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-   -   i.d a chip (https://www.vintage-radio.net/forum/showthread.php?t=173517)

McMurdo 25th Nov 2020 1:47 pm

i.d a chip
 
1 Attachment(s)
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.

:)

Outrun_uk 25th Nov 2020 2:45 pm

Re: i.d a chip
 
Yes I’d agree that’s the one, 3808 pins 6&7 are the outputs so that makes sense.

cmjones01 25th Nov 2020 2:48 pm

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

Chris

Ed_Dinning 25th Nov 2020 9:35 pm

Re: i.d a chip
 
Yes, quite a useful little chip, app notes should be available on the web

Ed

McMurdo 25th Nov 2020 11:36 pm

Re: i.d a chip
 
thanks folks!


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