MyFirstSMPS
New member
I found today some time and did a new Current Transformer and replace some of a damaged components on PCB, tomorrow I hope test my SMPS again.
In addition, I found the one unforgivable failure, which I have previously unnoticed.
Namely, the old Current Transformer windings connected to wrong way, perhaps there is also the opportunity - why destroyed MOSFETs and IR2153 itself?
Below picture of this connection scheme.
And it is interesting that, in this case worked for my SMPS until the outputs connected in series and loaded. Independent output and loading of them is not influenced by the work of SMPS even ~240V main power.
Based on this false association could say that the IR2153 is a fairly durable IC than in this situation, even a short time can work:"::. As the diagram shows it was one of my current transformer secondary windings is essentially short-circuit winding, therefore no C/T - there was only one winding in use((@.
Now this problem is eliminated, based on the bad experience with Power Transformer, Current Transformer also got better insulation (PTFE). Windings consisting of a double varnish and additional layer of silk-fiber 0,26mm copper wire which before was produced mainly in the high-frequency inductive coils.
Power Transformer inductance is also lower now than it was last - measured 4.793 mH (milli-Henry) is now
I hope this new design is better now:w)?
In addition, I found the one unforgivable failure, which I have previously unnoticed.
Namely, the old Current Transformer windings connected to wrong way, perhaps there is also the opportunity - why destroyed MOSFETs and IR2153 itself?
Below picture of this connection scheme.
And it is interesting that, in this case worked for my SMPS until the outputs connected in series and loaded. Independent output and loading of them is not influenced by the work of SMPS even ~240V main power.
Based on this false association could say that the IR2153 is a fairly durable IC than in this situation, even a short time can work:"::. As the diagram shows it was one of my current transformer secondary windings is essentially short-circuit winding, therefore no C/T - there was only one winding in use((@.
Now this problem is eliminated, based on the bad experience with Power Transformer, Current Transformer also got better insulation (PTFE). Windings consisting of a double varnish and additional layer of silk-fiber 0,26mm copper wire which before was produced mainly in the high-frequency inductive coils.
Power Transformer inductance is also lower now than it was last - measured 4.793 mH (milli-Henry) is now
I hope this new design is better now:w)?