nRF52832 higher current consumption then nRF52840

RE: nRF52832 higher current consumption then nRF52840

Simonr — Thu, 26 Nov 2020 09:35:01 GMT

Are you seeing these different current consumption levels on development kits or are you testing on custom boards? If the latter is the case, I think I need some details on your hw configurations. Does, for example, one of the devices use the internal LFRC oscillator while the other one have an external crystal oscillator? Would it be possible to share the schematics of these custom boards? I can set this case to private mode if you'd like, so that only yourself and Nordic engineers will be able to see this case.

Best regards,

Simon

RE: nRF52832 higher current consumption then nRF52840

Elisa — Wed, 25 Nov 2020 17:34:12 GMT

Hi Simon,

thanks for your quick reply.

I attached the PPK graph of both devices.

Yes, we are quite positive that fw for the 2 devices has the same peripherals running.

We thought the bacground consumption depended mostly by the UART enabled. But could be different in the 2 devices?

RE: nRF52832 higher current consumption then nRF52840

Simonr — Tue, 24 Nov 2020 13:59:46 GMT

This does not sound right, the nRF52832 should be slightly lower, if anything, in terms of current consumption compared to the nRF52840. Are you positive that all the same peripherals are kept running on both devices? Do you have a PPK or some other way to measure the current consumption graphically so we might get some information of the current consumption graph?

You can also check out this current consumption guide for some of the most common ways to reduce current consumption. I know the guide is for the nRF51, but it is still relevant for the nRF52 series.

Best regards,

Simon