Hi,
I added a small shunt resistance to see current consumption of nRF52832.
I see current ripples when DCDC regulator is enabled, this ripples doesn't exist when DCDC is disabled. Is it expected?
DCDC disabled
DCDC enabled
black signal:voltage on shunt resistor
red signal: voltage/10 approximation of current(10 ohm shunt)
Hi, you should see the DCDC switching after the HF crystal has ramped up, but not after the advertising event.
So, what's inside the green circle is normal (HF crystal running), but not the red circle (should be in low power mode, 2-3uA):
So what this indicates is that the regulator does not enter ULP mode (low power mode) after the BLE event. There can be many reasons for this, but the most common is that you have not turned off logging. Set NRF_LOG_ENABLE to 0 in sdk_config.h.
Nevertheless, if you are not expecting the regulator to enter low power mode after the BLE event, i.e. running peripherals that need the HF clock, the DCDC plot is completely normal, and as expected.
