NRF5340 low-power measurement with PPK2

Hi,

I aw various other posts ( nRF5340-DK Low Power Configuration Issues)

and the post on Optimizing power on nRF53 designs  but I never get results that low.

The Blog post doesn't really help, since it only states the Zephyr settings and not the

real software settings. Using the example from the post mentioned above gets the same

results (650 uA on 1800 mV)

Our setup:

PPK as power supply for NRF5430-DK (version 0.11.0)

SB40 is bridged

SW6 to DEFAULT (if no nRFOnly, more current seems to run)

SW9 to VDD

SW10 to ON

For software:

basic loop, while(1) { WFI(); }

and 100 Hz RTC1 based TICK.

HFCLKSRC = HFINT

Other peripherals idle.

When I measure is still get around 650 uA when setting PPK supply to 1800 mV. (around 1000 uA when 3000 mV).

So 2 questions:

- is the hardware setup ok?

- what can we do in the software?

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  • Hi

    Okay, that looks correct. Can you export the current consumption trace from the power Profiler and upload it here so I can take a look? Please note that .ppk files are not okay to upload as is in DevZone so you need to zip the file. 640µA is way too high and points to a peripheral for example being left running for some reason. Please also double check that you followed the "power optimizing guide" correctly.

    Best regards,

    Simon

Reply
  • Hi

    Okay, that looks correct. Can you export the current consumption trace from the power Profiler and upload it here so I can take a look? Please note that .ppk files are not okay to upload as is in DevZone so you need to zip the file. 640µA is way too high and points to a peripheral for example being left running for some reason. Please also double check that you followed the "power optimizing guide" correctly.

    Best regards,

    Simon

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