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UCC27714 Anti Shoot-through

Bob Pham
Prodigy 50 points
Other Parts Discussed in Thread: UCC27714

The datasheet shows Figure 41 of the output structure which includes an anti shoot-thru circuitry.  The text fails to mention this figure.  The functional block diagram does not show anti shoot-thru.  How does the anti shoot-thru circuitry work?  Thank you.

  • 0
    TI__Mastermind 34465 points
    I will contact the systems engineer for this part and get back to you.
    Thank you for reporting this discrepancy.
    Regards,
    John Griffin
  • 0
    TI__Genius 9790 points
    Hi, Bob

    The shoot- through circuitry is internal logic to eliminate any shoot-through in the output driver stage, it’s not like the shoot-through protection between HO and LO. The UCC27714 does not include internal cross-conduction prevention logic between HO and LO, it allows both HO and LO outputs to be turned on simultaneously.

    Yunsheng
  • 0 in reply to Yunsheng Qu
    Prodigy 50 points
    Thank you, Yunsheng, for clearing that up. A few more questions:

    1. What is the isolation between VSS and COM? in terms of voltage
    2. If I drive HI and LI from a controller and do not connect COM and VSS, will that work?
    3. Is there any future plan to make a rad-hard version of this? We are the prime contractor for NASA to design & build the next space suit.
    4. What other comparable gate drivers have independent HI, LI inputs with cross conduction and desat protections?

    Many thanks,

    Bob Pham
  • 0 in reply to Bob Pham
    TI__Genius 9790 points
    Hi, Bob

    1. What is the isolation between VSS and COM? in terms of voltage
    -6V to 5V
    2. If I drive HI and LI from a controller and do not connect COM and VSS, will that work?
    No, COM and VSS should connect together or low resistance
    3. Is there any future plan to make a rad-hard version of this? We are the prime contractor for NASA to design & build the next space suit.
    please check with Fundaro, Peter <peter_fundaro@ti.com> who is system manger of HPDS
    4. What other comparable gate drivers have independent HI, LI inputs with cross conduction and desat protections?
    for 600V driver, UCC27714 is the only one chioce in TI, also you can check with Fundaro, Peter <peter_fundaro@ti.com>

    Regards,
    Yunsheng