Potentially fried nPM1304EK

RE: Potentially fried nPM1304EK

Scigrapher — Tue, 28 Oct 2025 16:05:27 GMT

It's already on the way. :)

RE: Potentially fried nPM1304EK

Tharaka — Tue, 28 Oct 2025 13:45:02 GMT

Hi

The PMIC is dead. You may need to replace the IC or buy a new EK.

BR

Tharaka

RE: Potentially fried nPM1304EK

Scigrapher — Mon, 27 Oct 2025 22:42:42 GMT

The battery directly is reading 3.8V.

it's pretty odd... the readings all start at one value and then slowly decrease. After removing the probe, it seems to slowly charge back up to its original value. It seems to be basically the same when the battery isn't disconnected, so perhaps it's a capacitor.

VSYS is 230mV

VOUT1 is 112mV

VOUT2 is 400mV

RE: Potentially fried nPM1304EK

Tharaka — Mon, 27 Oct 2025 08:59:49 GMT

Hi

I think there is a high chance that PMIC is permanently damaged.

Reversing the battery polarity can cause the IC to overheat and fail, especially if it was connected that way for more than a brief moment.

As a last check, could you measure VSYS, VOUT1, and VOUT2 while the battery is connected correctly with default EK configurations ?
If none of these rails are active, it’s likely the PMIC is no longer functional.

Regards

Tharaka