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UCC27311A-Q1: non-isolated gate driver with deadtime

Ryan Rah
Prodigy 180 points
Part Number: UCC27311A-Q1
Other Parts Discussed in Thread: UCC27301A-Q1, UCC27712-Q1, LM5105

Tool/software:

Has UCC27311 inherent deadtime feature? If yes, what is the value?

If no, Is there any TI non-isolated, Automotive 120V half-bridge gate driver IC with fixed or adjustable deadtime feature with it?

  • 0
    TI__Genius 14145 points

    Hey Ryan,

    Thank you for reaching out with your questions about the UCC27311A-Q1.

    We do not have a 120V Automotive Half-Bridge driver with fixed or adjustable deadtime currently. The UCC27301A-Q1 is offered with input interlock for cross conduction protection and is the same family as the UCC27311A-Q1.

    We do have the UCC27712-Q1 which is a 700V half-bridge driver that has fixed deadtime and interlock.

    For non-automotive parts with adjustable or fixed deadtime, we have a few options in the LM510x family such as the LM5105 that used an RDT pin for adjustable deadtime but is not automotive qualified.

    Let me know if there are further questions about any of these parts.

    Thank you,

    William Moore

  • 0 in reply to William Moore
    Prodigy 180 points

    Thanks for the reply!
    Using UCC27712-Q1 which is rated 700V for maximum 100V application has a negative impact on it?
    Since it has only 2.8-A Sink, 1.8-A Source current, can it be used to drive two parallel N-MOSFETs both in high side and low side?

  • 0 in reply to Ryan Rah
    TI__Genius 14145 points

    Hey Ryan,

    Having a 700V driver will not negatively impact the system. It just provides more overhead for the ratings of the high voltage pins.

    Having two parallel FETs on each channel is acceptable with the UCC27712-Q1. The gate resistances can be adjusted to help with rise and fall times.

    Let me know if there are further questions.

    Thank you,

    William Moore

  • 0 in reply to William Moore
    Prodigy 180 points

    There is a confusing part in UCC27301 datasheet! 
    what are the source and sink current values?

  • +1 in reply to Ryan Rah
    TI__Genius 14145 points

    Hey Ryan,

    Thank you for pointing this out. This appears to be a typo in the Features section of the datasheet. I will make note so that this gets fixed with the next datasheet revision.

    The UCC273x1A has 3.7A source (pullup) and 4.5A sink (pulldown) current.

    Thank you,

    William Moore