How to reduce sleep current in nrf21540DK

RE: How to reduce sleep current in nrf21540DK

runsiv — Fri, 13 Sep 2024 09:20:03 GMT

Hi,

I would suggest having a look at the following resources

https://devzone.nordicsemi.com/f/nordic-q-a/110053/seeking-guidance-on-power-management-options-for-nf52840?ReplyFilter=Answers&ReplySortBy=Answers&ReplySortOrder=Descending

https://devzone.nordicsemi.com/f/nordic-q-a/93952/how-to-minimize-power-consumption?ReplyFilter=Answers&ReplySortBy=Answers&ReplySortOrder=Descending

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/test_and_optimize/optimizing/power_general.html

Optimizing Power on nRF52 Designs

Optimizing Power on nRF5340 SoC Designs

Note regarding the last one. It was written for a old version of the SDK and some functions might have been renamed since the time of writing

Regards

Runar

RE: How to reduce sleep current in nrf21540DK

hemakumar — Mon, 09 Sep 2024 11:32:18 GMT

Hello,

Is there any way around to get the sleep current down??

RE: How to reduce sleep current in nrf21540DK

runsiv — Wed, 04 Sep 2024 13:35:45 GMT

I suspect it might be peripheral power domain related. I was able to get the same readings as you and if I tried with just the blinky sample with CONFIG_SERIAL=n it was down to 3µA.

I will test more tomorrow

Regards

Runar

RE: How to reduce sleep current in nrf21540DK

hemakumar — Mon, 02 Sep 2024 14:41:59 GMT

I tried the Bluetooth peripheral power profiler sample too, it takes the same 21uA in between the adv and also during the sleep

Inbetween the adv:

Full Sleep:

Could u able to reproduce the issue in nrf21540dk??

RE: How to reduce sleep current in nrf21540DK

runsiv — Thu, 29 Aug 2024 13:34:35 GMT

Thank you for your patience, I will have my DK tomorrow so that I can duplicate your findings. I would also suggest to rather start with the Bluetooth peripheral power profiler sample

Regards

Runar

RE: How to reduce sleep current in nrf21540DK

hemakumar — Mon, 26 Aug 2024 12:59:28 GMT

It takes way more now...(tried on both nrf_only and default)

This is when i set the input voltage to 3.3v, if i set to 5v then it constantly takes 2mA and the code isn't running.

I removed my usb and connected as per the following:(should i also connect the usb as shown in the pic??)

RE: How to reduce sleep current in nrf21540DK

runsiv — Mon, 26 Aug 2024 10:55:25 GMT

Hi Hemakumar

Could you try to run the same measurement using source mode? This is to check if we are seeing noise from the USB

Regards

Runar