nRF9160 max current draw

RE: nRF9160 max current draw

Håkon Alseth — Thu, 26 Aug 2021 14:07:00 GMT

Hi,

[quote user="aawcorn"]Do you have any info on the duration of the peak current pulse? i.e. Can I assume it will be a fraction of the tallest peak shown in the power profiler?[/quote]

In a overall scenario: This highly depends on the activity between the device and the cell tower.

W.r.t the specification, it is the peak within a tx subframe (1 ms).

[quote user="aawcorn"]For example, the RRC release looks to have the tallest peak (~100mA), can I assume it will be a fraction of that time period?[/quote]

That is defined with the lowest time period as well, so its peak is likely higher, as its a TX frame inside of this timeframe.

I would strongly recommend that you evaluate the current consumption profile of your product, as you will also get the current consumption of everything else on your board (if you have any external components / ICs) in a asynchronous way (think of accelerometers, gyros, LEDs, etc)

Kind regards,

Håkon

RE: nRF9160 max current draw

Aaron — Wed, 25 Aug 2021 15:06:55 GMT

Thanks for the response. Do you have any info on the duration of the peak current pulse? i.e. Can I assume it will be a fraction of the tallest peak shown in the power profiler? For example, the RRC release looks to have the tallest peak (~100mA), can I assume it will be a fraction of that time period? Or what event does the peak occur? I'm trying to get an accurate power profile for our battery specification and supporting a 430mA pulse puts us into a different battery type depending on how long it happens.

RE: nRF9160 max current draw

Håkon Alseth — Wed, 25 Aug 2021 11:38:09 GMT

Hi,

[quote user=""]

What do the specs “extreme operating conditions” and “Ant VSWR3" mean?

[/quote]

It's the outer ends of the operating conditions.

VSWR3 = voltage standing wave ratio of 3. Ie. how well matched the antenna is at the given frequency.

[quote user=""]And why doesn't the online power profiler show this current draw? [/quote][quote user=""]

When I use the online power profiler, the max I see is roughly 100mA (even with the 23dBm LTE setting).

[/quote]

The power profiler shows averages (not peaks), as described in the bottom of the page:

https://devzone.nordicsemi.com/nordic/power/w/opp/3/online-power-profiler-for-lte

Kind regards,

Håkon