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Lo Vce Equivalent replacement for ULN2003

  • 12-03-2018 1:38am
    #1
    whizbang
    Registered Users, Registered Users 2 Posts: 1,974 ✭✭✭


    A 5v application, uses one of these 2003 open collector drivers for a bunch of relays.

    But the 2003 has a Vce Sat of >0.85V in this application, which is too high to reliably drive the relays.

    Ideally need a pin-pin compatible 7channel lo side driver/switch with low Rds/Vsat

    Have looked at TPL7407 - 5v is too low. TBD62003 has similar Vds to 2003..

    Any suggestions thanks ?


Comments

  • #2
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    Ask here.
    Chances of a suitable answer are a few orders of magnitude higher.


  • #3
    whizbang
    Registered Users, Registered Users 2 Posts: 1,974 ✭✭✭whizbang


    Thanks, will do.


  • #4
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    The problem is these are based on a darlington transistor, which can't be saturated. Ideally if you can find a mosfet equivalent, that should do the job for you.


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