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UC1711 Replacement

Leonid Eremeev
Prodigy 60 points
Other Parts Discussed in Thread: UCC27423, UCC27323, UCC27624, UC1708-SP

Hi. Could you please recommend a drop in replacement to the discontinued PN UC1711J/883BC (Unitrode was acquired by TI)? If a drop in replacement is not available, could you please suggest replacements with similar electrical characteristics, radiation tolerance, and YTEOL of 5 or more. Thank you.

  • 0
    TI__Expert 4070 points

    Hi Leonid,

    Thanks for reaching out!

    ------

    Yes, you are correct, Unitrode was acquired by TI!  The best drop-in replacement we have is the UCC27323, but it is currently out of stock (on TI.com) for the PDIP package that you are likely looking for.  The UCC27423 is also pin-to-pin, but has ENABLE pins where the N/C pins are, but the EN pins can be floated if needed, as they are internally pulled up to VDD.  The PDIP package is currently in stock for the UCC27423.

    The largest difference in electrical characteristics is the drive strength.  Rather than 1.5A of drive strength, both the UCC27423 and UCC27323 have 4A of drive strength.  So, higher value gate resistors may be needed to achieve the same drive strength as before.

    -------

    Please let me know if this answered your question by pressing the green button, otherwise, please feel free to follow up!

    Thanks!

    Aaron Grgurich 

  • 0 in reply to Aaron Grgurich
    Prodigy 60 points

    Aaron, thank you for the response. Pin-to-pin compatibility with ENABLE input floating is neat, but my main concern with UCC27323 and UCC27423 is the max Vdd of 15 V while the discontinued UC1711 supported Vdd = 35 V. What about PNs UCC27624 or 5962-0051401VPA (aka PN UC1708-SP)? Yes, looking for a PDIP(8) package. Thank you

  • +1 in reply to Aaron Grgurich
    TI__Expert 4070 points

    Hi Leonid,

    To add on and address the radiation tolerance concern, we may also want to consider one of our parts with Military / Space ratings:

    Please also look at our selection of Military / Space grade gate drivers.  I have filtered them with this link.

    Thanks,

    Aaron Grgurich