High power consumption in system OFF mode using xiao nrf52840 ble

RE: High power consumption in system OFF mode using xiao nrf52840 ble

Juan Lopez — Fri, 04 Apr 2025 15:28:36 GMT

Hello, sorry for the late response. The issue was caused by the QSPI Flash memory in the seed xiao board, which was drawing a lot of current in sleep mode. After disabling it I can successfully get an average of 500 nA :)

RE: High power consumption in system OFF mode using xiao nrf52840 ble

Juan Lopez — Fri, 04 Apr 2025 15:28:32 GMT

RE: High power consumption in system OFF mode using xiao nrf52840 ble

PjGlasso — Mon, 10 Mar 2025 02:19:44 GMT

Hi there,

So I assume you got the (NON Sense) version it has No accelerometer or PDM microphone. should sleep a 4ua.

what bootloader ?, factory one (ada-fruit) also those are using the NON-embed BSP version 1.1.1 in Arduino to get those test numbers BTW :+1:

HTH

GL :-) PJ :v:

I have the power profiler-2 also and verified them, check the forum on Seeed Studio

forum.seeedstudio.com/.../270472

RE: High power consumption in system OFF mode using xiao nrf52840 ble

Sigurd Hellesvik — Mon, 30 Dec 2024 11:09:32 GMT

Hi,

Which version of the nRF52840 Xiao BLE do you have? Sense or no sense?

The Sense version has the accelerometer lsm6ds3 on it, and from its datasheet, it looks like it draws 6uA in power-down mode.
It also has a PDM microphone, but I cannot find out which one this is. That could also consume some current.
And lastly it looks like it could also have external flash. Same for this.

If you can find current consumption for the two latter, maybe all the numbers add up to ca 10uA in the end?

Some hardware peripherals have Chip-Select pins where then can be "deselected" and thus maybe they consume less current in this mode. If so, that could be worth looking into as well.

Let me know if you got any questions.

Regards,
Sigurd Hellesvik