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What is the ic in this NPF970 lipo usb battery?

Discussion in 'Power Electronics' started by alex ezorsky-lie, Mar 16, 2020.

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  1. alex ezorsky-lie

    alex ezorsky-lie

    24
    0
    Aug 27, 2015
    So I bought this NPF970 battery with a usb module and tried drawing the max current (over 5A) in order to test an LED project. The batteries overcurrent protection shut down the battery but didn't turn the battery back on. I opened the battery and saw that there was a battery PCB and a separate usb/battery-level PCB. I found that the battery PCB wasn’t outputting to the other usb/battery-level PCB so I temporarily bypassed the battery PCB (see picture with scissors (it had common + so i jumped the -)). To my surprise this not only turned on the usb/battery-level PCB but also got the battery PCB working again so the battery works! So spread the word if your usb/NPF stops working!

    But on a second battery of the same module I once again overdischarged it and to reset it accidentally I held the bypass too long and popped an ic on the USB/battery-level PCB. The battery still works but I’d love help identifying it in case I can replace it. It’s a small 6pin with the code J6B0 and cant find it online (see photo).

    If anyone wants to lend me their thoughts on why the battery PCB didn’t automatically turn back on when disconnected from the load that would be cool too. (My simpler non-USB NPF batteries shut down when overcharged and then turn back on automatically)

    Thanks!
     

    Attached Files:

  2. Bluejets

    Bluejets

    3,764
    781
    Oct 5, 2014
    Oooo...bet that got your attention.:eek:
    Not good to go shorting out electronics.:oops:
    Possibly a proprietary line product from the battery manufacturer if none visible on the net.
    Something to do with battery protection I imagine.
    Quite possibly took out other bits at the same time that are not so obvious.
     
  3. WHONOES

    WHONOES

    774
    168
    May 20, 2017
  4. alex ezorsky-lie

    alex ezorsky-lie

    24
    0
    Aug 27, 2015
    Unfortunately I can't find one in these tables that's 6pin. I've figured out that it has something to do with the USB output, so probably something to do with voltage step down. But thanks anyway!
     
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