current consumption is very high during sleep off mode in nrf52832

[amey3]

Hi ,

        i am using nrf52832 soc with customize board trying to optimize the power the following events occur:

       1)The first time when i code uploaded it  initialize all the function and goes in "idle_state_handle()" where it goes in system off mode the current rating in these event is 7.15ma which is measure through power profile kit but ideally the current rating should be 0.7ua.

       2)In advertise mode the current rating measured by power profile kit is 10.48ma but actually the current rating is 5.303ma which is i refered by datasheet of nrf52832 .I have calculated from datasheet as for system on of nrf52832 as 1.9ua  and BLE on for advertise as 5.3 mA peak current in TX (0 dBm).

So how to minimize the current rating from 7.15ma  to 0.7ua  on system off mode and also in advertise mode the current rating from 10.48ma to 5.303ma.

[Vidar Berg]

Hi,

1) The CPU run current is ~7 mA if you don't use the DCDC regulator, so it seems like the system is not going to sleep for some reason.

2) 5.3 mA is the isolated RADIO run current, it does not include clock sources and CPU processing. You can use our online power profiler (https://devzone.nordicsemi.com/nordic/power/w/opp/2/online-power-profiler-for-ble) to get a better picture of what the total current consumption should be.

Here are some pre-compiled hex files you can use if you want to measure the System ON and OFF current on your board:

System ON

system_on_LDO_regulatorpca10040.hex

System OFF

system_off_pca10040.hex

Best regards,

Vidar

[amey3]

Hello sir,

             In systemoff mode i have reduced the current by using the function  nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_RESET); by below 1ua but stuck in that function only. I have to again wakeup from shutdown process which function i have to used and in my customized ble logger i have used single button with gpio pin P0.13 .can you guide me how to solve these problem