power management nrf52840

RE: power management nrf52840

František — Tue, 26 May 2020 11:05:09 GMT

May be closed. Thank you again.

RE: power management nrf52840

Simonr — Tue, 26 May 2020 09:02:15 GMT

These values seem good according to the specification! Do you need any further support or can we close this case?

Best regards,

Simon

RE: power management nrf52840

František — Mon, 25 May 2020 15:17:09 GMT

Thank you, chip was probably broken. Next chip have in active state 17mA and in sleep state 0.45uA.

RE: power management nrf52840

Simonr — Mon, 25 May 2020 12:11:17 GMT

Both these values seem to be incredibly high for a single device. What other peripherals are enabled on your device at the same time? It seems like there must be quite a few other peripherals drawing power as well as the nRF52840. Please make sure you disable all unnecessary peripherals as you go to sleep so that they won't draw power while your radio is sleeping.

Have you measured how much power I.E. the sensor detector draws by itself?

As for what you can do to reduce the current on the nRF52840 itself, you can try enabling the DCDC regulator, if running on a DK or a board with the required components and add the following line to the start of your main() loop:

NRF_POWER->DCDCEN = 1;

When the radio is active transmitting or receiving by itself, you should see a current consumption according to the PS here.

Best regards,

Simon