Page 10 of 14 FirstFirst ... 89101112 ... LastLast
Results 91 to 100 of 133

Thread: Audio smps 700w (IR2153)

  1. #91
    .... Silvio's Avatar
    Join Date
    Apr 2015
    Location
    Malta
    Posts
    855
    Blog Entries
    9
    Quote Originally Posted by xuantunt View Post
    How to set the power limit to work correctly. For example I want to limit it to 1000W, what must I change on the circuit? Thanks a lot.
    It depends on which power supply are you referring to; Is it the 700w smps or the 1000w? The 700w smps has a current limiter and not a short circuit protection. The 1000w smps uses a current transformer and a voltage comparator to accurately shut down in the event of over current or short circuit.

  2. #92
    Quote Originally Posted by Silvio View Post
    It depends on which power supply are you referring to; Is it the 700w smps or the 1000w? The 700w smps has a current limiter and not a short circuit protection. The 1000w smps uses a current transformer and a voltage comparator to accurately shut down in the event of over current or short circuit.
    Thank you for your reply. My 1000W kit has been revised according to your 700W prototype. I use fet 460 and EC42 transformer. I use sub-board 5401 and 5551, protect against short-circuiting very well. Overload protection does not work. I want to know if there is any way to use both?

  3. #93
    .... Silvio's Avatar
    Join Date
    Apr 2015
    Location
    Malta
    Posts
    855
    Blog Entries
    9
    Hi I do not think you can use both. It will be either short circuit protection and the power supply will stop. You have to switch off and wait for the bulk capacitor to discharge then switch on again for reset. It will be better if you use a current transformer for short circuit protection. If you used my pcb then you have space for it. See attached fig below

    current trafo 700w.JPG

    EE42 transformer I dont think is large enough for 1000w. There are two types of EE42 one is 42/21/15 and the other 42/21/20. The first one has a maximum power of just over 1000w at 65kHz and the thicker one is just 1300w. You are a little bit limited here as the cores are very close to the wanted power and they may saturate. I suggest you will use ETD49 core which is more suitable for this power

    The first prototype of my smps uses a current limiter. This also create a soft start for the secondary capacitors to charge up. Unfortunately it does not work for short circuit. The IR2153 does not have soft start and there need to be another way to charge up the secondary capacitors and even to cater for when starting the smps on load

    The IR2153 may not have enough drive current to switch IRFP460 (only 180mA) and at least you will need some kind of arrangement to boost up the drive and discharge current. You will need at least 1 to 1.5 amps to drive IRFP460 properly. Do not be fooled if it works on light load as when it comes to heavy current the fets will need a good drive and if they dont find it they may heat up and explode.

    You will also need a better auxiliary current and also a better start up circuit. The way this circuit is configured is not suitable for more power. I guess you will be better off making Ludo's version for 1000w
    Last edited by Silvio; 05-10-2019 at 04:17 AM.

  4. #94
    Thank you for the quick reply. Maybe I need to develop version over 2kw at another prototype. With your prototype I used electronic load to test over 1200W within minutes.

  5. #95
    .... Silvio's Avatar
    Join Date
    Apr 2015
    Location
    Malta
    Posts
    855
    Blog Entries
    9
    Quote Originally Posted by xuantunt View Post
    Thank you for the quick reply. Maybe I need to develop version over 2kw at another prototype. With your prototype I used electronic load to test over 1200W within minutes.
    Be careful when using electronic load as no matter how much the voltage drops the load stays the same.

    If you want to build a 1000w smps then there is mine and also ludo's. This power supply has been built by a lot of DIY ers and it proves it works well. My smps can work 900w continuous and 1200w peak. It is now fitted in a 1000w amplifier.

  6. #96
    Help me fix this problem. Since I designed the buffer for 2153 with BD140, I have lost the anti-convolution function before powering. I tested it several times by giving it a short delay and then powering, FET or some other components will explode after 1-2s. Short-circuiting after power supply is still working normally. It took me more than 2 days but I didn't find a reason to fix it. If you know how to ask or help me know why and how to make it work normally. Thank you very much
    3.JPG

  7. #97
    .... Silvio's Avatar
    Join Date
    Apr 2015
    Location
    Malta
    Posts
    855
    Blog Entries
    9
    Well that is your problem my 550w smps with 700w peak is not meant to work for a 1000w. The whole set up has to be different. My smps was tailor made and I spent many hours trying to perfect it to work correctly. I post here for personal use and not for making profit. Well I am sure you will find a way of making it work.

    Xuantunt.JPG

  8. #98
    I'm quite surprised when you find that product. It took me a long time to redraw according to your principles, I distributed it in my country. Does that bother you?
    Last edited by xuantunt; 05-12-2019 at 04:23 PM.

  9. #99
    Quote Originally Posted by Silvio View Post
    Very well Sam if you have already a bit of experience then this will help you a lot. Ludo's design is more strait forward and please look for the latest version on his tread. That power supply has been built by many diyers and it proved it works.

    Regarding the core it is best to choose one with a known material as the number of turns will vary according to the material of the core used. With this you can take the best efficiency out of your smps.

    Be careful on what types of chips and mosfets you buy especially from China as some of them will be fakes. A lesson I have learned myself. For example buying an sg3525 that works well with 12v supply but as the voltage goes beyond the output waveform starts to skew and deform. Other mishaps are mosfets cannot withstand the rated load and blow off at half the specified current. Take care and buy genuine parts from a known manufacturer.

    I suggest that you take a while and read the blog posts of transformer winding practices for smps and making litz wire at home. There are other blogs that you can learn from and find them useful.

    I will help you along with any difficulties you may come by, till then

    Good luck

    Regards Silvio
    hi sir i have made this from your design there might be small changes based on my parts available, i had it with 50vdc rails using most parts from ATX psu. i do not expect high efficiency due to the parts i made and this is just for fun. i am powering my 2x100W amplifier. but i have some situation every time i shut it down/turn off the SMPS cannot be turned on again immediately and the protect led will turn on. the result was i cannot use it back again for several minutes (10-20minutes) just to discharge the caps before it will turn on again. by the way it was 2x680uf in main and 2x100k1w resistors,

    thank you
    sam 60719070_2133842980003768_4848738461928128512_n.jpg

  10. #100
    Attachment 7018
    this is based on ir2153 i am attaching the pdf later im still looking it in my HDD,

Similar Threads

  1. Replies: 28
    Last Post: 04-24-2019, 07:39 PM
  2. 700W AMPLİFİER!
    By Sierra in forum Class AB
    Replies: 44
    Last Post: 07-21-2017, 08:14 AM
  3. Another IR2153 smps
    By borysgo2 in forum diysmps
    Replies: 2
    Last Post: 04-29-2017, 10:07 AM
  4. monoblock 700W rms/2Ω
    By ultra in forum Car Audio
    Replies: 9
    Last Post: 05-29-2013, 08:06 PM
  5. Building my first AC/DC 700w SMPS
    By Adonix in forum diysmps
    Replies: 4
    Last Post: 07-20-2011, 09:24 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •