANCE FOR SHARING YOUR GREAT DESIGN OF AUDIO AMPLIFIER,,,,, I LIKE MUCH YOUR DESIGN... I JUST ASK REGARDING YOUR D200 AMP SMPS AMP IF I CAN USE 50VAC 0 50VAC TOROID 0R 60VAC 0 60VAC TOROID TRANSFORMER? INSTEAD OF REAL SMPS PSU?
 
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