nrf52 power consumption system ON mode，have some Current burr？

[826896167]

Current consumption
BLE event total charge	9.10 µC
Idle current	2.0 µA
Total average current	89 µA

I used nordic ble_app_pwr_profiling，nordic PCA10040，test instrument is N6705C，but my test is 6-7uA，why？

[Kenneth]

Hi,

Can you just do a simple:

int main(void)
{
  while(1)
  {
    __WFE();
  }
}

Also make sure you read:
https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_meas_current.html 

Best regards,
Kenneth

[826896167]

Thanks you kenneth!

I used rtc app，modify flow code：

int main(void)
{

    while (true)
   {
       //__SEV();
       //__WFE();
       __WFE();
   }
}

the reset is：4-5 uA

And there's another problem,I'm not sure what makes the little spear??

thanks,Best regards.

[826896167]

hi kenneth:

Power the DK from a coin cell battery,That problem has been solved!

And there's another problem,I'm not sure what makes the little spear??

[Kenneth]

These spikes are likely the internal regulator in the nRF52-series operating in refresh mode, refresh mode will turn ON the regulator for short periods instead of continoustly be turned ON. This is to save power, you can find more information about "refresh mode" if you search here in devzone.

Best regards,
Kenneth

[826896167]

thanks you kenneth！