What is the ic in this NPF970 lipo usb battery?

[alex ezorsky-lie]

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!

 

[Bluejets]

Oooo...bet that got your attention.
Not good to go shorting out electronics.
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.

 

[WHONOES]

J6B0 looks like an SMD code. There are a number of code reference publications around that may help to identify this device. See links below for some of them.

https://www.sphere.bc.ca/download/smd-codebook.pdf
http://www.s-manuals.com/smd
http://www.marsport.org.uk/smd/mainframe.htm
https://www.electroschematics.com/wp-content/uploads/2013/04/SMD-code-book.pdf
http://www.dl7avf.info/charts/smdcode/cn.html

There are many more out there. Do a Google search and see what turns up.

 

[alex ezorsky-lie]

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!