fireant007
Member
Hi all,
I have got hold of a program from st.com which will let you roll your own SMPS.
Is does nothing except give you a schematic and I am fully aware that there are many many hurdles to over come when laying out and optimising these circuits.
The program has recommended a transformer.
The program suggests using a EER40 core and winding the following.
39 Primary windings of 3 paralleled Litz 27x0.079mm wire.
There is of course a secondary and in this case an auxiliary.
When they say 38 windings in parallel .. do they mean running 3 lengths of wire round the bobbin at the same time ? And join them all at each end.
Not parallel in the electrical sense of transformers in parallel or series ?
The program does not give you much. So I am going to assume that the windings are just wound over the top of each other with sufficient Mylar tape between windings to insulate and eliminate creepage to the required amount ?
I have got hold of a program from st.com which will let you roll your own SMPS.
Is does nothing except give you a schematic and I am fully aware that there are many many hurdles to over come when laying out and optimising these circuits.
The program has recommended a transformer.
The program suggests using a EER40 core and winding the following.
39 Primary windings of 3 paralleled Litz 27x0.079mm wire.
There is of course a secondary and in this case an auxiliary.
When they say 38 windings in parallel .. do they mean running 3 lengths of wire round the bobbin at the same time ? And join them all at each end.
Not parallel in the electrical sense of transformers in parallel or series ?
The program does not give you much. So I am going to assume that the windings are just wound over the top of each other with sufficient Mylar tape between windings to insulate and eliminate creepage to the required amount ?