Author Topic: Help Identifying component and distributor  (Read 846 times)

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Offline manu

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Help Identifying component and distributor
« on: May 17, 2019, 12:21:34 pm »
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?
« Last Edit: June 06, 2019, 11:57:40 pm by manu »
 

Offline manu

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Re: Help Identifying component and distributor
« Reply #1 on: May 21, 2019, 06:45:56 am »
close up on the chip:
 

Offline manu

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Re: Help Identifying component and distributor
« Reply #2 on: May 24, 2019, 06:57:43 am »
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.
 

Offline fzabkar

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Offline manu

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Re: Help Identifying component and distributor
« Reply #4 on: June 07, 2019, 06:26:21 am »
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.

 
 

Offline fzabkar

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Re: Help Identifying component and distributor
« Reply #5 on: June 09, 2019, 03:23:11 am »
 

Offline manu

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Re: Help Identifying component and distributor
« Reply #6 on: June 09, 2019, 01:13:53 pm »
Yes, unfortunately no datasheet available...
 

Offline moochinazz

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Re: Help Identifying component and distributor
« Reply #7 on: May 25, 2020, 06:19:10 am »
Hi, sorry for resurrecting an old thread. Has anyone managed to find the replacement for the chip mentioned in the first post?
 

Offline fzabkar

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Re: Help Identifying component and distributor
« Reply #8 on: May 25, 2020, 08:00:14 am »
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
 


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