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BQ25120A: Triggering MR doesn't generate pulse on RESET pin

Part Number: BQ25120A

We are pulling MR down and holding it down for more than T_RESET. However, the RESET output pin doesn't generate the pulse it is supposed to (per datasheet). It just stays high the whole time.

Any ideas what might be going on?

  • Yuri,

    Are you holding /MR for the treset duration?

    Can you share a plot and schematic?

    thanks,

    Gautham

  • Hi Gautham,

    We figured what the issue was. We were using a Hall Switch to trigger MR. However, we used the hall switch in a push-pull config which doesn't work. We switch it to an open drain (more like a push button) hall switch and it all started working.

    We now have a different issue. I will start a different thread.

    Thanks for the help
    -Yuri