Help Identifying component and distributor

[manu]

Hi,

I have a bluetooth Sony portable speaker SRS-XB20 which cannot charge its 2-cell 7.2V Li-ion battery.

The culrpit is probably this chip marked ASV7EA. I think it should boosts (when working!) the 5V USB to 8.3V and charge the battery.
It's probably a Silergy chip, some kind of step-up or battery charger ic.
The ref I have a datasheet for is a SY21282 but some pins don't match with what is populated on the pcb.

Does somebody know what ref is corresponding to the ASVxxx marking?

[manu]

close up on the chip:

[manu]

It seems to be SY6982 but the marking doesn't fit (the pinout does).
If someone have access to the SY6982A, it would be nice.

[fzabkar]

All I could find when searching for SY6982 was this:

https://wenku.baidu.com/view/02b593b8524de518964b7dcf.html
https://img.alicdn.com/imgextra/i4/2095957834/TB2XTqUhocKL1JjSZFzXXcfJXXa_!!2095957834.jpg

[manu]

thanks,
it seems the ASV is some kind of variant as pin 5 & 6 are grounded.

I tried a SY6982E (from LCSC) and it doesn't work (because pin 6 is Vin sense and obviously must not be grounded to work properly).
SY6982C could work because pin 6 is ILIM

Anyway, I continue searching... Thanks for your help.

 

[fzabkar]

Have you tried Avnet?

https://www.avnet.com/shop/us/search/sy6982

[manu]

Yes, unfortunately no datasheet available...

[moochinazz]

Hi, sorry for resurrecting an old thread. Has anyone managed to find the replacement for the chip mentioned in the first post?

[fzabkar]

This is all I managed to find:

http://web.archive.org/web/20180920172840/http://s.no4e.com:80/143/3d0d05ba2c9213a0/resource/7d56632628fb93ab31ccfecea7272397.pdf (2014, Q2, product list)

http://www.szyucan.com/upfile/IC-PDF/SY6982E.pdf (SY6982E)
https://datasheet.lcsc.com/szlcsc/1809191920_Silergy-Corp-SY6982EQDC_C108510.pdf (SY6982E)

http://forum.fonarevka.ru/attachment.php/attachmentid=189921&d=1498199051 (SY6982C)

SY6982A - Prog. Charge Current & Timer， Fault Mode Without Battery, Adaptive Input Current Limit, 4.1 / 4.2 / 4.3 / 4.35V Cell Voltage

SY6982C - Prog. Charge Current & Timer，Boost Mode Without Battery, Adaptive Input Current Limit, 4.2 / 4.35V Cell Voltage

SY6982C1 - Prog. Charge Current & Timer，Fault Mode Without Battery, Adaptive Input Current Limit, 4.1 / 4.25V Cell Voltage

[onceagain]

SY6982C could work because pin 6 is ILIM

Hey, SY6982C is now available to buy. Do you still have that faulty speaker?

[manu]

Yes I still have it, where can I buy it?

[manu]

For some reason, I am not notified anymore when someone posts on this thread...