Help me identify the use of this component

[Turtulica]

It is a super tiny thing that looks to have a coil or wire inside, one of them broke. It was also magnetic.
I was trying to open the housing of this Bluetooth pair to repair a broken earbud and then I hit one of these components off.
Can I repair this by bridging the gap or will it fry something?
!!! Important: when trying to power on it does not, before knocking it off it was powering on.

 

[Nigel Goodwin]

Presumably it's an inductor, a coil of wire on a ferrite core - probably part of a buck or boost converter?. If you can repair it, exactly as it was (difficult because of the tiny size) then it should be OK. Obviously the number of turns, and the core, are both important.

 

[Turtulica]

Presumably it's an inductor, a coil of wire on a ferrite core - probably part of a buck or boost converter?. If you can repair it, exactly as it was (difficult because of the tiny size) then it should be OK. Obviously the number of turns, and the core, are both important.

Yeah, the damn thing is so small I can’t even see the connection points. So if I can’t reconnect this inductor there is no other way to fix it?

 

[Tony Stewart]

you would need a microscope, tweezers and sharp iron tip to burn the insulation coating to bond with added flux a wire to the broken wire. Chances of finding a match are slim to none unless you can measure L, DCR and guess on I max, f. There is an NFET beside it , which means it is likely what Nigel said.

 

[Turtulica]

Well, thanks for the info guys, really appreciate it. Have a nice day

 

[transconductance]

Yes, it's an inductor. No, you can't just bridge it. You would definitely have to replace it with an inductor. You might try the largest inductance you can find in that package. If it's a buck converter, a larger inductor will work. If it's a boost converter, maybe not. Inductors like that are available from Digi-Key and Mouser.

 

[Tony Stewart]

If L is too big, then DCR (=Rs) rises and may get too hot inducing a thermal runaway in the ferrite. Most likely it reduces USB 5V to charge a battery by storing switched current ramps over 1A. Circa 10 uH

 

[transconductance]

True. If it gets hot, at least it is running. Then you can measure the frequency and figure out what inductance is needed. Of course, you'll need the voltages too but if it's a USB POL regulator, then you already know that.