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UCC27714: 100% Duty Cycle - 200V - 10kHz Operation

Furkan Fehmi Sefiloglu
Expert 3118 points
Part Number: UCC27714
Other Parts Discussed in Thread: SN6505B, UCC14240-Q1, UCC25800

Hi Team,

Can you please advise with following request?

"

I was interested in this product because it can drive a 600V switch. I need a half bridge driver that can drive over 200V. However, I had to give up because I realized that it could not work at 100% duty cycle since the bootstrap structure was used in the product. I plan to continue with the product of a different company. In our application, switching will be made in the range of 200V-0V and it should be able to operate in the frequency range of DC to 10kHz. It is important to provide DC voltage (100% duty cycle) indefinitely. If you have such a product, I would like to review it.
However, if there is a chip with dead-time feature, it will be superior to the product of the other company I mentioned. dead-time can be configurable or if it is fixed, it should be <1us.

"

Thanks in advance

Best Regards

Furkan Sefiloglu

  • +1
    TI__Mastermind 20950 points

    Hello Furkan,

    The UCC27714 high side driver can operation in a DC operating condition but you are correct that with a bootstrap method for the high side floating bias the DC operation is not possible. You can use a floating high side bias solution such as SN6505b, UCC25800, or UCC14240-Q1 to generate a floating high side bias.

    Also there is an application note which shows a solution for using half bridge drivers as high side switches, the note can be found below.

    https://www.ti.com/lit/an/sluaa58/sluaa58.pdf?ts=1644509317144&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FUCC27284

    Regarding your question on a device with the dead time feature, are you asking if we have a driver with a dedicated floating high side bias feature included and also a dead time feature? At this time, we do not have both functions within our gate drivers. There may be other TI product lines which have these features, such as PSIL.

    Regards,