IOVDD is constantly high

[simon belanger]

Hello,

I am using the nRF5340-DK board along with the nRF7002-EK companion. I noticed that current consumption was high while running my MQTT application on this setup, particularly at IOVDD. Current is averaging 700-800 uA at IOVDD while powered through the USB and it seems pretty constant, measured from both a PPKII and an ammeter. From reading the docs, it seems like the switch on the nRF7002-DK which is tied to GPIO P1.00 on the nRF5340 should activate/deactivate that switch in order to disconnect IOVDD when not necessary. However, it seems like this GPIO is maintained high all the time.

Do I need to configure the application in any particular way to enable switching? I have tried those configs with no success

CONFIG_PM_DEVICE=y

CONFIG_NRF_WIFI_LOW_POWER=y

CONFIG_NRF700X_QSPI_LOW_POWER=y

I have also tried running sample WiFi Shell and IOVDD is also maintained high all the time.

Thanks in advance

[Håkon Alseth]

Hi Simon,

 

My apologies for the inconvenience.

simon belanger said:

 Also, I thought that having the DK in mode nRF_ONLY meant that these connections were broken anyway?

I agree, there is something else in addition that is drawing current here. I'll report this internally, so that we can update our docs in this matter.

simon belanger said:

Will that consumption issue happen with nRF7002-DK? If this board does not have that issue, I might use it instead if that can be simpler.

I can confirm that the nRF7002-DK does not have this current consumption issue.

 

Kind regards,

Håkon

[simon belanger]

Hi Håkon,

thank you for the support, I will purcahse a nRF7002-DK and try the Station Sample on this development kit and I will keep you posted on the measurements.

Best Regards, 

Simon

[Håkon Alseth]

Hi Simon,

 

Always happy to help.

I checked the nRF7002-DK in both QSPI and SPI transport, and it had a normal current consumption curve, ie. no offset as observed with the nRF7002-EK.

Let me know if you run into any issues or have questions.

 

Kind regards,

Håkon

[simon belanger]

Hi Håkon, 

just for closure, I tested the nRF7002DK board and I did measure a current draw that was similar to yours at both IOVDD and VBAT. Here are the measurements:

In the end it seems like it was the nRF5340DK + nRF7002EK which were drawing more current than expected. I won't be using that board combo for evaluation of consumption from now on.

Thanks for the support