nRF52832 DK sleep mode current consumption too high

[James168]

NCS v2.8.0

nRF52832 DK & nRF52840 DK

peripheral_uart unmodified example

nRF52832 DK with peripheral_uart example has about 1.3 mA current when LED off and sleep mode, but nRF52840 DK with peripheral_uart example just about 600 uA.

How to reduce the nRF52832 DK current consumption to approach the "Online Power Profiler for BLE" value on the web.

[Simonr]

Hi

1. When a supply is connected to P22 (current measurement header) it will have to power the entire board (debugger MCU included) if you don't also power it using J2. There are voltage detectors on the board that makes P22 only supply the nRF52832 SoC.

P21 is for external supply for the entire DK, and not just the nRF52832.

2. Are you able to get a higher resolution image here, as these spikes seem very low resolution, and hard to tell what is exactly, but if you've powered the board with P21, I assume it's related to some of the other components on the DK, and not the nRF52832 SoC.

Best regards,

Simon

[James168]

Hi,

1) The setup measurement environment is like the following,

The right black line is connected to DK's P21(-), and the right red line is connected to DK's P21(+).

The DK's P22 is connected nothing.

2) The sampling rate is the highest, and can you set up the environment on your end? Just need nRF 52832 DK, PPK2, and peripheral_uart sample, then you can zoom in/out the waveform to watch more clearly.

As your suggestion, I added more waveform graphs.

zoom in

zoom in

zoom in

3) I have changed to use NCS v2.9.0 now.