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Electronics => Repair => Topic started by: Lorenzo_1 on June 27, 2021, 11:50:01 am

Title: Anyone recognise this chip logo/series
Post by: Lorenzo_1 on June 27, 2021, 11:50:01 am

Looking at a Li battery controller that gives a regulated DC power output. It has several chips that I've not been able to identify.  Not able to photograph effectively but all have BA7xxx code and logo "AP"(?) perhaps as shown in attached image.  The BA7K11 and BA7K11 look to be SOT223-8 packages (~5 x 4mm across the encapsulation). The BA7P12 appears to be a MOSFET.  Does anyone recognise this manufacturer and or chip series? 

Title: Re: Anyone recognise this chip logo/series
Post by: magic on June 27, 2021, 12:03:44 pm

http://aosmd.com/ (http://aosmd.com/)

Title: Re: Anyone recognise this chip logo/series
Post by: fzabkar on June 27, 2021, 08:19:16 pm

When I search for BA7P I get ...

http://www.aosmd.com/pdfs/datasheet/AO4402.pdf (http://www.aosmd.com/pdfs/datasheet/AO4402.pdf)

When I search for BA7K I get ...

http://www.aosmd.com/pdfs/datasheet/AO4419.pdf (http://www.aosmd.com/pdfs/datasheet/AO4419.pdf)

However, there is no reference to BA7P or BA7K in either datasheet???

Title: Re: Anyone recognise this chip logo/series
Post by: amyk on June 27, 2021, 08:37:00 pm

That's because it's the lot/date code.

The first line should contain 4402 or 4419.

https://assets.lcsc.com/images/lcsc/224x224/20180914_Alpha-Omega-Semicon-AO4402_C115828_front_10.jpg
https://commons.wikimedia.org/wiki/File:Terra_Pad_1050_-_AO4419_on_mainboard-0642.jpg

Title: Re: Anyone recognise this chip logo/series
Post by: Lorenzo_1 on June 27, 2021, 08:54:58 pm

Thanks for the ID. For some reason when I search for BA7K or BA7P I turn up nothing still. Must be search engine business.  Links make perfect sense for this application.