nRF52832 high current proplem

[cabin]

Hello

SDK17.0.02

softdevice : s112

tool : segger embedded studio

Board : My production 

Current is too high in power off mode.
The current current is about 120uA. (measurement error about 10uA, so about 100uA high)

Four sensors were processed through sleep or power off.
But 110uA has not been solved yet. 
Is there an action to be taken for each SDK version or softdevice version?
Or is there something to modify in sdk_config.h?

Verification is required.

2476.sdk_config.h

Thank you

[Susheel Nuguru]

Could you reproduce this on our DK? If yes, then it should be a peripheral configuration issue. If you cannot reproduce this on our DK then it most likely seems like issue with your hardware.

Do you know if you are measuring only the current used by nRF chip or the whole board with external components?

[cabin]

Thank your reply 

Unfortunately, I do not have a DK.
You are measuring the entire board. I just want to know if there is another way to set SDK version or softdevice version and what sdk_config.h settings affect the current.

[Susheel Nuguru]

I do not see anything in the SDK config that can affect this. The SDK version and or softdevice versions are not normally affecting the power consumption.

If you are comparing the power with our specified sleep currents, then you need to only measure the nRF chip power consumption and not the whole board power consumption (which includes external components).

When you measure only nRF chip current and still seem that it consumes high current, then check of you have CONSTLAT enabled in our power settings. this is not done in sdk_config.h file but done inside the application sources explicitly by application.

[cabin]

Current is still high.
NRF_POWER->TASKS_CONSTLAT = 1;

Are you referring to this setting? applied, but the current is high.
Is there any other way?

[Susheel Nuguru]

I failed to see that your chip is using Systemoff. In that case CONSTLAT should not matter. 

Have you measured the current usage only by the nRF chip and give me how much current it consumes in system off? You mentioned that 120uA is the current used by the whole board and this does not imply that nRF chip is using most of it.

[cabin]

Is there a separate way to measure nrf52 only? Or are you saying to remove the surrounding sensors and measure them?

Thank you

[Susheel Nuguru]

It depends on your custom board. For example on our nRF52832 DK we have few few solder bridge that we need to prepare to measure just the current of the chip and not the whole board as shown in this documentation. You probably have such test points on your board? If not you need to ask the hardware engineer who designed your custom board.