Hi guys
Here is a general question and I would like to hear your thoughts on it
I've just replaced a very small 11 contact MP2329 QFN on a motherboard
This supplies 1.8V STBY to the PCH - but the faulty one was only giving 0.7V
Anyway I fitted it, but it is very close to the DIMM sockets and I can not clearly see down one side of it to make sure it has soldered properly ,even shining a torch down there. The other sides look OK under the microscope and also in a jewellers loop. This is the side that has two resistors that set the output voltage
Datasheets on this thread
https://www.badcaps.net/forum/showthread.php?t=95281
So I was wondering if it is possible to have a fault (or bad soldering) on a buck regulator where the output voltage goes too high. Mine has 3.3V input which it drops to 1.8V. As I obviously don't want to trash the PCH I wondered should temporarily connect a 2V zener on the output capacitor side of the inductor, such that if the voltage goes above 2V it shorts it out.
So what are your thoughts on that, a good idea or am I just being paranoid?
Rich
Here is a general question and I would like to hear your thoughts on it
I've just replaced a very small 11 contact MP2329 QFN on a motherboard
This supplies 1.8V STBY to the PCH - but the faulty one was only giving 0.7V
Anyway I fitted it, but it is very close to the DIMM sockets and I can not clearly see down one side of it to make sure it has soldered properly ,even shining a torch down there. The other sides look OK under the microscope and also in a jewellers loop. This is the side that has two resistors that set the output voltage
Datasheets on this thread
https://www.badcaps.net/forum/showthread.php?t=95281
So I was wondering if it is possible to have a fault (or bad soldering) on a buck regulator where the output voltage goes too high. Mine has 3.3V input which it drops to 1.8V. As I obviously don't want to trash the PCH I wondered should temporarily connect a 2V zener on the output capacitor side of the inductor, such that if the voltage goes above 2V it shorts it out.
So what are your thoughts on that, a good idea or am I just being paranoid?
Rich
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