Gate Drive Transformer

[microsim444]

I am building a gate drive transformer, for a HALF BRIDGE power supply, the A-AND-T-LABS power supply, www.a-and-t-labs.com

Since the company as it looks, is closed down, they are no longer responding to e-mails, however

I decided to build the power supply from scratch, I have all the parts now, assembled the PCB, all OK.

The only problem I have is the GATE DRIVE Transformer.
winding as follows

14 Turns Primary
12 Turns Secondary 1
12 Turns Secondary 2
12 Turns Secondary 3
12 Turns Secondary 4

The core I am using is specially designed for GDT, form Coilws.com
with AL6000.

Each secondary will drive a MOSFET IRFP450. to make 2 mosfets out phase 180 degree with the other 2 mosfets.

I am unable to make Secondary 1 and Secondary 3
180 Degree OUT OF PHASE with Secondary 2 Secondary 4


I tried to wind in deference ways, but I failed to make it work

ANY help with this issue is more than appreciated.

how to wind it in the right way to accomplish that!?

THANKS

 

[ace7one]

The only way to make them 180 degrees out of phase is to flip the "polarity" of the outputs.