Help Identifying component and distributor - Page 1
Forum section: electronics / repair

author: manu
author_rank: Regular Contributor
timestamp: May 17, 2019, 12:21:34 pm
content: 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?

author: manu
author_rank: Regular Contributor
timestamp: May 21, 2019, 06:45:56 am
content: close up on the chip:

author: manu
author_rank: Regular Contributor
timestamp: May 24, 2019, 06:57:43 am
content: 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.

author: fzabkar
author_rank: Super Contributor
timestamp: June 07, 2019, 02:08:30 am
content: All I could find when searching for SY6982 was this:https://wenku.baidu.com/view/02b593b8524de518964b7dcf.htmlhttps://img.alicdn.com/imgextra/i4/2095957834/TB2XTqUhocKL1JjSZFzXXcfJXXa_!!2095957834.jpg

author: manu
author_rank: Regular Contributor
timestamp: June 07, 2019, 06:26:21 am
content: 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 ILIMAnyway, I continue searching... Thanks for your help.

author: fzabkar
author_rank: Super Contributor
timestamp: June 09, 2019, 03:23:11 am
content: Have you tried Avnet?https://www.avnet.com/shop/us/search/sy6982

author: manu
author_rank: Regular Contributor
timestamp: June 09, 2019, 01:13:53 pm
content: Yes, unfortunately no datasheet available...

author: moochinazz
author_rank: Newbie
timestamp: May 25, 2020, 06:19:10 am
content: Hi, sorry for resurrecting an old thread. Has anyone managed to find the replacement for the chip mentioned in the first post?

author: fzabkar
author_rank: Super Contributor
timestamp: May 25, 2020, 08:00:14 am
content: 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 VoltageSY6982C - Prog. Charge Current & Timer，Boost Mode Without Battery, Adaptive Input Current Limit, 4.2 / 4.35V Cell VoltageSY6982C1 - Prog. Charge Current & Timer，Fault Mode Without Battery, Adaptive Input Current Limit, 4.1 / 4.25V Cell Voltage

author: onceagain
author_rank: Newbie
timestamp: December 03, 2020, 07:15:53 am
content: Quote from: manu on June 07, 2019, 06:26:21 amHey, SY6982C is now available to buy. Do you still have that faulty speaker?

author: manu
author_rank: Regular Contributor
timestamp: December 11, 2020, 11:03:56 pm
content: Yes I still have it, where can I buy it?

author: manu
author_rank: Regular Contributor
timestamp: December 11, 2020, 11:07:52 pm
content: For some reason, I am not notified anymore when someone posts on this thread...