nrf5340 sleep currrent consumption

[Lavanya_Manohar]

In our custom board nrf5340-nrf7002, tried system_off(C:\ncs\v2.6.1\zephyr\samples\board\nrf )sample to check power consumption. 

But it measures 0.60mA

Is there any config need to address? please provide debug steps

[Kazi Afroza Sultana]

Hello,

What is the base-current consumption of your board when everything is in sleep mode? 

You have flash and i2c on your board. So, there must be some added current from other parts of your custom board.

[Lavanya_Manohar]

Hi,

Kazi Afroza Sultana said:

What is the base-current consumption of your board when everything is in sleep mode? 

When we have flash a simple sample(with counter+LED) in our custom board, board consume overall 28-33uA. 

When we add wifi+Task+interrupt+ble+i2c related code to the same code the overall board current goes upto 60-70uA

Kazi Afroza Sultana said:

You have flash and i2c on your board. So, there must be some added current from other parts of your custom board.

Could you please shrae the detail of how much it consume(current measurement) when we add peripherals? So that we can conclude the PM of our board. 

[Priyanka]

Hi Lavanys,

Lavanya_Manohar said:

When we have flash a simple sample(with counter+LED) in our custom board, board consume overall 28-33uA. 

This sounds reasonable and is expected.

Lavanya_Manohar said:

When we add wifi+Task+interrupt+ble+i2c related code to the same code the overall board current goes upto 60-70uA

But this jump is quite drastic. So issue could be with the ble, wifi, tasks or interrupts. Maybe you can try to add the BLE, tasks, interrupts one by one and check which is the main contributor of the current.

Also, you could maybe try to check the consumption by analysing them one by one.

For eg., make sure your WiFi chip is powered down when in system off mode.

Make sure the i2c peripherals are disabled properly during the System OFF mode.

-Priyanka