• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 62 subscribers
  • Views 715 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS22976: Use in OR-ing two supplies?

Carmen Parisi
Expert 4060 points
Part Number: TPS22976
Other Parts Discussed in Thread: TPS22912C, TPS22910A, TPS2113A, TPS2115A

In the process of designing a circuit for an app note and was wondering, is there anything wrong with using the TPS22976 as a simple way to OR two supplies? The datasheet says that both channels can be put in parallel but I'd prefer two inputs and one common output. This is a low current application (<100mA) and one of these ICs is way cheaper than two TPS2419s.

Thanks,

Carmen

  • 0
    TI__Genius 15710 points

    Hi Carmen,

    The TPS22976 does not offer any reverse current blocking when turned off. This means that if one of the supplies is higher than the other, then when that supply is powering the system there will be current flowing backwards into the lower voltage supply. For more information on this and all recommended power muxing configurations with load switches, check out this app note! Specifically, I would recommend taking a look at the TPS22910A + TPS22912C configuration for your application.

    If you are looking for a single chip solution, then the TPS2115A or TPS2113A are good options.

    Let me know if you have any questions.

    Thanks,

    Alek Kaknevicius 

  • 0 in reply to Aleksandras_Kaknevicius
    TI__Expert 4060 points
    Thanks Alek! Appreciate the help. I'll check out the links you recommended.

    Carmen