There is small correction to be made where you have the orange arrow. This should have been a 4.7k resistor instead of the diode. Take a look at
the attached image
hi sir silvio as i look for the IR2153 circuits i had found your project and i am very much interested since i had most of the components you used the only thing i wanna clarify was the CORE to be used i had GBU606, 560u400x2, 2sk2654 x2, IR2153, etc... now the cores that i have taken from junk was labeled 42x15 (1 with gap, 1 with no gap) there were also ee35 i think but i do not know the material type,,, can you suggest and guide me i am just a hobbyist but i mad several high power amps before though, just new to ClassD and SMPS, thanksView attachment 6929View attachment 6930
Hi I just wanted to tell you that switching power supplies are not simple as they seem and some care must be taken before attempting to build one. I suggest you read the SMPS warnings on the top of the page first.
You will surely need an oscilloscope and an Isolating transformer.
Regarding your ferrite core transformers we will see together what are they really are. You can search the internet regarding dismantling these cores. You can also find information and data books about ferrites and accessories to help you understand what type of cores you have.
hi sir i want to thank you for quick reply,
i am aware with the so called warnings sir i have learned safety as utmost importance, i just become interested in this SMPS thing since i it has a lot of advantages than the conventional way, i already had made some from 320volt.com with the use of atx psu's that i had been using for small audio amps,.. but these circuits are not complete...i mean no current limiter, etc... but yours are seemed to be safer my only problem was identifying the cores i had on hand but my next option was to buy ETD cores online, because my next experiments will be ludo's design.
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.
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?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 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.
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