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TPS24772: eFuse as output protection

Clive Bolton
Prodigy 20 points
Part Number: TPS24772

(1) Can the TPS24772 eFuse be used to protect an output? My system powers four external probes over a long cable. I need to protect the system power outputs against wiring faults to make sure that one wiring fault doesn't hurt the system or interfere with the other probes.

(2) Is there a way to force a retry after a Fast Latch Off event? Page 13 of the datasheet shows that there is no retry.

Could a retry be forced by shorting ENHIS to GND, or by shorting one of the timer pins to GND?

(3) Can theTPS24772 be used as a load switch by pulling ENHIS to GND?

Thanks!

  • 0
    TI__Mastermind 38910 points

    Hi Clive,

    Welcome to E2E !!! Thanks for your interest on TI eFuse and hot swap controllers. We will get back to you by today end of the day.

  • 0 in reply to Avishek Pal
    TI__Mastermind 38910 points

    Hi Clive,

    Please see our responses in the order of your queries.

    1) TPS2477x devices can't be used to protect an output against the faults due to cable miss wirings. Because, this family of devices don't have the input or output reverse polarity protection features. Please could you share the specifications and a block level diagram of your system to come up with the appropriate solution.

    2) A retry could be forced after recycling the voltage at ENHS pin. After the fast latched off, If there is a rising edge on ENHS the part will discharge the timers and go to the inrush mode again to initiate the startup process.

    3) TPS2477x can't be used as a load switch by pulling ENHS to GND as it disables the device.