How to reduce sleep current in nrf21540DK

[hemakumar]

Hello, I am using the peripheral_lbs example project and build it for nrf21540dk_nrf21540

I also added CONFIG_SERIAL=n, CONFIG_UART_CONSOLE=n for disabling uart.

But still i couldn't able to get <=3uA sleep current.

Do i have to enable/disable something to get sleep current??

I measured power consumption by following steps as instructed in nordic documentation:

1. Cut SB40 bridge

2.provided connection acc. to the diagram

3.Set the ppk to ampere meter mode and enabled the power output

I even tried in both nRF only and Default modes (toggle switch in DK), but still couldn't see any much difference.

What should be done to get <=3uA sleep current in nrf21540DK??

[hemakumar]

Hello,

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

[runsiv]

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