Re: Sleep current on #nrf52480

Carles Cufi

Hi Fabien,


My guess is that this is in great part caused by the UART not being shut down.

There is currently a PR to address this:


I have copied Jakub and Andrzej so that they are aware and they should be able to follow-up.






From: <users@...> on behalf of Fabien Lepoutre <fabien@...>
Date: Friday, 29 June 2018 at 00:56
To: "users@..." <users@...>
Subject: [Zephyr-users] Sleep current on #nRF52480


Hi all,


I've ran some power consumption tests with Zephyr 1.12 #... a00646a5


Using the samples/boards/nrf52/pwr_mgr at lowest power mode, I find that the nrf52840 has a sleep current of ~550uA.


When I run simple power management code with Nordic SDK in sleep mode,  I get about ~30uA.


To run these tests, I used the PCA52840 PDK board and measured the current using the Nordic Power Profiler Kit and also a third party solution. I'm confident the current numbers are right.


Has anyone ran sleep power measurements on the nrf52840 and have different results? 

I would like to understand the discrepancy between Zephyr OS and nordic SDK to bring down my current power numbers to the SDK ones.


Thanks a lot!




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