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  • Case ID: 336197
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nRF54L15 power consumption in sleep

Marcel Graber

Hi,

I've received the nRF54L15 DevKit and tested the power consumption during sleep
Testproject in GIT: https://github.com/marcel-cd/nrf54l15dk-powertest

The result was 960uA, the nRF52DK needed with the same settings 7uA. Are there any new settings or peripheral settings needed to get a proper sleep with the nRF54L?

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  • 0

    I had this same issue. With Dev kits, their Devicetree is configured by default to enable most/all peripherals (ADC, GPIO, UART etc).

    This is done within the ncs/zephyr/boards configuration .dtsi file by assigning status = "okay" to those peripherals.

    What you want to do is create an overlay of the dev kit and disable those peripherals by assigning status = "disabled"

    This should reduce your current consumption in sleep state.

    Zephyr should automatically be putting the peripherals to sleep however needs additional sleep configuration in the devicetree/configuration files which the Dev kit files do not contain by default.

  • 0 in reply to BrynMorgan

    Hi Bryn, 

    when you look at the project, you see that I already disabled UART and ADC in an overlay. ;-)

  • 0 in reply to Marcel Graber

    Sorry, I see that in the boards folder now. Are you certain it's actually applied to the build? In my build config I had to manually point it to the overlay file, it didn't seem to automatically detect it.

    I achieved ~3-4uA sleep current by using the cpuapp build configuration. Perhaps try that?

    Also I used the Board Configurator App to disable the UART/SWD/GPIO switches on the dev kit. According to the dev kit data sheet, leaving these active leaks current.

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  • 0 in reply to Marcel Graber

    Sorry, I see that in the boards folder now. Are you certain it's actually applied to the build? In my build config I had to manually point it to the overlay file, it didn't seem to automatically detect it.

    I achieved ~3-4uA sleep current by using the cpuapp build configuration. Perhaps try that?

    Also I used the Board Configurator App to disable the UART/SWD/GPIO switches on the dev kit. According to the dev kit data sheet, leaving these active leaks current.

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