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Part Number: LMG5200POLEVM-10
The User Manual of the EVM explains:
The converter topology and transformer turns ratio (5:1) restricts the maximum output voltage to be 1/20th of the input voltage.
In that manual, there are two windings visible in the top and bottom layer.
How is the 5:1 ratio achieved in that design?
thanks for the interest, that is a very good question.
The planar transformer is build on a 10 layer board, with layers 1,4,5,7,10 dedicated to the secondary side (each one turn in parallel) and the other to the primary side (one turn each in series).
The stacking goes S PP SS P S PP S (S=secondary P= primary).
Please reference to the picture below.
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