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Current control TPS25944A

VT
Genius 3300 points
Other Parts Discussed in Thread: TPS25944A, TPS25942L

1. I have a application where current should be limited to 5A. As soon as current increases than this, ckt should shut down supply & then auto retry. Input voltage is 9V-16.8V max. Also there should be no reverse current flow in the circuit.

2. I think TPS25944A is good fit for this application. Only issue is it make the cut aboive 5A current by thermal shutdown. So if current incrreases then 5A then its thermal temeprature will start increases & at particular temeprature it will make a cut & the retry again.
Is there any method/IC in which there is cut on above 5A & then retry after every 10 sec or so??

  • 0
    TI__Mastermind 42795 points
    Hello. I'm moving this to the load switch forum.
  • 0
    TI__Guru** 105361 points

    Hi Takniki,

    TPS25944A has fixed retry interval of 128ms (typ).

    You can achieve required retry interval using external micro-controller as follows.

    1. Use a latched device like TPS25942L.

    2. When shutdown happens, device gets latched (remains off). The Fault pin gets asserted active low. Use this information to start timer in your micro-controller

    3. Once the timer reaches required retry internal (say 10sec), reset the device TPS25942L through EN/UVLO pin as shown below

    Best Regards,

    Rakesh