No Markings in L6390, L6386

[saraaj100]

Posted on July 26, 2013 at 05:37

We bought IGBT driver ICs, from element14.. L6388ED, L6390, L6386...all those ICs dont have any markings to find, which pin is No.1. Usually all ICs have dot mark to indicate PIN.NO.1, or U mark at the top of IC.

But the ST driver ICs dont have any markings.

I soldered IC L6388ED and given the supply by assuming pin numbers, in both direction. Its not working. I think that IC is damaged due to mis-numbering of PIN-OUT.

Help me to find PIN-OUT..

#l6388 #l6386 #l6390

[Cristiana SCARAMEL]

Posted on August 01, 2013 at 14:49

Hello,

when the IC/Chip has got no markings the simple way is hold it horizontally so that the writing is from left to right and now the pin no 1 is the one on the bottom left.

The mentioned device reports in their data sheet the package dimensions, here you can see that the SO package have a beveled edge.

Keeping the beveled edge at the bottom, the pin no 1 is the one on the bottom left.

Regards,

Cristiana