high current consumption of nrf 5340 with 7002

[allenyang]

I'm using the custom board of nrf 5340 with 7002.

When I run the sample project of Hello World, the current is about 90 ma,

and I run the sample project of WI-FI Scan, the current is about 50ma when its scanning, and 2ma in the idle state. 

 I've tried to disable all the gpio ,spi and  I2C pin in device tree, and it's still the same high current.

Does it have any way for reducing the current?

[Kazi Afroza Sultana]

Hello,

Sorry for the late reply. I have talked to the team. Have you checked the pin state?

You can check the pin states of the nRF7002 to ensure that it is in shutdown state. Does the problem occur for only one board or for several boards?

[allenyang]

Hi,

I noticed that the current is possibly changed after rebooting the board, so it’s sometimes 90ma, and sometime 20ma. But I don,t know why this happened.

”You can check the pin states of the nRF7002 to ensure that it is in shutdown state.”

which pin should I check?

“Does the problem occur for only one board or for several boards?”

It seems several boards because I’ve tried two boards.

[allenyang]

I read the nrf7002 datasheet and found that there is a pin, buck_en, that can be control to shutdown nrf7002 ,when I set the signal to 1, the current becomes 9ma, it seems the current is much more normal.

But can the current be much lower?  I've disabled all the devicetree pin, and only print "Hello world" in the application.

Did I disable it not correctly? I just changed the status = "okay" to status = "disabled".