Silvio
Active member
Please upload schematic of your pcb and also pcb with marked components. I am getting mixed up in what you did exactly.
Audio smps 700w (IR2153)
- Thread starter Silvio
- Start date
Please upload schematic of your pcb and also pcb with marked components. I am getting mixed up in what you did exactly.
Hi All !
Pcb's are in progress. I plan to debbug and test the prototypes in early July. I made two versions of this smps: the first one is symetrical low voltage. Second one is desing for tubes amps (low current, high voltage). I keep the same primary circuit, and protection circuit. Transformer turn ratio, secondary diodes, caps, inductors change on HV smps.
Keep in touch !
http://www.hostingpics.net/viewer.php?id=480381SMPS1.png
http://www.hostingpics.net/viewer.php?id=380621SMPS2.png
Pcb's are in progress. I plan to debbug and test the prototypes in early July. I made two versions of this smps: the first one is symetrical low voltage. Second one is desing for tubes amps (low current, high voltage). I keep the same primary circuit, and protection circuit. Transformer turn ratio, secondary diodes, caps, inductors change on HV smps.
Keep in touch !
http://www.hostingpics.net/viewer.php?id=480381SMPS1.png
http://www.hostingpics.net/viewer.php?id=380621SMPS2.png
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Silvio
Active member
Are you saying you got 2000 watts with ETD 39 and IRF740? Well 70+70 x 15A = 2100 watts and 140 x 10A = 1400 watts if it is so it does not seem so realistic. Driving IRF740 to their peak current (10A) don't last very long.
I hope you are referring to the schematic and SMPS that I uploaded and not something else.
Silvio
Active member
Dear Pietro, I am not sure but the input capacitance for IRF740 is 1400pf while the IRFP360 has an input capacitance of 4000. It could be that the IR2153 does not have enough current to switch the IRFP360 properly. It may need a current amplifier.
It is found that the gate charge of the IRFP360 however is quite low and I am not sure maybe it can be done. Someone else who is better than me could guide you here. Open a tread and ask the question and maybe another member will help you.
You can take a look at the SMPS that MicrosiM has designed using the IR2153 driving a couple of IRFP460 he used a current amplifier. The footprint of the PCB in my design does not fit ETD49
Regards, Silvio.
PCB finished. Need debug.
http://www.hostingpics.net/viewer.php?id=331648AMPSU1lowvoltageaudioamp.jpg
http://www.hostingpics.net/viewer.php?id=331648AMPSU1lowvoltageaudioamp.jpg
earthsounds
New member
Silvio.
Big thanks for sharing this project with us. I intend to build this SMPS and replace the linear PS I've build for my 300+300W bass amplifier but.... I can not find anywhere the bobbin you used in this project.
The only available vertical etd39 bobbins are 16 legs.
Could you be so kind and point me to the right place to get the bobbins you used?
Regards,
Rafal
Big thanks for sharing this project with us. I intend to build this SMPS and replace the linear PS I've build for my 300+300W bass amplifier but.... I can not find anywhere the bobbin you used in this project.
The only available vertical etd39 bobbins are 16 legs.
Could you be so kind and point me to the right place to get the bobbins you used?
Regards,
Rafal
Silvio
Active member
Hi Earthsounds, do not worry so much about the bobbin use a 16 pin one and then you can cut the extra pins on one side of the bobbin. There is ample space for it to sit on the pcb. I found that ferrite trafo from an old ATX computer smps and only God knows which Chinese manufacturer made it. All I can tell you is there was a name Viking on the outer tape. I don't know if it was by the firm who wound the trafo or the manufacturer. You will probably need to make margin tape for the first layer as it is only the first time that I found a step on the bobbin for the first layer margin.
Do not forget to put a good heat sink like I did otherwise the diodes heat up.
You can make fan temperature controlled if you want with a small circuit with a transistor and a thermistor to control the fan speed so that it will not be noisy on low power playback. Basically I made a fixed resistor with the supply to the fan so that I fixed a minimum speed (6-8volts). When the temperature of the thermistor reaches say 45 deg the transistor base will be biased enough to start shorting out the minimum speed resistor so the full voltage can pass to the fan motor, when things cool down again it will resume to minimum speed which will be hardly audible.
Regards Silvio
Do not forget to put a good heat sink like I did otherwise the diodes heat up.
You can make fan temperature controlled if you want with a small circuit with a transistor and a thermistor to control the fan speed so that it will not be noisy on low power playback. Basically I made a fixed resistor with the supply to the fan so that I fixed a minimum speed (6-8volts). When the temperature of the thermistor reaches say 45 deg the transistor base will be biased enough to start shorting out the minimum speed resistor so the full voltage can pass to the fan motor, when things cool down again it will resume to minimum speed which will be hardly audible.
Regards Silvio
Silvio
Active member
If you read carefully the smps is rated at 550 watts continuous and 700 watts peak. If some cooling to the trafo and heatsink are included more power can be absorbed. Keep in mind that the smps is intended for audio purpose and the load will never be continuous. You can take a look at the photos I posted, you can see that in fact it reached more than 700 watts if you calculate the output voltage multiplied by the output current. There is also a video on youtube showing the winding of the transformer for this smps. It is called winding small transformers for smps.
In my other project called 1000 watt smps based on ludo 3232 design I got around 1200 watts peak. Which is also published on this web site. In this I used etd 49 core. Again it is used for audio purpose and the continuous rating is 900 watts.
Regards,
Silvio
In my other project called 1000 watt smps based on ludo 3232 design I got around 1200 watts peak. Which is also published on this web site. In this I used etd 49 core. Again it is used for audio purpose and the continuous rating is 900 watts.
Regards,
Silvio
luizcpimenta
New member
Silvio
Active member
The full PDF with instructions can be found on page 2 of this tread post #13
Regards Silvio
luizcpimenta
New member
Thank You...
Silvio
Active member
@ Nazirdigi
1) That is where to have place to return with feedback (optional small board with opto etc near output) if you want to add it if using different driver.
2) There is also place where to use different caps on the output either a pair of 3300uf X 50v or 4 X 1000uf X 100v depending on output voltage used.
3) For output inductor if not regulated you can bridge them or use small rod inductor of 1.5uH on each rail. Do not use common mode inductor on output as it generates a lot of noise.
4) You have also option for using center tap direct on pcb like I did or you can use the trafo pins for center tap.
Regards Silvio
1) That is where to have place to return with feedback (optional small board with opto etc near output) if you want to add it if using different driver.
2) There is also place where to use different caps on the output either a pair of 3300uf X 50v or 4 X 1000uf X 100v depending on output voltage used.
3) For output inductor if not regulated you can bridge them or use small rod inductor of 1.5uH on each rail. Do not use common mode inductor on output as it generates a lot of noise.
4) You have also option for using center tap direct on pcb like I did or you can use the trafo pins for center tap.
Regards Silvio
Silvio
Active member
I made a different driver board for the video and uses HF soft start and short circuit protection with current trafo and SCR. I still have to make some more modification though and need to improve it. Maybe I will try SG3525 and IR2110 in future and add feedback as well. You can take a look at the other video for the 350w rms smps that used current limiter but on PCB instead of different driver board. This is also posted here on this site and have full instructions.
Please not do not change start up circuit as it works very well with IR2153 chip. It is good and strong. It also takes care of main input bus capacitor to charge up before chip start working.
The Current limiter driver works very well with capacitve coupling method instead of current trafo.
There is also place to put another 1n4148 diode to make AUX supply stronger. However I did not put link and used half winding for Aux supply. For current limiter option use only half winding with 1 diode for Aux supply and IR2153 chip.
You can alter driver as much as you like as the main components are on PCB while driver board can be changed with a different circuit.
I hope that helps Silvio.
Please not do not change start up circuit as it works very well with IR2153 chip. It is good and strong. It also takes care of main input bus capacitor to charge up before chip start working.
The Current limiter driver works very well with capacitve coupling method instead of current trafo.
There is also place to put another 1n4148 diode to make AUX supply stronger. However I did not put link and used half winding for Aux supply. For current limiter option use only half winding with 1 diode for Aux supply and IR2153 chip.
You can alter driver as much as you like as the main components are on PCB while driver board can be changed with a different circuit.
I hope that helps Silvio.
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