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IR2153 smps with short circuit protection.
- Thread starter norazmi
- Start date
Demikiko,
I don't like the formulas either!
But these formulas always save our time.
I don't think that you want to reinvent the wheel right? So, think about it.
I often use simple bulbs instead of resistors.
You can "see" the results faster.
BTW: A good core and easy to find for your applications is the EE42/20 without gap.
And don't forget the skin efect on the wires.
Try to read more about...
Regards,
Marcos Bettecher
I don't like the formulas either!
But these formulas always save our time.
I don't think that you want to reinvent the wheel right? So, think about it.
I often use simple bulbs instead of resistors.
You can "see" the results faster.
BTW: A good core and easy to find for your applications is the EE42/20 without gap.
And don't forget the skin efect on the wires.
Try to read more about...
Regards,
Marcos Bettecher
Marcos,
Yes of course I really don't want to reinvent the previously invented one.
Mine is just to try things but with carefulness..
I've used formulas and I'm sure no one can escape without using them...
but what I know are just the simple and practical formulas
It is only you that told me about the Ap and other things related to that..
maybe it is about time for me to consider your advice..
My problem is EE42/20 without gap is difficult to find here in our place..
don't worry I know what is skin effect..
I chose to use power resistor because bulb can make my eyes
to have blurred vision..
Anyway thanks for your time again....My intention is just to discover junked components
to make them useful in smps..despite the fact that spms is not an easy thing..
Regards,
Demykiko
Yes of course I really don't want to reinvent the previously invented one.
Mine is just to try things but with carefulness..
I've used formulas and I'm sure no one can escape without using them...
but what I know are just the simple and practical formulas
It is only you that told me about the Ap and other things related to that..
maybe it is about time for me to consider your advice..
My problem is EE42/20 without gap is difficult to find here in our place..
don't worry I know what is skin effect..
I chose to use power resistor because bulb can make my eyes
to have blurred vision..
Anyway thanks for your time again....My intention is just to discover junked components
to make them useful in smps..despite the fact that spms is not an easy thing..
Regards,
Demykiko
Marcos,
Yes of course I really don't want to reinvent the previously invented one.
Mine is just to try things but with carefulness..
I've used formulas and I'm sure no one can escape without using them...
but what I know are just the simple and practical formulas
It is only you that told me about the Ap and other things related to that..
maybe it is about time for me to consider your advice..
My problem is EE42/20 without gap is difficult to find here in our place..
don't worry I know what is skin effect..
I chose to use power resistor because bulb can make my eyes
to have blurred vision..
Anyway thanks for your time again....My intention is just to discover junked components
to make them useful in smps..despite the fact that spms is not an easy thing..
Regards,
Demykiko
Yes of course I really don't want to reinvent the previously invented one.
Mine is just to try things but with carefulness..
I've used formulas and I'm sure no one can escape without using them...
but what I know are just the simple and practical formulas
It is only you that told me about the Ap and other things related to that..
maybe it is about time for me to consider your advice..
My problem is EE42/20 without gap is difficult to find here in our place..
don't worry I know what is skin effect..
I chose to use power resistor because bulb can make my eyes
to have blurred vision..
Anyway thanks for your time again....My intention is just to discover junked components
to make them useful in smps..despite the fact that spms is not an easy thing..
Regards,
Demykiko
Demikiko,
Since you don't have available these cores, consider to stacking cores like EI 35 or EI 33 from computers smps. I found a smps on internet using this trick.
The only problem is the reel but you can make by using a thin plastic or pvc sheets.
Warming regards,
Marcos
Since you don't have available these cores, consider to stacking cores like EI 35 or EI 33 from computers smps. I found a smps on internet using this trick.
The only problem is the reel but you can make by using a thin plastic or pvc sheets.
Warming regards,
Marcos
Marcos,
Yes I will follow your advice as soon as I can obtain at least two pieces of EI 35 or EI 33.
I just have only one now which I've been using for testing purposes.
You are right the one big problem is the bobbin or reel on which the winding is done..
and one more thing, I'm not successful in applying protection circuit to IR2153
during my recently assembled test rig testing..
I'm still on the process of knowing the reason why..in my own design protection circuit..
But still if I cannot make it successfully, I will have to adopt what is given here in diysmps
Thanks a lot for your tip.
Warm regards,
Demykiko
Yes I will follow your advice as soon as I can obtain at least two pieces of EI 35 or EI 33.
I just have only one now which I've been using for testing purposes.
You are right the one big problem is the bobbin or reel on which the winding is done..
and one more thing, I'm not successful in applying protection circuit to IR2153
during my recently assembled test rig testing..
I'm still on the process of knowing the reason why..in my own design protection circuit..
But still if I cannot make it successfully, I will have to adopt what is given here in diysmps
Thanks a lot for your tip.
Warm regards,
Demykiko
Marcos,
Thank for those diagram and pic..
I will do first the protection circuit but I have to find first the right transformer as current sense transfo..
and do some trial and error in winding the pri and sec..
I understand in this forum that 1 pri turn is enough so my focus will be the sec no. of turns to arrive at
correct voltage that will turn on the scr and do the shutdown for IR2153..
Thanks and Regards,
Demykiko
Thank for those diagram and pic..
I will do first the protection circuit but I have to find first the right transformer as current sense transfo..
and do some trial and error in winding the pri and sec..
I understand in this forum that 1 pri turn is enough so my focus will be the sec no. of turns to arrive at
correct voltage that will turn on the scr and do the shutdown for IR2153..
Thanks and Regards,
Demykiko
I have EI33 and EI35 core and bobbin. I bought them from aliexpress together, so I don't know which one is which! From specs it looks like EI33 is thicker than EI35. Overall EI33 looks bigger. Is that the way it should be? I was under the impression that EI35 would be bigger and better! If I use any of these cores for this circuit, will the windings be the same? Can anyone please clarify this for me?
That's the big problem with ferrite cores's manufacturers.
The only way to know each particular core parameters is by looking their datasheets and compare de geometry. They have many different types and shapes, but for sure you can find on the net.
The most important parameter is the Ae (Effective Area) because is directly related to the power. See the table below, maybe solve your problem.
Regards,
Marcos Bettecher
The only way to know each particular core parameters is by looking their datasheets and compare de geometry. They have many different types and shapes, but for sure you can find on the net.
The most important parameter is the Ae (Effective Area) because is directly related to the power. See the table below, maybe solve your problem.
Regards,
Marcos Bettecher
Attachments
That's the big problem with ferrite cores's manufacturers.
The only way to know each particular core parameters is by looking their datasheets and compare de geometry. They have many different types and shapes, but for sure you can find on the net.
The most important parameter is the Ae (Effective Area) because is directly related to the power. See the table below, maybe solve your problem.
Regards,
Marcos Bettecher
Thank you, Marcos.
Perfect!
Being totally new to SMPS, I am trying to understand the circuit.
What is the purpose of the small value (10 ohm) resistor between IR2153 and MOSFET along with FR104? Only reason I can think of is that the resistor will slightly slow down the turn-ON time and diodes make turn-OFF abrupt. This might avoid turning on the two MOSFETs at the same time. If that were correct, I see that functional equivalent schematic of IR2153 shows that it does have delay circuits inside.
Can any one please educate me?
Thanks
What is the purpose of the small value (10 ohm) resistor between IR2153 and MOSFET along with FR104? Only reason I can think of is that the resistor will slightly slow down the turn-ON time and diodes make turn-OFF abrupt. This might avoid turning on the two MOSFETs at the same time. If that were correct, I see that functional equivalent schematic of IR2153 shows that it does have delay circuits inside.
Can any one please educate me?
Thanks
Yes, (10 ohm) resistor between IR2153 and MOSFET is correct and will protect
IR2153, but against to blow up only.
If you increase the resistor to 100 ohm you will have problems with the gate charge on mosfets.
(Less power and more heat for high frequencies). Keep 10 ohm !
Regards,
Marcos
IR2153, but against to blow up only.
If you increase the resistor to 100 ohm you will have problems with the gate charge on mosfets.
(Less power and more heat for high frequencies). Keep 10 ohm !
Regards,
Marcos