reducing power consumption during BLE scan

[kobyatom]

We're using the nRF52840 in our product.

We require to perform continuous scanning, with little power usage as possible.

We've seen in the Nordic specs and verified with measurements that scan consumes an average of 10 mA w/ DC/DC converter active and 6.5 mA w/o, 

this is too much for our battery capacity and expected lifetime, and are looking for ways to reduce that average current, and/or reduce the overall mA/h used by the system.

Please provide ways, if exist.

We're open to anything - modify scan parameters, MCU parameters (clock freq, ...), HW tweaks and modifications, etc.

[Simonr]

Hi

Thank you, Igor, for a great answer! The DC/DC converter should indeed consume less power than the LDO. Where did you find these numbers in our specs? According to our specs, the RX current consumption for continuous scanning will be ~6.5mA with the DCDC enabled. I don't think you will be able to get much lower current consumption doing continuous scanning as the radio does consume quite a bit of power when it is running.

Best regards,

Simon

[kobyatom]

I got the currents mixed. w/o DCDC its about 10 mA.
Thanks