PPK showing 80 mA on DK

RE: PPK showing 80 mA on DK

Konrad213 — Thu, 18 Jun 2020 17:37:02 GMT

Alright, thanks!

RE: PPK showing 80 mA on DK

Simonr — Thu, 18 Jun 2020 09:38:03 GMT

I'm sorry, but the pulses you are describing as well as the fact that you've been powering it/them with more than the specified maximum input voltage points towards that the PPK(s) have been damaged by the input voltage. There could, of course, be another reason, but the 80mA peaks from your previous image mean that the devices are no longer working I'm afraid.

Sorry to break it to you,

Simon

RE: PPK showing 80 mA on DK

Konrad213 — Thu, 18 Jun 2020 06:49:21 GMT

Thanks Simon, yeah it's probably due to powering it with a 3.7V battery. It worked fine for a long time before this behavior started though but it might just be that the battery was partially discharged with a lower voltage than 3.7 and it stopped working after charging (not sure about this). Do you think there could be any other reason? I've seen this behavior on two different ppks.

RE: PPK showing 80 mA on DK

Simonr — Wed, 17 Jun 2020 09:35:32 GMT

Hi Konrad

Thank you for the image upload and the confirmation of your setup. Do you have multiple PPKs behaving like this, or just the one? From the image, it does not look good, as a current draw of 80+ mA generally points towards something being defect on the PPK. Was it like this when you got it, or did it happen after some time of operation? Are you able to see any physical components missing on the PPK, or have you powered it with more than 3.6V at any point that might have damaged it? Can you please try to explain in detail what happened when/prior to the PPK when it started showing these values?

Best regards,

Simon

RE: PPK showing 80 mA on DK

Konrad213 — Tue, 16 Jun 2020 17:25:34 GMT

Thanks Simon,

Yes switches are in the right position and the solder bridge is cut. I just downloaded an older version of nrf connect and it's still not working. Sorry about the picture, here it is again:

RE: PPK showing 80 mA on DK

Simonr — Tue, 16 Jun 2020 13:42:39 GMT

Hi Konrad

Were you supposed to upload an image to this ticket? If so, please try again as I don't think it was uploaded. Either way, here are a few suggestions: Make sure that the switches on the PPK are in the correct positions. When measuring on a DK, the correct setup should be the following

Power select: DK
DUT select: DK
COM: DK

Please also verify that you have cut the solder bridge on your DK. SB9 for nRF52832 DKs. SB40 for nRF52840, nRF52833, and nRF5340 DKs. If you think the nRFConnect update might be the issue, you can try downgrading to an older version of the Power Profiler app like this:

Download and install nRFConnect.
Uninstall the current nRFConnect programmer version by clicking the dropdown tab and uninstall.
Close nRFConnect
Download and place the .tgz file in C:\Users\<username>\.nrfconnect-apps\local\.
Open nRFConnect and run the app. You should now be using the version you placed in the \local\ folder.

Best regards,

Simon