BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user18812 — Wed, 15 Jun 2022 15:04:14 GMT

Hi again Jared,

BTW we have now received our board and the problem is somehow different on this one:

u-blox BMD-360 EVK: the leakage is ~5 µA whatever the power supply voltage (tested at 1.8V and 3.0V)

On our PCb the leakage is ~8µA at 1.8V and ~16µA at 3.0V, which make me think of a resistive leakage of ~250 kOhm, but I disconnected every connections between the BMD-360 module and the rest of the board. The module power supply is also isolated from the rest of the board

The further I get, the more confused I am ;)

Does that remind you of something you know ?

Thanks in advance.

Best regards

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user18812 — Wed, 15 Jun 2022 14:27:27 GMT

Hi Jared,

Sorry I do not have Segger SES installed and I don't know how to do the porting from the Keil project to it...

Did you manage to compile the code with Keil ?

Best regards

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user73165 — Tue, 14 Jun 2022 13:57:00 GMT

Hi there,

Sorry for the late reply.

Do you perhaps have the example available with another IDE such as Segger SES? I'm having difficulty running it with the latest Keil µvision for some reason. I'll try to solve this but in the meantime it would be great if you could either provide the pre compiled hex so that I can flash a DK with the fw.

Either way, there isn't really anything such as a peripheral that uses 5 µA. The excess current could for example be due to your measurement setup. Could provide a plot that shows the current?

regards

Jared

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user18812 — Tue, 14 Jun 2022 07:26:54 GMT

Hello Jared,

Were you able to check my code ?

The deadline to get our application running is quite soon now....

Thanks in advance !

Best regards

Juan

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user18812 — Thu, 09 Jun 2022 15:10:10 GMT

Hello Jared,

Here a link to the whole Keil project (project file is in folder: .\app_code\ble_peripheral\ble_app_template\pca10056e\s112\arm5_no_packs)

https://drive.google.com/file/d/1IOQ6vG-3PFYLR3xRa5zGar9ed9CGxB0n/view?usp=sharing

Thanks again for your time !

Best regards

Juan

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user73165 — Thu, 09 Jun 2022 13:28:06 GMT

Hi,

Could you just attach the whole project folder? I tried pasting your code into the template project but I need your custom service source files as well for it to build sucessfully.

regards

Jared

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user18812 — Thu, 09 Jun 2022 05:53:05 GMT

Hello Jared,

Here is the sdk_config.h file for the project:

https://drive.google.com/file/d/1kqttjupV6Yvzd9TFl2S4DddeljwotaEB/view?usp=sharing

Here is the main.c:

https://drive.google.com/file/d/1H18uRSHpYLYm0Nlywejpr6Y4X2kstf-J/view?usp=sharing

Please let me know if any other file could be useful.

BTW everything is working pretty fine expected the idle consumption (I had to remove some parts that are linked to the app FSM but are not linked to the MCU configuration)

Thanks a lot for your help !

Best regards

Juan

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user73165 — Tue, 07 Jun 2022 11:33:27 GMT

Hi,

Yes, I agree, it seems like it's a SW issue rather than HW.

Can you share your project?

regards

Jared

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user18812 — Fri, 03 Jun 2022 15:26:56 GMT

Hello Jared,

Thanks for your answer.

I loaded the pwr_mgmt example code on the nRF52811 and the OFF mode current is ~300nA at VIO = 3V, which shows that the hardware may not be the problem.

However when loading the nRF with my actual code, which is based on the ble_peripheral\ble_app_template code with an added custom profile, I measure the idle current (between the BLE connection intervals) to be ~5uA, which is higher than the 1.1uA that I should be able to obtain considering the data simulated in the Nordic Power Profiler (devzone.nordicsemi.com/.../online-power-profiler-for-bluetooth-le)

Would sharing the sdk_config.h file help to find what could lead to this excessive consumption ?

Thanks in advance 🙂

Best regards

RE: BMD-300 EvK with ublox BMD-360 module and nRF52811 power off consumption higher than expected

user73165 — Tue, 31 May 2022 13:09:07 GMT

Hi,

Can you flash the unmodified pwr_mgmt example instead, and schedule System Off by pressing button 1. What do you measure now?

regards

Jared