Gate drive transformer only rated 80VAC

[cupoftea]

Hi
We wish to use the 760301302 gate drive transformer for our two transistor forward. (373VDC input) It says (below)
its ok for 250Vrms operation and so should be OK.

WE-GDTI Gate-Drive-Transformer | Passive Components | Würth Elektronik Product Catalog

n 1:1:1 to 3:1:1 | ∫Udt 99 to 140 µVs | Order Samples Free of Charge & Request Quotes Online | High Quality | Fast Delivery

www.we-online.com

However , its datasheet says its only rated for 80vac.

760301302 datasheet:

https://www.we-online.com/components/products/datasheet/760301302.pdf

Do you know which we can believe?

Attached is the 2 tran fwd sim in LTspice, and its also in PNG.

 

[cupoftea]

Hi, Also on same subject.....
As per the following,

Pulse transformer rating exceeded?

hello, i wish to use this pulse transformer to turn a mosfet on and off in a SMPS. https://www.farnell.com/datasheets/85907.pdf (i wish to use the 1:1 one, top line) Unfortunately, near the top, it says that its Maximum Pulse current is 200mA. This appears to be bad for me as a MOSFET is...

www.edaboard.com

ive always taken it that eg pulse transformer primary FET drive for 2 Tran forward with say 400VDC input was to be done with interleave winding and not bifilar. Would you agree? (bifilar = bad because too high capacitance and too mch voltage stress to coils.
As you know, even then one is right at the limit of low leakage inductance possibility.

 

[Easy peasy]

Read the whole data sheet:

It is rated for 102 V.uS, at 80V max on any wdg, in this case only for 1.275uS each way - with presumably lots of dead time in between ( else core losses ) - these 2 ratings ( 80V & 102V.uS ) show you the limit for pulse applications

It should be fine for 400V high side GD - the 4 uH leakage is a pointer to the fact there is some insulation between pri and sec.

 

[cupoftea]

Thanks,, i hadnt even started to think that they would consider the gate drive input being needed for any more than a normal FET or SiCFET drive...ie, 20V max.
But yes i suppose some applications will have people shovelling an 80V pulse through the transformer. -Thankyou