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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 25th Nov 2020, 12:47 pm   #1
McMurdo
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Default i.d a chip

Just after a second opinion on an SOIC8 chip from an SMPSU.

I think it's a UCC3808 (or chinese clone) but can't be sure.
It drives the primary of a push-pull gate drive transformer from pins 6-7.

It's too small to photograph but I've reproduced the writing here.

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Old 25th Nov 2020, 1:45 pm   #2
Outrun_uk
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Default Re: i.d a chip

Yes I’d agree that’s the one, 3808 pins 6&7 are the outputs so that makes sense.
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Old 25th Nov 2020, 1:48 pm   #3
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Default Re: i.d a chip

That looks like the Unitrode logo in the bottom left (the underlined U). I'd say it's a bona fide UCC3808-1. TI bought Unitrode some time ago.

https://www.ti.com/product/UCC3808-1

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Old 25th Nov 2020, 8:35 pm   #4
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Default Re: i.d a chip

Yes, quite a useful little chip, app notes should be available on the web

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Old 25th Nov 2020, 10:36 pm   #5
McMurdo
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Default Re: i.d a chip

thanks folks!
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