Spikes consumption on nPM13004 with no load

[Emmanuel JEZ]

Hello, 

I am testing the power consumption of the npm1304 for the first time. To do this, I am using the PPK2 connected to the nPM1304-EK on VBAT and GND of the P1 connector. I have nothing connected to the Buck and LDO. I have disabled the FUEL Gauge and the Buck1 and LS/LDO outputs.

When I take my measurements, I see current spikes of 2mA every second. 
Could you tell me where this consumption is coming from? Is it from the I2C communication? Is it possible to disable these consumption spikes?  

[ketiljo]

I assume the EK is used with the PowerUP app. The nPM Controller on the EK is instructed to sample measurements once a second which involves multiple I2C transactions - hence the current spikes. Disabling the Fuel Gauge in the GUI stops the measurement processing but not the sampling itself.

As of now, there are no ways to disable this polling from the GUI... Two options here:

1. Close PowerUP and power cycle the EK (nPM Controller USB port). As long as nPM Controller is not connected to the PowerUP, there will be no I2C transactions. Bucks can be disabled with the BUCK STARTUP CONFIG headers (ground to disable) - need a PMIC power cycle too
2. Use shell manually to disable sampling (command npm_adc sample 0)

[Emmanuel JEZ]

Thank you for these explanations.

Could you send me a link where I can find the list of shell commands for the npm1304? 

[ketiljo]

Just write 'help' in the shell