Futterama
Member
Hi forum,
I'm building an isolated DC/DC converter using the LT3999 push-pull driver and a Würth 749196301 SMPS transformer:
https://www.linear.com/product/LT3999
https://katalog.we-online.de/pbs/datasheet/749196301.pdf
I would like to connect the IC and transformer with lowest possible parasitic inductance/capacitance, but I need some advise for this.
Look at the attached drawing. The LT3999 is alternately switching the two pins to GND. The transformer is built as the red symbols indicate. The pink lines are the necessary connections between pins. The direct connection between two transformer pins is connected to the positive input supply.
So how should the PCB traces be routed to minimise parasitic inductance/capacitance? I have 2 PCB layers at my disposal. I'm thinking the currents should run is opposite directions on each side of the PCB to minimise inductance, but I just can't wrap my head around this.
Thanks.
Best regards,
Martin
I'm building an isolated DC/DC converter using the LT3999 push-pull driver and a Würth 749196301 SMPS transformer:
https://www.linear.com/product/LT3999
https://katalog.we-online.de/pbs/datasheet/749196301.pdf
I would like to connect the IC and transformer with lowest possible parasitic inductance/capacitance, but I need some advise for this.
Look at the attached drawing. The LT3999 is alternately switching the two pins to GND. The transformer is built as the red symbols indicate. The pink lines are the necessary connections between pins. The direct connection between two transformer pins is connected to the positive input supply.
So how should the PCB traces be routed to minimise parasitic inductance/capacitance? I have 2 PCB layers at my disposal. I'm thinking the currents should run is opposite directions on each side of the PCB to minimise inductance, but I just can't wrap my head around this.
Thanks.
Best regards,
Martin