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UCC27517: Driving a pulse transformer for two transistor forward drive

Part Number: UCC27517
Other Parts Discussed in Thread: UCC27714, UCC27624

Hi,

Do you have any good gate drive ics for driving a pulse transformer of a two tran forward?

As you know, their can be inductive kickbaks.

  • Hi,

    Our office is currently closed for the US Memorial Day holiday.

    My colleague will reply to you shortly after we are back in office.

    Best regards,

    Don

  • Hi Andrew,

    I usually see this in a half-bridge topology, so I think UCC27714 would be a good choice. Many half-bridge drivers have logic that prevents HO and LO being on simultaneously, but this part doesn't have that, so it can work for this. 

    It also specs the HS transients for certain durations. You may need a special setup to use the bootstrap circuit, or just use a floating bias supply. There is a circuit shown in the UCC27714 datasheet, but as someone on E2E pointed out, it has an issue. 

    Another option would be to use a dual channel isolated driver, which can handle a lot of voltage transients. 

    Lastly, if you are talking about driving the FETs using a pulse transformer, you could do something like this:

    If the dot on the bottom leg was reversed. For this purpose, you can use a low-side driver such as UCC27624. I just wanted to mention this in case this is what you meant.

    Let me know if you have any follow-up questions or need more details. A drawing of your planned topology would also help me know exactly what approach you are looking at.

    Thanks,

    Alex M.