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TPS43000: TPS43000

Francisco Lauzurique1
Prodigy 40 points
Part Number: TPS43000

Hi,

I am developing a high switching frequency boost converter with GaN transistors. I was wondering if this part can drive the GaN transistors instead of a MOSFET.

In addition, I wanted to know if the part will be able of controlling the inverted output of a buck-boost, or if there is a way to get around this obstacle.

Regards,

Francisco Lazurique 

  • 0
    TI__Guru* 77035 points

    Hi Francisco,

    Thank you for posting.  What topology do you consider, and which GaN FET are you talking about?  Have you noticed the TPS43000 uses PFET for the high side and NFET for the low side?  Do you have the target high side and low side GaN FETs part numbers?   You may also consult the GaN vendor to ask for the requirements on the gate drive and see if the TPS43000 drivers are compatible.

    GaN FET 

    Thanks,

    Youhao

  • 0 in reply to Youhao Xi
    Prodigy 40 points

    Hi,

    I am trying to implement an Asynchronous Boost Topology. The following link is related to the GaN that I will be using. https://gansystems.com/wp-content/uploads/2018/02/GS66502B-DS-Rev-180213.pdf. 

    Thank you very much for all your help. Any suggestions will be well received.

  • 0 in reply to Francisco Lauzurique1
    TI__Guru* 77035 points

    Sorry I am not very familiar with this GaN FET.  Can you contact the FET vendor's technical support and ask them if the TPS4300's driver can work with their GaN?

    If you consider TI GaN FET, we can connect you to our GaN FET group expert.

    Thanks,

    Youhao

  • 0 in reply to Francisco Lauzurique1
    Intellectual 960 points

    For an asynchronous boost, driving a GaN FET like that one should be possible, but you'll have to be careful to ensure the gate drive voltage doesn't go higher than what the GaN FET can withstand (about 6V). When Vin and Vout are both above 3.6V, the NDRV voltage will be the lesser of Vin and Vout (Vin, for a boost converter). So you need to make sure your Vin always stays in the range of 4-5.5V.

    Switching performance probably won't be quite as good as a dedicated GaN gate driver, but it might be acceptable, depending on the operating frequency.

    Also TI, please stop playing dumb by pretending GaN Systems doesn't exist....

  • 0 in reply to Mike Twieg
    TI__Guru* 77035 points

    Hi Mike, 

    Thank you for posting.  There is seemingly misunderstanding about my post.  I did not pretend anything.  I used EPC GaN and that has a max 6V rating, but I am not familiar with the GaN FET which Francisco was referring to. So, it is safe to ask the vendor to double check the gate driver compatibility. 

    Again, thank you.

    Youhao