TPS51120 - Issues with orientation

liam wynn

Hey all!

I have to replace one of these which is very much fried (via short circuit). But have issues with orientation.

The orientation of the chip is supposedly the same in both depictions, yet...

The motherboard's schematic suggests that C462 and R458 are to the left (circled): http://i.imgur.com/Nmnk7.png

Yet in this picture I took of the chip in question, C462 and R458 are at the bottom: http://i.imgur.com/GxnTM.jpg

What the heck! Should I follow the schematic or the picture? I'm now freaked that the (original) chip may have had its orientation markings printed wrong or something.

The voltages read off the chip appear to be coherant with the schematics, so I'm leaning towards the chip orientation marking being wrong.

Thanks!

over 11 years ago

0 Nancy Zhang over 11 years ago

TI__Mastermind 46760 points

Hi Liam,

Could you please ask TI local FAE for support?

Thanks,

Nancy

0 liam wynn over 11 years ago in reply to Nancy Zhang

Prodigy 20 points

Hey,

Thanks for the reply, which dept to I have to mail? Does it fit into the "MCUs" category? Cheers

0 Nancy Zhang over 11 years ago in reply to liam wynn

TI__Mastermind 46760 points

Hi Liam,

Could you tell me you location? I will try to find a local FAE to help you.

Thanks,

Nancy

0 JohnTucker over 11 years ago in reply to Nancy Zhang

TI__Guru**** 191445 points

It "looks like both the schematic and PCB are correct. The schematic is usually drawn for for easy readability and and may not have any relationship tot the orientation of the IC mounted on the PCB. It would be much easier to tell if you would post the PCB layou file (PDF format is fine) or repost your picture without any mark ups so I can see the traces.

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TPS51120 - Issues with orientation