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Altera_Forum
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14 years ago

EMP1270 BGA burning up

On a new design we have a repeated problem that the EMP1270 developes a short between pwr and gnd and smokes. Single 3.3v supply operation, all other devices on board on same supply. The only exposed...
Altera_Forum's avatar
Altera_Forum
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13 years ago

Even if the thread is inactive for a year ...

I have a very similar problem with our boards.

We are using the same device and package,

Sometimes when switching on the CPLD gets burned immediately

and the 3.3.V power rail has a shortcut.

Getting the CPLD off from the PCB, I could verify that at least in one

case VCCINT had a shortcut (below 5 Ohms) while VCCIO was ok.

The power supply is realized using a linear regulator 5V -> 3.3V.

5V are generated by a switching regulator.

Could you figure out the reason for the failure on your boards ?