TIDM-02002: The parameters of the transformer need to be simulated and calculated. How to choose the value?

Hi Team,

Here's an issue from the customer may need your help:

Parameter calculation

LP is the primary winding inductance measured with the secondary winding disconnected.
LR1 is the primary winding series/leakage inductance measured with the secondary winding shorted.
LR2 is the secondary winding series/leakage inductance measured with the primary winding shorted.

PMP21999 can be found at the following link:https://www.ti.com/tool/PMP21999

For PMP21495 transformer, LP=25uH, LR1=1.5uH, LR2=0.585uH, NP:NS = 8:5.

LP, LR1, LR2, if measured according to the above method, according to the calculation of the T-shaped transformer, the inductance value will be negative: