High Current Consumption on nRF9151-DK

RE: High Current Consumption on nRF9151-DK

Oleg-AgamControl — Wed, 19 Nov 2025 15:22:53 GMT

You were absolutely right. After deactivating the UART, the total board consumption dropped below 5 µA. Thank you very much for your professional and prompt assistance

RE: High Current Consumption on nRF9151-DK

Simonr — Wed, 19 Nov 2025 14:29:50 GMT

If the board is set in PSM mode and nothing else drawing current either you should be able to see single digit µA levels of current consumption. Slight leakage might be there, but I think ~5µA should be achieveable when everything is disabled correctly.

Best regards,

Simon

RE: High Current Consumption on nRF9151-DK

Oleg-AgamControl — Wed, 19 Nov 2025 09:14:47 GMT

Thank you for your reply. I will try to run the tests soon and let you know the results.
In any case, could you please tell me what current consumption we should expect after fully UART deactivating?

RE: High Current Consumption on nRF9151-DK

Simonr — Wed, 19 Nov 2025 08:11:43 GMT

Hi Oleg

I just want to say that I agree with Achim here, and this does indeed sound like an active UART. If you'd like, you can upload the zephyr.dts from your build folder so we can see what is enabled or not?

Best regards,

Simon

RE: High Current Consumption on nRF9151-DK

Achim Kraus — Tue, 18 Nov 2025 07:49:38 GMT

[quote userid="145124" url="~/f/nordic-q-a/125642/high-current-consumption-on-nrf9151-dk"]around 300 µA to 400 µA[/quote]

First guess (you will find a lot of tickets about that current value), this is an active UART. Disable it or use the power manager to suspend it. And then see, what you get.

RE: High Current Consumption on nRF9151-DK

Simonr — Mon, 17 Nov 2025 14:42:41 GMT

Hi Oleg

I need some time to look into this issue and get proper answers for you. I'll get back to you tomorrow or on Wednesday with more information.

Thank you for your patience!

-Simon