BLE power optimization

RE: BLE power optimization

Stian Røed Hafskjold — Fri, 02 Oct 2020 11:27:05 GMT

Hi, I think these are refresh mode spikes. If you search for "refresh mode" in this forum you will find more info, and plots you can compare with.

RE: BLE power optimization

ilia — Fri, 02 Oct 2020 10:59:23 GMT

Hi. Thank you I will inspect my hardware. I will have a look at ble_app_pwr_profiling.

Could you please tell what is responsible for those spikes up to ~14 uA on the chart for nRF52840DK?

RE: BLE power optimization

Stian Røed Hafskjold — Thu, 01 Oct 2020 09:12:42 GMT

Hi, the floor current consumption should be around 2-3 uA when BLE is enabled. If you see 12 uA on your custom board but not on the DK there must be something on your custom board that consumes about 10uA. It's not possible for me to comment on what the reason could be without knowing anything about your custom board.

The ble_app_pwr_profiling is a power optimized example. It starts out in system OFF, before button 1 or 2 is pushed. In system OFF you should see around 0.3uA. Then, after pushing one of the, buttons it starts to advertise and consumes about 2-3 uA between the advertising events.

RE: BLE power optimization

ilia — Wed, 30 Sep 2020 14:58:53 GMT

The previous charts show power consumption for my custom hardware. Here is the chart for the same code (ble_app_beacon without advertising) running on nRF52840 DK. What could cause such the difference?

RE: BLE power optimization

ilia — Wed, 30 Sep 2020 14:13:23 GMT

Here is ble_app_beacon example with advertising turned off. Is it possible to go below 12 micro Amps on SystemON and active ble?

RE: BLE power optimization

ilia — Wed, 30 Sep 2020 12:19:38 GMT

I just had a look at ble_app_template example. It has this constant consumption of 12 micro amps too.

Is it the lowest possible power consumption when ble is enabled?