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I have one IC for which I can not find any clue for the part number (PN).

It has "BA7P16" and "5810" on it.

Enter image description here

What manufacturer has that logo and what chip is it?

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    \$\begingroup\$ +1, always nice to see high quality photos. :) \$\endgroup\$ – Wossname Mar 19 at 11:24
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I think I found it by myself. It is from Alpha & Omega Semiconductor Inc. Here take a look.

This website helps.

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    \$\begingroup\$ You should complete your answer. Q1 is a dual N-channel 20V MOSFET with a common drain. Links to parts tend to dry up over time, so all we have left is what you copied and put in quotation highlight. \$\endgroup\$ – Sparky256 Mar 19 at 0:17
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    \$\begingroup\$ +1 for useful link. \$\endgroup\$ – Ale..chenski Mar 19 at 0:19
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    \$\begingroup\$ As @Sparky256 says complete your answer with the relevant information and we will probably upvote it. You could also accept it as an answer. \$\endgroup\$ – StainlessSteelRat Mar 19 at 0:42
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    \$\begingroup\$ Can you be more explicit in your answer about the process (so the answer can applied more generally and benefit others)? For instance, was it logo search → manufacturer name "Alpha and Omega Semiconductor" → search on Digikey for the manufacturermanufacturer page on Digikey → search on that page for "BA7P16" and "5810" → match for "5810"? Or some other step/process? (Use the edit button.) Thanks in advance. \$\endgroup\$ – Peter Mortensen Mar 19 at 10:56
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    \$\begingroup\$ @DerStrom8 - Hi, Just FYI, here is confirmation that for this device, the top row is part of the device part number, and the second row is other info, including a date code (format not explained here), clearly not a simple YYWW format! See this archived PDF link, since the link now fails on the live Alpha & Omega Semiconductor website. \$\endgroup\$ – SamGibson Mar 19 at 12:35

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