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Thread: Audio smps 700w (IR2153)

  1. #31
    Hello Silvio,

    I inserted Your SMPS to Schmidt-Walter calculator, and result .... too small ETD39. I'm wrong somewhere?


  2. #32
    diysmps Senior Member Silvio's Avatar
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    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

  3. #33
    Quote Originally Posted by Silvio View Post
    Choice of oscillators and protection

    The PCB can be adopted to work with a different oscillator as mentioned before due to the oscillator board and protection circuit is mounted on a separate pin header. This is plugged in the socket provided on the pcb. I also made plans to use different protection circuitry using either a Schmitt trigger or driving an SCR gate with both options pulling down pin 3 of the IR2153 to ground. However these type of protection brings out the need to reset by switching off the supply and waiting for the bulk cap to discharge until it can be switched on again. I prepared the prototype pcbs for these but have not been tried yet

    Heat sink and cooling

    A good heat sink is needed for the fets and output diodes as these are driven quite hard during the peak output. With the heat sink used the smps can handle the power easily if a small fan is included. I made a fan socket available for this reason. In my setup peak power could be held for quite a long time without things getting hot with the fan on. This was placed at the side to cool also the transformer

    Auxiliary output.

    An auxiliary output of 12v-0-12v is provided capable of around 800mA. This is intended to drive a preamp stage or some protection circuit on an amplifier. I often see the need of a separate output for this reason.

    The design voltage of the smps is 46-0-46 peak at 230 volts input. During my tests the output voltage went down to 78volts at 9.4 amps. The input voltage was 227vac with a power output of 730watts. The efficiency of the smps reached 90%.

    IF ANYONE IS INTERESTED IN BUILDING THIS SMPS I WILL SEND THE PDF FILE PRIVATELY


    Attachment 6150




    Good afternoon.
    Could you send me the files to build this project?
    Thank you.

  4. #34
    diysmps Senior Member Silvio's Avatar
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    Quote Originally Posted by luizcpimenta View Post
    Good afternoon.
    Could you send me the files to build this project?
    Thank you.
    The full PDF with instructions can be found on page 2 of this tread post #13

    Regards Silvio

  5. #35
    Quote Originally Posted by Silvio View Post
    The full PDF with instructions can be found on page 2 of this tread post #13

    Regards Silvio
    Thank You...

  6. #36
    thanks silvio for the 700watts smps pdf files.

  7. #37
    vlcsnap-2017-10-08-05h09m44s398.jpghi silvio,
    why differences in each layout?
    see the arrows,
    Attached Images Attached Images
    Last edited by nazirdigi; 10-07-2017 at 11:54 PM.

  8. #38

  9. #39
    diysmps Senior Member Silvio's Avatar
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    @ 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

  10. #40
    diysmps Senior Member Silvio's Avatar
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    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.
    Last edited by Silvio; 10-08-2017 at 07:33 AM.

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