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TIDA-010210: Power Limitations

Ahmed Hussein
Prodigy 200 points
Part Number: TIDA-010210

about the used Power Half Bridges Designs in reference  "TIDA-010210"
XTIDA-ANPC-DC1 , XTIDA-ANPC-DC2 , XTIDA-ANPC-DC3

the three legs have approximately the same power ratings of power switches 600V & about 35A

Is their any limitation to use them in a design and get output current of 16-A from each leg.

In the Main Design "TIDA-010210" the output current is 10-A (on AC side). what is limiting that current from getting higher?

Is it related to the system design?
or limited to the layout design itself?

If it isn't the layout design limitation ? and each leg can deal with higher current ratings, what are the limits ?


thanks 

  • 0
    TI__Expert 3270 points

    Dear Ahmed,

    currently, the current cannot be increased because the inductors are sized for 10 A. If the current is pushed higher, inductors will saturate. I am referring to the 480 uH inductors present in the design.

    Refereed to the daughter boards:

    • DC1 is a daughter board based on SiC Cascode JFET technology
    • DC2 is a daughter board based on GaN
    • DC3 is a daughter board based on Si MOSFET

    Due to the high switching frequency working operation Si MOSFET daughter board will not be suitable (100 kHz). The daughter board based on Si MOSFET is suitable for the switches that switch at the line frequency.

    Thanks a lot for your attention

    Best regards

    Riccardo

  • 0 in reply to Riccardo Ruffo
    Prodigy 200 points

    Dear Riccardo,

    thanks for your response.

    I am talking about the daughter boards what is their limitations.

    can they reach 16A each?

  • 0
    TI__Expert 3270 points

    Dear Ahmed,

    the daughter board based on GaN technology is not able to reach 16 Arms because the current layout does not allow a higher switching speed. The maximum switching speed that we can achieve without no problem is 30 kV/us.

    Currently, this issue is addressed and we are improving the layout by keeping the same device.

    From the calculation that I made, we are going to be able to switch up to 100 kV/us with the new layout. This significant rising in the switching speed will allow the daughter board to work at 16 A operation.

    Best regards

    Riccardo