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Primary to secondary coupling in Current sense transformer

Flyback

Well-Known Member
Hi,
Doing Current sense transformer for 1000W Boost PFC with UCC28070A.
E20/10/6 core
Primary = one turn of TEX-ELZ 7/0.3mm
Secondary = 50 turns of 0.2mm TEX-E

Is the primary to secondary coupling good enough in the attached? (seen from four angles)
 

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ronsimpson

Well-Known Member
Most Helpful Member
I cannot see what insulation is on the 1T. I might use Tripple insulated wire. Will that winding move if force is applied? The isolation should be as good as any Primary to Secondary windings.
 

Flyback

Well-Known Member
Thanks, yes it could move, though this is prototype only, just to demo 180V at 2kW and nothing else. The use is as on pg 1 of the UCC28070A datasheet.
UCC28070A

I tried to do another CST with ECW, but its horrendous to solder to the pads on the PCB....The TEX-ELZ TIW is solderable and was far easier to terminate.

As you know, TEX-E and TEX-ELZ are triple insulated wires.
 

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